If you're running up to 300 line amps this is the kit for your qs165! This will only work on the Midwest Mini Mods swingarm that has been modified to fit it. All new qs165 arms being built mid July 2025 will have the widened and deepened motor slot, and the rear is notched for the pulley. If you do not have this, it will not work! We are offering a replacement right side arm for $100 that has been updated.
These belt systems are meant for street use only. Please be sure to properly tension these belts and recheck them after the first few hard rides to make sure they have not stretched and gotten loose. This kit includes a 26mm wide belt, a 110 or 120 tooth rear pulley, and a 22 tooth motor pulley. Belt brand will vary depending on our stock. These will only work on pit bike wheels that we sell or the same mounting pattern from elsewhere.
