yeah man i had the same problems. i would recommend a good #415 (& extra links just in-case) dirt bike chain and replace the cheap bolts on the tensioner with quality ones and lock washers or lock nylon nuts. be sure to align chain where sprocket rolls in the center of chain. but leave just a "little" slack and keep chain lubed if needed, i used WD40 "im not sure" if thats right or not but it works for me. just wipe away the extra lube so it wont splash on you.