"KTM" clutch on e-50
making puch clutches engage at high rpms means they won't last long. i've always heard stuff about people using these clutches, as well as, making them start with normal pedal/push start. using a lot of info i have found on here and some trial and error stuff we made this work. here is a step by step(with limited pictures) tutorial on making these clutches work on an e50.
1. first start with the clutch. they come from an s5 franco morini motor. i'm not quite sure why people call them "KTM" clutches, because i don't think they were actually on a ktm. they did however come on LEM and Cobra 50cc dirt bikes. you can make them engage up to 9,000 rpms if you want, and they have very close to 360 degree surfacing. these already fit on the puch crank taper with no modifications.
2. the main issue with making these work is that the o.d. of the clutch is much smaller than a puch clutch bell. using helpful knowledge from an old thread, i found that v1 clutch bells have the same o.d. as the clutch. so, we used a hydraulic press to press out the gear in the clutch bell. we didn't have to do this to a puch clutch bell, because drew's pinto ripped his off his old bell months ago. then, we found that the puch gear was a tad large for the v1 clutch bell. no problem, we lathed the v1 bell slightly larger on the inside. once everything matches you find a way to hold the gear in place/centered in the bell, and weld them together.
3. next, you pretty much just put it together. you need to use the v1 starter plate and clip. luckily friction material is on the starter plate instead of the clutch on the v1 making the rest of this easy. we had to grind a little down on the outside, as it was hitting on the clutch cover in spots.
a video of the bike in action is on our blog: here
1. first start with the clutch. they come from an s5 franco morini motor. i'm not quite sure why people call them "KTM" clutches, because i don't think they were actually on a ktm. they did however come on LEM and Cobra 50cc dirt bikes. you can make them engage up to 9,000 rpms if you want, and they have very close to 360 degree surfacing. these already fit on the puch crank taper with no modifications.
2. the main issue with making these work is that the o.d. of the clutch is much smaller than a puch clutch bell. using helpful knowledge from an old thread, i found that v1 clutch bells have the same o.d. as the clutch. so, we used a hydraulic press to press out the gear in the clutch bell. we didn't have to do this to a puch clutch bell, because drew's pinto ripped his off his old bell months ago. then, we found that the puch gear was a tad large for the v1 clutch bell. no problem, we lathed the v1 bell slightly larger on the inside. once everything matches you find a way to hold the gear in place/centered in the bell, and weld them together.
3. next, you pretty much just put it together. you need to use the v1 starter plate and clip. luckily friction material is on the starter plate instead of the clutch on the v1 making the rest of this easy. we had to grind a little down on the outside, as it was hitting on the clutch cover in spots.
a video of the bike in action is on our blog: here
"KTM" clutch on e-50
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