Use our chain adjuster tensioner for the Monster Moto / Mega Moto Classic 105cc, Classic 1000w, MM-B80 80cc, Motovox MBX10, and MBX11 mini bikes to keep the right amount of tension on your mini bike's drive chain. We offer our customers a choice; you can order either one of our standard adjusters, or you can order the optional heavy duty version for only a couple dollars more. Please note that our heavy duty version is just that --heavy duty. With a beefier, burlier, larger diameter shank, you might even have to slightly ream out the mounting hole on your bike to accommodate this version's shaft girth. But if you choose this option you will be happy that you did.

Mini bikes need a stout chain adjuster to retain the rear axle bolt, allowing the tension on the chain to be adjusted to suit the rider. Having a chain that is too tight is almost as bad as having a chain that is too loose. Either can damage your mini bike and spoil the fun.