Chain Tensioner Motorized Bicycle Moped Part Bike Motor - eBay (item 260629385352 end time Aug-01-10 10:43:32 PDT)
The only other premade ones I've seen are the $200 ones. I think if you relace the spring with something more heavy duty, this would be great!
The only other premade ones I've seen are the $200 ones. I think if you relace the spring with something more heavy duty, this would be great!