cylinder kit Polini aluminum racing 177cc 63mm for Vespa PX, TS, Sprint, LML Star 125-150cc

Newly developed 177cc high-end aluminium racing cylinder kit by Polini for 125/150cc LML Star Deluxe, as well as Vespa PX Vespa Large frame engines. The advanced layout of the transfer ports clearly demonstrates 2-stroke tuning technology from 2015 which is now also available for classic Vespas from 2015 on. Polini is bridging the gap between old & new with this cylinder. The cylinder is supplied with a special cylinder head, which has 2 holes for the spark plug. The spark plug can be mounted with the original or racing position (modification of the cooling cover isrequired). A capping bolt for the 2nd spark plug hole is included. The cylinder head has an extra head gasket and is perfectly centred using fitment pins. Stroke: 57mm. Bore: 63mm. Displacement: 177cc. Material: Aluminum. Warning: In models with electric starters, it is necessary to grind the bottom two fins of the cylinder by approximately 2 mm, so that the sprocket of the flywheel has enough space.