These Dr. Pulley 23x18 Round Roller Weights (SKU 169-252, MPN RR2318) let you fine-tune the CVT on 250cc and 300cc liquid-cooled scooters, go-karts, and buggies. Made from Dr. Pulley's low-friction composite, they resist heat and wear better than standard nylon rollers and give smooth, consistent variator shifting across the powerband. Sold as a matched set of six in 18g, 22g, 24g, or 26g.
| Brand / Engine Family |
Models and Engine Platforms |
| Honda |
Helix (CN250), Elite 250 (CH250), Reflex (NSS250), Big Ruckus (PS250), Foresight 250, Forza 250 |
| KYMCO |
People 250 / 250S / 300i, Xciting 250 / 300, Bet & Win 250, Grand Vista 250, Yager GT 300i |
| CFMoto / 172mm engines |
V3 (CF250T-3), V5 (CF250T-5), Fashion 250, Glory 250, and liquid-cooled 172mm 4-stroke engines |
| 250cc buggies and go-karts |
Hammerhead SS 250 / GTS 250, Joyner 250, TrailMaster 250, Roketa 250, BMS 250, SunL 250 |
Roller size and count can vary by model year, so pull one of your original rollers and confirm it measures 23mm x 18mm, and that your variator takes six, before ordering.
Roller Weight Tuning Guide
Going lighter than your current rollers raises engine RPM for quicker launches and better hill climbing. Going heavier lowers cruising RPM for smoother, more relaxed riding and a higher top speed. Most riders change 2g to 4g at a time and test from there.
Installation Notes
Make sure the variator ramps and center boss are clean and dry before installing. Use brake cleaner and a lint-free towel to remove belt dust. Do not grease the rollers; Dr. Pulley composite rollers are designed to run dry.
