cylinder kit AIRSAL Sport 81.3cc 50mm 139QMB GY6 50cc Kymco 50 4-stroke

81.3cc high-performance aluminium cylinder kit from Airsal for 50cc 139QM GY6 engines.
Unlike cast iron cylinders, the aluminium cylinder offers much better heat dissipation, making these kits less susceptible to wear or piston failure.
Much-improved performance at lower engine speeds and, all in all, a very good-quality kit.
Supplied as shown in the image with barrel, piston, ring, pin, clips and required gasket. The original head can be used.
Notice:
Due to the fact that the outer diameter of the cylinder is 54mm, in some rare cases the opening on the crankcase needs to be modified slightly to create enough mounting space. By purchasing this item, you should be prepared in case this is required.
Please note: For Sym scooters, this kit is only suitable for the GY6 139QMB engine version and not the XS1P139QMB, AV05W or AW05W engines or Sym Symply 2 models

50mm 139QMB, GY6 50cc, Kymco 50 4-stroke