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Old 03-26-2014, 10:25 PM
Motorized Bicycle Elite Member
Join Date: Jul 2010
Location: CA
Posts: 1,749
Default Re: what did you do to your motorized bicycle today?

I had to remove engine, jack shafts, and gas tank from frame to modify both left and right side of rear stays on frame.

I cut and welded notched out sections to accommodate the sheave for belt drive and the knobby tires.

For more than safety I am designing more complete covers over the dual jack shafts that have pulleys, belts, sprockets, and a chain. This is since I removed the stuff temporarily to not get damage from near by welding I was doing on the frame, I saw how grimy the chain and sprocket had gotten.

I sort of wondered if complete covers over chain have been done before. I know the new thing is shaft drive and then it is all concealed.

Belts don't need lubrication and do not get that much grime, but small pulley less than 2 inch diameter sucks trying to not slip with 21:1 ratio 3hp 4stroke Briggs trail bike. That is where a short section of chain between two sprockets I use chain lube.


Last edited by MEASURE TWICE; 03-26-2014 at 10:27 PM.
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