Standard & heavy duty options Adjustable Nut included Just the right size for a mini bike Chain stays not too loose, not too tight 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 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, burl