Universal Parts GY6 Starter Motor Genuine-OEM Performance Variator & Drive Face:

Performance Variator & Drive Face: Optimized roller ramp angles maximize belt travel for improved acceleration and high-end speed

* Euro2 Derbi GP1 50 Open 2006-2009 () with chain drive

Tech Tip: If you have recently installed a Big Bore Kit and your starter sounds "sluggish

Includes bearing seat ring and loose ball bearings

If a non-stock cylinder kit is fitted to your engine

Universal Parts GY6 Starter Motor Genuine-OEM Performance Variator & Drive Face:This Universal Parts starter motor fits 4 stroke GY6 and ZNEN engines. Specifications: Number of Splines: 9 Bolt Hole Spacing: 79mm Shaft Length: 18mm Shaft Diameter: 11. 25mm Diameter (near o ring): 30mm Includes wire Compatibility: 4 stroke GY6 and ZNEN engines and those below: 157QMJ based 125cc 150cc 169cc engines with the following engine codes: 157QMJ 161QMK 152QMI 1P61QMK YN1P57QMJ 1P52FMI 154FMI JJ157QMJ 1P57QMJ BN157QMJ BN161QMK A Other QMJ,