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Old 07-27-2010, 04:51 PM
KCvale KCvale is offline
Motorized Bicycle Elite Member
Join Date: Feb 2010
Location: Phoenix,AZ
Posts: 3,552
Default Re: A new shift concept for the engineers....

Seems to me it would easier to just device a 3-speed hub design for the motor drive sprocket that would gear it say 1/2 a tooth either way internally.
You would need a modified clutch cover but the sprockets and chain themselves would remain aligned.

And for the 'dreaded tensioner problem', you almost Never Need a Drive Chain Tensioner!.

And for 410H Z chain I'm sold.
The regular Z chain my Giant 3-speed shifter came stock with and the jackshaft I put on broke it after about 100 miles.
It now sports the heavy duty 410H and no problems.

Just more ideas to keep a coaster pristine but add gears to the second drive chain ;-}
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