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Old 03-18-2010, 05:34 PM
K.i.p's Avatar
K.i.p K.i.p is offline
Motorized Bicycle Elite Member
Join Date: Nov 2009
Location: CNY
Posts: 340
Default Re: What's the real reason for Chain Tensioners

Did some modification on my stock chain guide. I did some mill work and belt-sander work on the bracket and drilled for a cross screw (remember, the area you are putting a 1/32" hole into is going to be totally captivated by 1/8" plates and two 5/16" bolts depending on the kit).

Made an aluminum pulley and pressed the bearing into it. It took a little bracket fine tuning to put it dead in line but I have it dialed in now as witnessed by two light gray centered tracks.

The bigger pulley has a much kinder radius on the chain path and spins at a nice roll.

I spent a morning working with chain lengths and half links but all variations put my wheel in a poor position in the drop outs. I was able to get both chains set about right with the wheel pulled full back but really needed to take out just a bit of slack in the drive chain and keep it from slapping the fender. Sorry I don't have any good stories, hope not to.
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