Blue Line Complete Cylinder Kit (39mm); 139QMB glovebox rubber so you've got to switch

so you've got to switch it up to make higher revs

This is slightliy larger than the originals so should be replaced in pairs for maximum aesthetic pleasure

Elite 50 (2T) Universal Any other 2-stroke engine (premix or injected) Technical Specifications

RPM Rating: 1500 RPM

Includes: Bearing seat ring

Blue Line Complete Cylinder Kit (39mm); 139QMB glovebox rubber so you've got to switchThis Blue Line OEM cylinder kit fits bikes running 50cc 4 stroke 139QMB engines. The kit includes cylinder, piston, pin, circlips, rings, head gasket and base gasket. Original Parts For Scooters SKU 151 257 Specifications: Bore: 39mm Overall Height: 70mm Cylinder Sleeve Outer Diameter: 44. 7mm Compatibility: 139QMB based 50cc 80cc engines with the following engine codes: 139QMA 139QMB 1P39QMB 1P39QMA 2 YN139QMB JJ1P39QMB 139FMA 2 BD1P39QMB BN139QMB