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Ships within 48 hours · Estimated delivery Oct 30 - Nov 4
and other QMB139-powered scooters running a 52mm big bore kit
1 - 58364 Grommet
154FMI 170cc / Stroker 161QMK
**Note: Model versions can be determined based on your 8-digit product ID code
Fine-Tune Your Fuel: 10-Piece Prima 4mm Main Jet Kit
SSP-G A12 Performance Camshaft | GY6 Universal Fit and other QMB139-powered scooters runningYour GY6's stock camshaft is engineered for low RPM smoothness not power. The SSP G A12 Performance Camshaft changes that. With higher lift and longer duration than the stock cam, the A12 holds the intake and exhaust valves open longer and pushes them further, allowing more air and fuel into the cylinder on each stroke. The result is a noticeable increase in mid range and top end power, a stronger pull at higher RPMs, and a more aggressive throttle
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