If your GY6 feels sluggish off the line or inconsistent when you’re on throttle, that’s the CVT showing its limits. This kit takes the guesswork out of dialing in the transmission — everything is matched to work together so you get smoother acceleration, stronger takeoff, and a powerband that actually feels usable. No piecing parts together, no tuning headache.
The Details
This is our **#2 choice** performance CVT kit for GY6 125cc–232cc engines — recommended for riders who want big gains but prefer a quieter clutch engagement, or for **buggy/kart builds** where the weight of the vehicle changes how the clutch behaves. If you don’t want the signature chatter of the Reveno clutch, this is your setup.
What Makes This Kit Work
TFC Forged Clutch — strong, stable, can take heat and abuse
TFC Clutch Bell — resists warping + keeps consistent grab
Reveno Performance Contra Spring for stronger belt grip
ProBld Spring Bearing for smoother shifting progression
Premium CVT Belt — long case or short case options
ProBld Performance Variator with lightweight fan drive face
Includes 10g, 11g, and 12g rollers for dialing response
Titanium variator nut + washers included
Pulley Options
Use your current pulley — works fine if in good condition
The goal here is simple: **install and ride.** The juggling of variators, rollers, springs, ramp angles, bell weight, and clutch bite is already done for you.
Important Things to Note
This kit fits **QMJ157 / QMK161 / QML161** GY6 engines.
If your scooter has **12" wheels**, you most likely need a **long case belt** (835-20-30 or 842-20-30).
If your GY6 has a **shift lever** or **10" wheels**, it is a **short case** setup.
This is the recommended kit for **buggy / kart** builds (better behavior than Reveno clutch).
