If you are looking for reliability but above all power, here is the cylinder kit you need: The STAGE6 Streetrace has launched 88cc for DERBI Euro3 / DERBI Euro4. Designed in cast iron, this StreetRace STAGE6 cylinder kit that perfectly combines reliability and performance, will accompany you during your daily excursions on the handlebars of your bike. With a displacement of 88 cc thanks to its 50 mm piston and 45mm stroke - 90mm connecting rod, it must be mounted with a long-stroke crankshaft! To take full advantage of the performance of this high engine, it is recommended to combine it with at least one 26 mm carburetor, a Racing range exhaust and a reinforced clutch. Mounting the cylinder kit is very simple and does not require any milling of the base. As for burglary, a minimum of 300 km with a 3% oil mixture will ensure robustness and durability. Note: the outer mold is based on a replica of the original cylinder, it has the annotation "49.9cc". But we want to reassure you, it's really an 88 cc!