Centrifugal Clutch install problems

S

ScottishSk8r

New Member
Hey guys, I started my pull start and centrifugal clutch install today. I was following the zoombicycles instructions and all was going smoothly until it told me to install the new gear and clutch assembly. I removed the shear pin from the shaft and it looks like the new gear should slide right on to the shaft, but no dice. I tried throwing it in the oven like you do with bearings but it still wouldnt fit on. Does anybody know the trick to getting this sucker on there? Thanks.
 
I got my centrifugal clutch kit from ZoomCycles, too. It came, like, yesterday.
I have found that the tapers on the crankshafts vary from engine to engine, loose sloppy tolerances, etc. I test fitted everything on a spare crankshaft that I have, and it fit perfect, then when I tried to install it on my regular MB, it stuck out too far from the end of the crankshaft and rubbed against the outer cover when it tried installing it.
I machined away most of the taper on the clutch and also machined a keyway into it so that I could use the Woodruff key from the stock gear.
It slid on nice and smooth, and took in the little bit of taper left when I tightened the bolt down.
There are other posts on this forum writing about how the taper-fit clutch assembly has spun on the crankshaft, thus wearing away the taper, so right away, I modified it for use with the key.
As of now, I have put 50 miles on this setup with zero problems.

I like how it works, and from now on, all my MBs will have a centrifugal clutch on them.
 
I started to install a centrifugal clutch. I screwed the gear puller in the gear and when I
tightened the bolt to remove the gear the threads in the gear stripped. Got any ideas
how to get the gear off with stripped threads?
 
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