GREHUA Motorized Bike Chain Tensioner Arch with Idler Pulley Adjuster Kit for 2 Stroke 48cc 50cc 60cc 66cc 80cc 49cc Engine Bicycle Parts Motor Heavy Duty Rainbow Shape Bracket Black

Good producct I installed it and have only rode a few times since i got it but everything seems sturdy i had to switch the little wheels to other side of the bracket because they seemed to be on backwards but it was no big deal it took 2 seconds to fix it

Being able to adjust both the pulley and the bracket is extremely useful.

Don't waste your money for $25 dollars it's cheaply made the rollers are plastic and they pop off of the bearings can't get the rlers to even go on straight I was very disappointed in this product

If you are going to get a gas powered motor for your bicycle this is a musy have item. Its a real pain in the butt to align your chain but this product works perfectly.. Thanks for a great product!!!

Dont waste your time or life with the bolt on tensioner that comes in the China Doll kits. This is safer and easy to adjust your chain. This is possibly the best common sense upgrade you can add. I highly recommend this and your family will to!

Came in bent so I was unable to use the bottle wheel only thing good is that even with one wheel it works better than the spring one but not better than the original you get with the kit I wouldn't recommend buying this honestly not very effective

There could be a diagram with the oddity that is each end of this thing.

So much better than what comes with the kits. Had to do some "modifying" for proper fit, but quite easy. No regrets.