sthus Black Spring Loaded Chain Tensioner For 49cc 66cc 80cc Engine Motorized Bike 2 Stroke Engine

Great product didn’t come with Allen key bolts but that’s not an issue for me they are standard 6mm and bolted right on my 80cc some people with 8mm engine studs and bolts might need to find different hardware to mount it

This part is a must have for anyone with a kit.

Excellent quality and fit, has kept my chain on for many miles. Only issue is bolt and nut that hold arm on loosens up. Needs a longer bolt so a lock washer can be installed. Do not overtighten the chain guide, it will not move and will cause issues with the bearings. Definitely worth the buy and far better quality than the closet door looking hardware that comes standard with the bike engines

When I received this item today I got to work on installing it. I was amazed on how good it works. Thank you.

Don't describe it. Very good. The wheel is way too small. They don't give you a measurement

Buyer beware. The bolts that come with it are not the same as in the advertised pictures. Also when I was installing it the bolt snapped in half inside the casing. I also had to drill through the product so that the bolts could fit in the holes. Not a quality product!

Good product I don’t have a 50cc bike I’m going to use the parts. And make a custom tensioner for my drift trike

Bolt got in way of me pedelonl feel off yesterday day