Re: what did you do to your motor bike today?
sat on the plastic dog food dispenser and re-engineered the tensioner...the flat spots that allow it to be tightened without turning inside were rounded and it kept coming loose...put a couple washers on the inside to make the large boss..."stick out" (so i could get a vise grip on it) then put a skateboard wheel bearing on the inside...to help with the off center bearing placement....(ground to proper width...and drilled....tightened it all up...and wallah! a chain that stays taunt. I'm soooo happy.
also put my 7 speed derailer on the bike chain as a "tensioner"...works great as well.