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Just wanted to update anyone interested in tuning the 50cc Ace :) I have done the following modifications: * 72cc cylinder * High compression top, more profiled cams * Tuning exhaust (no cat, no EGR) * 22mm carb * 40 tooth rear sprocket (20% higher gear ratio) * Performance CDI * New better...

I have compared mine to a GPS. 50km/t on the speedo turns out to be 55km/t. Combining that with the fact that most cars show about 5km/t too much, I usually have to keep 40km/t behind cars in 50km/t zone.

The source is definately at the back and makes it impossible to drive. I have checked the spokes, and they seem nice and tight, but truying a wheel is beyond my knowledge and tools. I probably will have to request a new rear wheel from my dealer, but god knows how lang time that may take... In...

Has anyone else experienced their Ace starting to bounce at about 20-25mph? Quite vigorously... I'm thinking a bad rim or tire? Or could it be something else? Completely new out of the box... Frustrating!

I have recently received mine (took 5 months!), and calling it slow is an understatement. Pleasently surprised by the grunty sound though! On Sunday I will perform some modifications to it, and hopefully that will make it driveable :)

Re: Ace 50 Custom I have just ordered one and can't wait to get it! I also bought the 50cc version, as I have not finished my motorcycle license. Would you mind to share where you got the engine parts?