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Old 05-31-2009, 07:03 PM
yodabob yodabob is offline
Motorized Bicycle Senior Member
Join Date: Jun 2008
Location: North Wales PA
Posts: 82
Default Chain and sprocket modification

Finally got a chance to modify the sprockets and chain to a good quality #40 chain. It’s a tight fit but it can be done. Tight tolerances on the engine 10T sprocket and the rear I machined a clamshell hub and keep the nine hole pattern on rear sprocket of 45T. I’m into power not speed. The idler is a clamshell aluminum mount. Idler is uhmw with a one-inch roller bearing cam follower. The bear is being changed to a track roller bearing when it arrives. Will take better side-to-side pressure and it good to 1400 rpm. See attached pics.
It is like a whole new machine now. Vibrations are next to nothing now, no chain to sprocket noise. Just the chit chit bang bang of the exhaust now.
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Attached Images
File Type: jpg DSCF2026.jpg (36.0 KB, 286 views)
File Type: jpg DSCF2031.jpg (45.0 KB, 194 views)
File Type: jpg DSCF2032.jpg (59.9 KB, 169 views)
File Type: jpg DSCF2034.jpg (42.2 KB, 172 views)

Last edited by yodabob; 05-31-2009 at 07:08 PM.
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