sthus 80cc Motor bike GAS ENGINE parts - SPRING bearing chain idler tensioner & PULLEY

It's heavy duty. But I needed the masterlink was suppose to come with. For 15 buck's in should have gotten the masterlink

Once you replace the provided spring with a heavier duty spring, this tensioner works great!

Completely useless. For the people that say "if you replace the spring, it works perfectly fine". Why do i need to replace the spring? It should have came with a stronger spring. No picture because i took it off the bike before i torqued the bolts down.

After installation while riding the swing arm, came off from the bearing, and this caused the chain to lock in the housing of the sprocket, (see picture) causing the rear wheel to lock. One of my rear tire spokes was also broken by the swing arm and the broken spoke was pushed into the inner tube. So now I have a damaged rear wheel, and a damaged inner tube. Chain tensioners sound like a good idea, but with fluctuating tension, your chain may jump off the engine sprocket, I'm going back to the original manual tensioner.I returned the item via an Amazon locker, the item was picked, now Amazon contacted me that they do not have the item, and they want to charge me the full price, FRUSTRATING.....

When they pressed the bearings in they squished them so they no longer rotate so needless to say it does not function properly it will not tension my chain because the spring loaded feature will not operate without a working bearing

Poorly assymbled not worth the money at all boight 2 for 2 bikes and one worked barely ended up having to remove it anyhow as it binds and the other one that didnt work is just a stationary one as once bolted it did not apply "tension" it didnt even move yes i assymbled them correctly they are a good concept that needs reworking

Tensioner arm bearing is welded in (and seized) from the factory.. Clamp bolts are soft and slightly too short. Fix the bearing issue and include longer harder bolts and it's a good deal.

Stronger than the original