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Bike Master cylinders

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involutecurve:
The Hub now then there's a question, I looked on the web to see what others had done, I also looked at Jack Difazio's patents, however the drawings are not upto much and give very little detail, all the other images I could find are of completed Hubs with little or no info on the details, having said all that I decided pretty early on I wanted to do my own, its basically a kingpin setup, I decided I wanted taper roller bearings, the rest was designed around this, the main problem was making it small enough with enough steering lock, and with some steering offset, also making the kingpin bearings adjustable for preload without removing the wheel, other problems to overcome where machining the external and internal splines with the equipment to hand, I ended up designing my own splines loosely based on the Torx system, this worked very well on destructive test pieces, other major  obstacles are bump steer and anti dive levels, I used Tony Foale's suspension software for the anti dive calcs, this is set at 50% digressing, the bump steer I did by animated cad drawings, I also use this method to draw the suspension links front and back, in tests up to now on full bump I have 2 thou deflection at the bar ends, I have ridden the bike down our lane without power, brakes or handle bars!, and it steers pretty neutral, this only happened when I brought the bike to the new house, I couldn't resist, I don't claim to be breaking any new ground here, I just wanted a CHS bike, but I also wanted to see if I could do it in my home workshop, besides I could not justify the money to buy one, I still have a lot of work to do, the main parts left to make are the Rads the fuel tank and the *@*#**&* Wiring which I don't enjoy....   :)

SteveT:
Very nice work, it all looks well made and bullet proof   :clap:

banjaxxed:
I came across this thread by accident sine I like the homebrew engineering wotsits you find on here, also your thread on apriliaforum very impressive work Shaun

Alan

involutecurve:
Actually the Aprilia threads not mine, I posted on there initially to ask some questions about ECU's etc, it turns out there are two version of the Aprilia / Rotax 990 engine, Gen 1 and Gen 2, I was unaware of this when I acquired my engine, which I removed from a bike that had only covered 800 miles before the guy low sided it on a roundabout at 10 mph, :palm: apparently the bike was hardly damaged until a person of the opposite sex! came round the roundabout and ran over the bike bending the frame which wrote it off...... :clap: :clap:
Back to the point when I removed the engine I also got the harness and ECU, I could have removed the clocks but the speedo glass had a small crack in so I didn't bother,   :bang: only to find out much later that the immobiliser is built into the clocks and is married in the factory to the ECU, rendering the ECU useless!  :Doh: and costing well over £2000 to replace them, I found out I can use the early ECU with older Harness and gain power to boot........  :lol:

banjaxxed:
The GenII magnesium motor has some benefits but the stator is a huge problem for a start, even aftermarket does not help with the eventual burnout of the windings.

And yes well that wasn't your thread originally but great derailment interest was piqued :)

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