Author: Shaun
Design -- love it..!
Front spacer (revised)
I made initial plans to get a custom replacement for the spacer where the speed sensor used to be. However, after it was priced up it made little sense to get it for the moment when there are more crucial parts to acquire, so I refurbished a 10 quid speed sensor with clean, acid etch…
White yoke
White yolk, I managed to try out a colour option. I went for a durable white enamel after acid etch priming the aluminium and steel parts. Originally white was specified as the accent colour and for the triple tree heads so I went with the spec to see how it looked. Still deciding, will leave…
Shock absorber bearing
After refurbing the rear arm linkage. Realised that the Showa MAL-G01 shock absorber (originally from a Honda CBR 600) needs to be refitted. New needle bearing needed, slimmer than used in the shock though. Measured up the hole and 20mmID, 24mmOD, 20mm length is needed. Easy to find on eBay. Should in action very soon.
Suspension linkage refurb
One of the essential items left on the list to refurb is the rear suspension linkage to sort out geometry before the hub motor arrives. With the extra torque I need to ensure the back is tight and secure; new bushes, seals, and covers all around. Finding the parts was a struggle. Many parts were…
Stanchion hard re-chrome
Have been looking at the stanchions from the old forks while working on other things, and I have come to the conclusion that I can’t stand the pitting and dents any more. In reality these could get worst and contribute to further damage later on down the line. Found a nice place over in Crewe…
Fork tear-down
New oil & dust seals have arrived for the forks so time to open them up and see what is inside. Holy crap… the oil lock was jammed into the top of the damper rod instead of the bottom, the stop clips were crammed down the side of an oil seal, and strangely found 18mm…
Caliper restoration
The calipers that came with the forks needed some TLC to ensure the bike has some stopping power. The pistons were corroded into the calipers. A bit of heat released them easily. The pistons, bolts, and aluminium calipers were reusable. A chemical strip, clean, and polish were all that they needed. However the seals, pads,…
TKC80 Continentals
xj600e got some new shoes. Continental TKC80. Dual surface rubber. On trend for cafe racers and scramblers. Look cool on the on the frame. Could only mount one on the front as the hub motor still in transit from china. Need to get some tubes, common on enduro tyre apparently. Haven’t seen an inner tube…
Seat Hoop v2
The seat hoop needs amending to give more clearance for the wheel travel. Bit of chop and weld will suffice surely. CAD drawings below for new hoop link at 21 degrees and chopped hoop.
front spacer
A new front end is in construction and as a result a new spacer set for the front end is required. The forks will be original to the 1991 XJ600 this time so the calipers can be used on the current front wheel. In fact all the parts can be reused except the speedo sensor…
Seat hoop fabrication
Managed to get a some help from engineering to fabricate a hoop for the new bike seat. The radii are more uniform than the very slightly tapered appearance of the original drawing. This is due to the constraints of the available dies. However I am not disappointed with the overall appearance. I think some mocking…
xj600e: Surface update v4
Have updated the sketch surfaces on the xj600. Tried something different to lighten the body. The front of the lower farings now aligns with the contours of the frame to see how that works out. The bike definitely looks lighter. However on the next iteration I might re-establish the lower air intake to get more…
xj600e: mirrors and ambers
The wee bike has some safety gear now, mirrors and some indicators; some end bar kit. wires from the front are mounting up. Think I need to get some shrink wrap and some water tight grommets for the back end of the bars and to bind the red, white, and black indicator wires. 1 x…
xj600e: Seat hoop
The hoop and stand that will support the new seat/cushion needs to be fabrication ASAP. Drawings have been produced to send to skilled craftsmen.
XJ600e: Ergonomic check
A mock-up of the components in the xj600 package have been fabricated in soft media to complete a quick and dirty assessment of comfort and collision in relaxed and enthusiastic riding positions. Having not experienced the package before today doubt has inevitably been an issue. However, these were unfounded. The a male and female were…
xj600e: original suspension
The original suspension is finally mocked-up in CAD and positioned correctly to ensure the new body designs do not interfere with the working mechanics. That is all.
xj600e: GOM scan
Ryan at the NTDC worked his GOM magic on the chopped xj600. After I cleaned up the file I managed to crunch it down to about 500mb. This is about 10 time bigger than the artistic scan but the detail on this scan is fantastic. This is definitely one of the most accurate scans I’m…
XJ600e: GOM Scan prep
Okay XJ600e is up on the plate for a GOM triple scan. This high end metrology system is as accurate as needed. Even with uncertainties of human operation apparently it will visually measure surfaces within accuracy levels of 10 microns. Had a couple of queries about the density of the reference dots but having seen…
First blood
Have made the first cuts on the frame today in an effort to move things on over the festive period. The tail was cut to the size specified in CAD but I have no doubt that there will be differences as the original scan was mainly visually accurate. The next phase will be to scan…
Surface update 3
Surfaces are developing slowly in the time I have between teaching and living the parenting life. Have pushed the top and bottom covers closer together to make the over all form smoother rather than fragmented. Also refining the surfaces around the feet. Traditionally clearance is needed around the feet to allow foot pivoting from the…
Package check
Thought it good to revisit the technology package to check it as make sense to have most of the components in the CAD laid out accurately. Having looked again at the kit spec for the 8kw motor I find that the controller will need to be switched if I upgrade so best to do that…
XJ600e: headlights
Have started to attain components for the XJ600e. Starting with a headlight, bought from China. Works well when lit with 24v. Need to investigate how this would be powered with out the main battery pack. It has been suggested that I should use a second 24v power supply that is recharged by the main one…
Seat Chop?
Have been thinking about a seat chop [rough mock-up pictured above] to improve the proportions of the XJ600 in profile. The old seat felt to rear heavy and to be honest it’ll never carry more than one person. Pimmel and Messer [pictured below] have made an interesting seat chop on an XJ600 mounting the seat…
Benchmark: Move along, nowt going on here but custom racers
Some of my fav cafe racers, flat trackers, and scramblers examples here. Just love em.
XJ600e: New cells
Have found a new more efficient cell configuration and package: Still LiFePO4 cells; the new configuration proposes 24 units of 3.2v 100ah prismatic cells connected in series. to give an overall 76v 100ah pack, 3C continuous (5C peak). This package along with a BMS fits into a 420 x 280 x 250mm dimensional envelope….
Research: Electric Motorcycle News
Electric Motorcycle news have been kind enough to help spread the news about the research that is being conducted at the NTDC and XJ600e is pictured in it. This a massive help to help build the data that will underpin the various design my students will produce. Many thanks to all at EMN. Link here:…
XJ600e: Sketch surface v2
The design of the XJ600e sketch has seen updates. However much still needs to be resolved for this single designs. Looking forward to seeing more focused designs. It would be good to this in different formats. Proposals for the X, Y, Z generation will be v-interesting.
XJ600e: Airflow?
Started to wonder how the air flows through front air intake. While watching the airflow in CFD at 40mph and 70mph (pictured) I noticed that the flow is sucked into the air intake over the wheel and around the wheel. Think the solid wheel help with this as there is no turbulence around the wheel….
XJ600e: Swingarm mods
Have made some mods to the current swingarm frame to accommodate the suspension strut in the new position. There are some interesting swingarm designs around, seen in the photos. The modified xj600 swingarm borrows elements from them to ensure reliability. Mods have been made to the current XJ600 swingarm because fabrication of the wider arm…
XJ600e mixed reality set-up
XJ600e is prepared for mixed reality development in the NTDC, a place where it is finding a new home for the moment while the research design phase is executed. The frame chassis has been secured temporally on a 500kg lift and is stable enough to hold in addition a rider, and dense foam milled from…
RattleCAD
While surfing the Interweb I bumped into an interesting simple frame building application called RattleCAD. It’s main use seems to be for bicycles but basic geometry and triangulation is similar on bike frames in general. One day I might have a go. http://rattlecad.sourceforge.net/
Research: Sustainability and Two-wheeled Transport
As part of my job I conduct research in to Automotive & Transport Design. For this latest project we are using questionnaires to better understand Sustainability and Two-wheeled Transport. The link to the survey is below, It takes 5mins and you’ll help make designs that are more appropriate to modern needs. https://coventry.onlinesurveys.ac.uk/sustainability-and-2-wheeled-electric-transport The agreed description…
XJ600: Sketch farings
Started to sketch some farings into the model to see what the proportions are like with the big old cylindrical batteries. Looks like a bit of a beast… With curved body work it slims down quite well. Quite like the look of the exposed batteries. Kinda like an electric version of a semi-naked bike. Might…
XJ600e: CAS in VR
Ryan boshed the XJ600e CAS into VR. The colour and texture rendering is not compete. However, the sensation of interaction with the vehicle is very defined and realistic to the extent that one feels that one would knock the bike over if you drag your leg across the frame. It was interesting to see the…
Suspension geometry V2
Managed to mock up an animation of the new more efficient suspension system that pushed loads along the strut with minimum rotation at the static mounting point that is at the node of the frames triangulation (bit of a tongue twister). A distance of 140mm wheel travel is possible with this geometry, this is more…
Swingarm refinement
Had a good meeting today with Geoff Booth (motorbike and advanced manufacturing engineering specialist) that helped to direct the design of the rear of the XJ600e. Main factors discussed were swingarm design and rear suspension. Overall no big changes to be made but some tweaks would make the design more effective. First being to stretch…
Public charging
Bumped into a charge point today and noticed that there are many types of charge point sockets and plugs. Really should try to find out which types are the most popular in the UK to install one of those in the bike rather than having to find a domestic 13A mains plug and carry a…
Swingarm clamp v2
The swingarm clamp has been updated to reflect creative changes made in 3D CAD. Additionally the lug that fits inside the 2mm walled 25 x 60mm box tube is lengthened to make a more positive joint and some extra weld holed on the box tube have been added. PDF here: swingarm clamp v2
Swingarm mods
Started making some obvious swingarm mods. The first is to provide more strength on the inside by the first bend/weld. Some U-section metal will be welded to this point, pictured in red below. The second is to provide some rigidity around the strut mounting point and to provide more strength and rigidity around the front…
14kw fitment
The pivot ends on the 14kw 273 motor are particularly large, and the motor wide. The speed of rotation and the mass of the wheel unfortunately prohibit the use of conventional pivot bolts and nuts. Hence a new swingarm must be fabricated to hold the new motor. The new design [pictured below] needs to be…
XJ600e: VRED VR
Popped over to the NTDC (National Transport Design Centre) and Ryan the resident VR genius and I discussed a Keanu Reeves video that depicted him checking out some Motorbike design in his Arche studio with some wired VR glasses. He detached his desktop computer from the desk [I had no idea it was detachable], clipped…
3-legged Daan
Meet Daan, my three legged friend. He helps me when I have ergonomic issue to solve. He is Dutch and a 97.5%ile adult male, the largest type of manikin used for anthropometric evaluation in transport design human factors. Daan sat on the XJ600-e to see how it felt. Without any farings he had a approx…
New caliper piston
Front caliper piston refurbishment is completed by Zed Parts. The original piston was severely corroded. Efficient stopping power is now guaranteed. Can now go ahead and refurb the rest of the caliper. Awesome!
XJ600e: RP Mock front spacing
Need to mock-up the spacers to check they fit before fabricating them in stainless steel. The round end nut will need drilling and tapping and M14 thread with a fine 1.5mm pitch, the rest should be accurate to slot them straight into the assembly. STL file is stored here: https://livecoventryac-my.sharepoint.com/:u:/g/personal/aa5147_coventry_ac_uk/EVev3KJR-_9EnrFfMZnj1AYBreTbDbn3QL-qmHl5dZ_vgQ?e=egytSg
XJ600e: Front spacers
Finally stripped the bearing out of the wheel so I could get a measure of all the spacing parts. Have put together a quick drawing to base fabrication on. PDF file here: front wheel spacers
XJ600e: LiFePO4 Headway cells, 273 hub motor
Have managed to have a first bash at packaging. A very rough start with no accurate dimensions. However, the cell sizes for the Headway LiFePO4 cells are realistic, as is the XJ600 frame. The hum Motor and tyres are random objects that need to be speed-up properly from conversations with manufacturers. After trying a couple…
xJ600e: front wheel spacers
Had some thoughts about the front spacers. as the forks are not from the XJ600 then all the spindle spacers and bearing sizes are different. To be honest it would be easier if I knew the exact model that the forks came from but it isn’t a problem. Made some plans. Will mock most up…
XJ600e: Scan day, yay!
https://youtu.be/lT8ZJ9caWs0 Finally managed to get the bike in the workshop to get some 3D photogrammetry for CAD development. The addition of primer worked a treat. The camera picked up the tubes and detail. Just some stitching from the marvelous Mr. Perkins and all will be good. Sure the students will appreciate this so they can…
XJ600e: Part drawings
While chatting at Zed Parts a parts list site was recommended to me by Oz. – Consolidated Motor Spares: http://www.CMSNL.com It has all parts for the my xj600 1991 with part numbers. Very useful indeed to understand the assembly of the mechanical parts designed for the bike and the order they assemble in. Pics n…
XJ600e: Primed for scan
The frame has been matt grey primed for a scan because previously the cameras had trouble picking up the surfaces well due to reflections. Although this is an un-etched coat to make removal easy I like the look of it in a lighter matt colour. However, it is not for me to make such decisions……
XJ600e: Rolling chassis weigh in
Have had to weigh in all the parts in the rolling chassis to help make calculations for the powertrain: 7.1kg – 2 Forks 3.3kg – Triple tree (top & bottom yoke) 3.8kg – Rear shock 2.6kg – Front brake and handle bars (lever, calliper, and reservoir inc.) 6.5kg – Swingarm and pivot bolt 12.5kg –…
Benchmark: Shanghai Customs
A Shanghai based custom bike builder have started to retrofit the legendary Honda Super Cub. Shanghai Customs spec is as below: 1.2-kilowatt battery 2,000-watt hub motor, bldc controller Panasonic 3.7v 3.400 mAh lithium-ion 18650 cells. 40 kilometers at 45km/h. FB site is here: https://www.facebook.com/shanghaicustoms
Users: China’s Electric Revolution
A short, comedic piece discussing the rapid growth and current reliance on eBikes (electric scooters) in Chengdu, China.
XJ600e: Battery spec
Had a very interesting day at work. Michael Apicella, a doctoral researcher in electrification, met with me to discuss the pros and cons of different battery options. Michael works in the Universities Future Vehicle Labs that develop hydrogen fuel cell cars. He is also a big fan if motorbikes. Considering various attributes: 350kg estimated total…
XJ600e: New front end
Have had a couple of matching issues with the forks. To make the old set work I would have had to make a collar and extend the thread on the stem of the bottom yoke or the triple tree. So instead of trying to force parts together I dropped into Flying Colours and did a…
XJ600e: Integrated body?
Tried a design that integrates the tank and side farings together. Looks interesting. bit more mordern. Is this what I want. dunno. Will sleep on it. Zzzzzzz!
Benchmark: eStel Scrambler
Apocalypse Custom Electric Motorcycles are a Philippines’ custom bike builders. They specialise in retro-fitment of donor bikes for customers. One of there show bikes is a eStelle a personal favourite. Very cool. Spec is below: 72v 30ah lifepo4 batteries 18 fet 4110 infineon controller (120 battery/220 phase) QS273 v3 hub. Facebook page is here.
XJ600e: Knee scoops
Had a quick go at a loose human occupant package. 97.5 male %ile manikin and xj600 bike are to scale. When laid over a sketch it would seem that I am on the dot for the scoops at the moment when it is positioned in line with the intersection of bars that are normally under…
Seat hoop
Looking at seat hoop options. The travel in the wheel is short but is close to the seat bars. All considered an angled hoop might be a sensible choice to give more room for rear wheel travel. Some examples are below. How this will work with the current seat angles is a job for a…
XJ600e: v2 front end & side
Started to think about body work at the side and front end. Knee scallops need refining. Really need to do a package to see where knees actually sit on 95th %ile male. Saw some leaf batteries in a e-motorbike and they looked wide so pushed out the body work to see what it would look…
XJ600e: Contours & details
Need to start thinking about surface contours for knees, air outlets for front intake (presuming batteries produce some heat) and to create more interest in places. Just doodling. Need to start sketching in perspective to get a better feeling for the forms. Preferring shorter seat and gap between tank, may continue with these features.
Benchmark: XJ600 Terror Cafe
have been looking at XJ600 Cafe racer conversions on the internet and bumped into this ‘Cafe Terror’ bike on Custom Motorcycles Poland Blog. Looks good, nice to see how a low XJ600 sits on the road. Have noticed that the suspension at the rear is similar to mine in terms of stance. The front forks…
XJ600e: V2 stance
Pulled an underlay from the last photo of the frame to sketch on top of to help see if all is going in the right direction aesthetically. I like the lower rear wheel but feel either front drops of the rear needs pushing up slightly as it looks like it is squatting slightly at the…
XJ600e: Dry run assembly
After chasing around for parts I thought it best to check that all the parts to date kinda fit together as Zed Parts were close to finishing the frame strip. have had some problems with the forks but have managed to kinda resolve that today. Have got some 40mm xj600 forks (previously I has some…
XJ600e: Triple tree head
Got a triple tree from Flying Colours. The guys at Zed Parts gave it a strip and de-rust and it was just a case of cleaning off the flash with a wire brush. It has a couple of war wounds but I don’t mind those as there are no structural defects. Just need to get…
XJ600e: Wheels
Got a nice eBay deal on some Original Pre-diversion wheels to set up the stance. Took a bit of cleaning up but after some wash down with a soapy jet wash and a wire brush they look pretty clean. Will probably keep the front and cover the spokes. If I eventually opt for a hub…
XJ600e: Showa shock
Grabbed a Showa rear shock from flying colours. The length matched the original. however the bushes were slightly smaller. Will have to get new bolts or bushes… or both. Spring looks a bit scuffed too. will eventually refurbish these. Oh well, onward brave soldiers eh.
Battery calculator
Battery calculator here: https://power-calculation.com/battery-storage-calculator.php
Benchmark: Solid aesthetic
Looking for a while at aesthetics. A trend of custom builds that I feel pulled towards is the filled in wheel as can be seen in the rides pictured by Le French Atelier. As I have a hub motor I keep thinking of ways to hide the main drive unit. Not sure why but I…
XJ600e: Factory wheel sizes
Aiming to start setting up the rolling chassis for the xj600. Factory sizes for the pre-diversion wheel are: – Front: MT 2.15×18″ – Rear: MT 2.50×18″ Just need some 18″ enduro tyres now 🙂
XJ600e: Scan 01
Took the XJ600 frame into the workshop for a scan today. Metallic objects reflect the cameras so it is possible to get a better scan if painted. So off to Zed-parts it goes for a chemical dip to strip it down to metal and then to the body shop for a quick coat of primer.
Benchmark: Night Shift Leafy Savage
Night shift have produced a beaut of a retro fitted e-bike. Using the battery packs from a Nissan Leaf and using Enertrac’s hub motor. Reflecting on my XJ600 build, this could be an option. Recycling some automotive cells. Anyway, some pics of the Suzuki re-born , from the nights shift website, are below. Text from…
Benchmark: CAKE Kalk
CAKE have produced an off road e-bike called Kalk. I like the emphasis on being light weight and skeletal but am not sure about the traditional use of the chain, trying to cut down on mechanical moving parts. More things to maintain and fail. Company text states: The Kalk production series is the second among…
Enertrac MHM602
Had a very interesting conversation with a realy nice chap on an e-bike forum in the UK. He suggested that I look at Enertrac hub motors too in terms of gaining some choice for hub motors. Website is: http://www.enertrac.net/product.php Product text for the Enertrac motor is: This motor was designed to make the gas to…
XJ600e: Frame & Suspension (Haynes)
Decided to scan the usable pages just in case the book becomes damaged of I need to access it online while off-site. Currently managing the rear swing arm, forks, yokes, barrel bearings, and rear strut so I have scanned these pages and have popped it onto a PDF: frame and suspension pages
Sustainable bike?
As a research designer and academic of consumer automotive and transport design I have seen many trends; a very worthy trend currently being ‘sustainability’. It is one that the man on the street can contribute too as well as big industry, and the result of being sustainable is positive. We prolong the life of our…
XJ600e: Diversion Haynes manual
Found a sassy Haynes manual for the XJ600 Diversion on the internet on the oxfam website. Obviously a classic that someone decided wasn’t needed any more. For £4.00 I was very happy to swipe it up. If only for the diagrams and the correct assembly for the frame components that are being carried over as…
Benchmark: UNIMOKE
Unimoke have released a new e-bike that appeals to the new generaation of electric bike users apparently. Looks like a minimalist wee moped – Nice. Looks like a L1-e B category. The company text is as follows: “The UNIMOKE is a cool and tough crossover urban utility e-bike that blends the amazing looks of a…
XJ600e: Shorter tank
Experimented with a shorter tank in sketchwork to give more variability on the seating position. Also increased the height of the tank to raise ensure it is the highest part of the bike, a traditional stylistic factors of a cafe racer. not sure about the seat but think the farings and the covers under the…
XJ600e: Nobbly vs Race tyres
– Nobblies look much more interesting. – Nobbiles. More authentic, The great escape springs to mind. – Nobblies are my choice, more in proportion to the frame. Although some question the function of a nobbly tyres on a low bike with race posture and stance: – The seating position is head down, bum up, which…
Benchmark: Sarolea Manx7
A nice electric bike being promoted by Sarolea. Text below: The core of the MANX7 is a carbon fibre monocoque chassis. This combination of materials and techniques results in a lightweight, super strong and rigid chassis. For a low total weight and optimum safety, the swingarm is also made of lightweight carbon fibre. Due to…
e-motorbike words from the DVSA
I Contacted the DVSA (Driver & Vehicle Standards Agency) to get a better understanding of the regulatory guidelines for the design of 13kw e-motorbikes. I wanted to ensure that our prototype is of a regulatory standard from the start if there are any. Replay was as follows: Hello Dr Hutchinson, Motorcycle derived vehicles fall into…
XJ600e: BRAT / Cafe design?
Had a wee crack at simple brat style stance and panels with the 17inch wheels. The way it was set-up in the last photo it was too high. this still needs a fair amount of refinement and to visualisation from other angles but looks like it could be an interesting direction. Battery cooling is a…
Benchmark: The cafe racer
Looking around I thought it would be interesting to build the bike it to a cafe racer style. Seems like a popular format for the modern hipster crowd. After funding out that sportbikes and replica sports bikes are on the downturn I’m eager to avoid a format that visually shouts ‘speed’. It seems that a…
XJ600 Yamaha history
The Yamaha XJ600 was a relatively light motorcycle with top half fairing and around 72 bhp (54 kW). The XJ600 was built from 1984 until 1991, when it was replaced with the Yamaha Diversion/Seca II. In North America, the bike was sold as the FJ600. The 1984 Yamaha XJ600 and FJ600 were notable for being the first Japanese inline-4 motorcycles with…
XJ600e: 17″ rims
Put together a scale composition with 17 inch wheels. doesn’t look too bad. gives a good start for sketching. I have up to now bee hesitant to start drawing without an accurate start. Not good enough for modelling. Will have to get the frame scanned to make something good enough to make fairing patterns for…
XJ600e: Yamaha XJ600
Finally plucked up the courage to start building the electric ride. I found a 1991 XJ600 Yamaha steel frame to kick off the proceedings. Need to sort out the swingarm apparently the parts can be hard to find. The search begins.
XJ600e: QS Motor
http://www.cnqsmotor.com/en/article_read/QSMOTOR%2017X4.5inch%2012000W-14kW%20273%2096V%20120V%20Water%20Cooled%20DC%20Electric%20Hub%20Motor%20For%20motorcycle/538.html QS TEXT: Now, the new 17″X4.5″ mould is ready, it could be 12kW 273 70H, and 14kW 273 80H. The mould is made for water cooled version. It could also be customized to be air cooled. Please note the wheel, two side covers, stator are all new mould, not made by hand. So this…
Benchmark: Barbara custom renders
Found a very interesting article on Designboom that visualised various brands in futuristic forms — Barbara custom motorcycles. Quite awesome!
Legalities of eBikes
One thing that is becoming quite clear is that there are a number of issues concerning the use of eBikes with a certain amount of power. With a speed limit of 15mph the current laws for usage on the road are quite compromising. An interesting video on youtube has been made by a guy called…
Benchmark: DIY e-bike
I like this video of a honda conversion: http://www.instructables.com/id/How-to-build-a-72Volt-electric-motorcycle/ Another video of an e-motorbike is by a young lad called Kimball Crawford. Clever lad. used a lightweight frame
Electric bike?
After visiting china and seeing how easy it is to convert a bike from petrol to electric. I’m starting to think about putting together a wee electric bike project. Could be a fun little task to do when my research dies down to keep the research engine running. Could even give it the full design…
First things first, ‘egg your bread’…
You should try an runny fried egg in between two bagel halves. If you put it together right you can make lake of yoke in the bagel’s hole. Just in case you need a hand with the mythical lake of yoke please see the picto instruction.
An electrifying life on two wheels... 