SSP-G QMB139 Stroker Crankshaft 250W Installation Note: Inspect your engine

Installation Note: Inspect your engine pivot bolt and swing arm bearings while the buffers are removed

NIU OEM Parts are the original parts installed when your NIU was new

Very close match to the Genuine Buddy

Length (End to Bend): 9 3/8"

SSP-G QMB139 Stroker Crankshaft 250W Installation Note: Inspect your engine44mm Stroker Crankshaft Assembly for 50cc 4 stroke QMB139 engines. Overall Length: 247mm Thread Size (tapered side): M10x1. 25 Thread Size (spline side): M12x1. 25 Bearing Outer Diameter (tapered side): 42mm Bearing Outer Diameter (spline side): 47mm Number of Splines: 26 Connecting Rod Inner Diameter: 13mm Number of Teeth (oil pump drive gear): 16 (use with 33t oil pump) QMB139 50cc 49cc This product is not intended for use on public roads or land.