Just a little suggestion to those with coaster brakes planning on using a pedal side chain tensioner. You'll want the tensioner on the top chain run. When braking all of the force is applied to the bottom of the chain. That way you won't have to build such a beefy tensioner bracket. Most of us don't pedal that often and a lighter bracket will suffice for it but when braking you don't want to run the risk of a critical component failing.
Tom
No, Racko. I'm saying for those who want to do away with the engine side tensioner and add a pedal side tensioner. If they install a tensioner on the pedal side it needs to be on the upper chain run, not the lower. This will give you maximum force applied to the coaster brake without relying on the strength of a tensioner bracket/sprocket.
Tom
I just drilled a hole straight through the frame and stock one and just put a bolt through it and it stays in place.