Originally Posted by Jarred93
I was wondering what can I use to substitute for the crappy plastic chain tenttioner that comes with the 80 (66cc) kits?
I was thinking about using the rear derailer gear from an old bike and drilling holes in the frame/ possibly welding to the frame to attach, and using the screws in the gear system to adjust up and down?
I replaced mine, well, just the plastic wheel with a 15 dollar lawn mower idler wheel with bearing I got at a local bearing shop.
Just look for lawn mower idler here is an example of a WONDERFUL one, as long as it isnt too big, most mower idlers will work, they are only a small fraction larger than the plastic wheel...
actually the one i am using is right here at the top of the page 280-016
All the ones i have seen have come with a 3/8" bore which is exact fit.