SSP-G 16x13 QMB139 Roller Weight Tuning Kit

Fine-tune your CVT variator with precision using the SSP-G 16x13 Roller Weight Tuning Kit, designed specifically for 50cc 4-stroke QMB139 engines. Instead of buying individual roller sets one at a time, this all-in-one kit gives you 12 complete weight options — from 3g to 14g — so you can dial in the perfect setup for your riding style and engine configuration.

• Roller diameter: 16mm
• Roller width: 13mm
• Includes 3-piece sets of: 3g, 4g, 5g, 6g, 7g, 8g, 9g, 10g, 11g, 12g, 13g, and 14g rollers (36 rollers total)
• Combine two sets in an alternating pattern to achieve half-gram increments (e.g., 3x 5g + 3x 6g = 5.5g effective weight)
• Designed for tuning and testing — not intended for permanent long-term use
• Compatible with QMB139 50cc/49cc engines and various unlisted makes/models

Important: Rollers must be installed in an alternating pattern. Failure to do so will cause a severe imbalance in the variator. Once your ideal weight is determined, replace it with a full permanent roller set. 

 California Prop 65 Warning: www.p65warnings.ca.gov

• 12 roller weight options from 3g to 14g
• 36 total rollers (3-piece sets per weight)
• 16mm diameter x 13mm width
• Alternating pattern tuning for half-gram increments
• Compatible with QMB139 50cc/49cc 4-stroke engines

Diameter: 16mm | Width: 13mm | Weight Range: 3g–14g | Sets: 12 (3 rollers each) | Total Rollers: 36 | Engine: QMB139 50cc/49cc 4-stroke

QMB139 50cc/49cc 4-stroke — Various makes and models