Stage6 Big Racing 77cc Derbi (nuo 2006 metų) cilindro komplektas

The cylinder kit includes: 77cc cylinder, aluminium, 50mm bore, with 5 transfer ports and 32mm bridged exhaust port 1-ring Vertex piston, d. 50mm high compression cylinder head, monobloc, aluminium gasket set (base and head gaskets) The cylinder was developed in close cooperation with the MXS Racing experts; by benefitting from their considerable experience of gearshift mopeds and drawing from their own extensive technical know-how, Stage6 was able to design a thoroughly convincing new tuning cylinder. The cylinder features a rather basic and inconspicuous exterior, but we all know that appearances can be deceptive. We're talking genuine ""Big Bore"" here – cylinder layout is not based on a modified standard model that was milled open to create a bigger bore, but was designed as a Big Bore right from the start, with matching transfer ports and a bridged exhaust port big enough to support the excess performance. The BigRacing cylinders impress with ease of installation, outstanding performance, and high reliability. - Installation is very easy, crankcase milling or any other modification are not necessary. Squish clearance is pre-set to a value optimized for the respective engine type. - In terms of output, the BigRacing cylinders knock it out of the ballpark: we measured a whopping 23 PS and 13 Nm on our P4 test bench using a standard set-up (24mm carburetor, original ignition, racing exhaust etc.). - Port timings are relatively low, cooling system volume is quite large and the piston is a top quality Vertex piston. All of these factors contribute to the cylinder's high dependability and robustness, provided that set-up and adjustments are appropriate. Displacement is 77cc (50mm piston) and is accordingly not street-legal (in many countries). We strongly recommend a reinforced crankshaft with standard stroke. The exterior is a replica of the original cylinder with a 49cc stamp; don't worry, this is definitely a 77cc cylinder! Note: we recommend to use ""long"" cylinder head nuts to achieve correct torque when tightening the bolts.