Ruima Crankshaft +2.5mm Stroker (GY6)

Description: Ruima high-performance stroker crank for GY6, Buddy 150, and Blur 150. Increases standard 57.8mm stroke by 2.5mm. More displacement equals more power!

Temperature Modification May Be Required: You'll need to heat the aluminum crankcase area where the Ruima Crankshaft bearing side will be placed, in order to immediately fit the frozen crankshaft bearing, seating flush in place. Users assume full responsibility and risk doing so using this Ruima Crankshaft.

Specifications:

Include the following Crankshaft stroker.

•    1x Crankshaft L: 285mm / Stroke L: 57.8mm +2.5mm (2500-micron) = 60.3mm
•    1x Piston Wrist Pin Slot ID: 15mm
•    1x Flywheel Shaft Thread: M12 x 16mm
•    1x Flywheel Shaft Bearing: 56mm x 22mm x 15mm
•    1x Variator Shaft Thread: M12 x 16mm
•    1x Variator Shaft Splines: 19
•    1x Variator Shaft Bearing: 56mm x 22mm x 15mm
•    1x Made in Taiwan
•    Fit Intake Studs: M6 / Nuts: M6 / Socket: 8mm
•    Fit Exhaust Studs: M8 / Nuts: M8 / Socket: 10mm
•    Fit Flywheel/Variator Shaft Nuts: M12 / Washers: M12 / Socket: 17mm
•    Fit Starter Clutch / Nut: M22 / Washer: M22 / Castle Socket: 28.7<37.6mm
•    Fit Cylinder Studs: 187.5mm 195.5mm 2V / Nuts: M8 / Washers: M8 / Socket: 12mm
•    Fit 54mm Stud Spacing (A-Block)
•    Fit 57mm Stud Spacing (B-Block)
•    Fit Dowel Pin Set (8x14mm)
•    Fit Dowel Pin Set (10x14mm)
•    Fit Woodruff Keys
•    Fit GY6 125/150cc+
•    Optional: cut plastic fan shroud for best fitment

Supported Models: GY6 152QMI 157QMJ 161QMK 161QML Chinese Scooter, ATV, Genuine Buddy, Kymco, Ruckus, Vento

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Item Weight & Product Dimensions:
•    6.4 pounds | 11.5" (L) x 5.25" (W) x 4.75" (H)