Since right from the very start, Stage6 are committed to develop performance-enhancing tuning parts and don't shy away from tackling new tasks. They are getting into the market for geared mopeds / supermotos now, this is a tuning pack for Derbi Euro 2: Tuning Kit cylinder + crankshaft Stage6 BigRacing 77cc Derbi Euro 2. 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) HPC crankshaft original stroke 12mm piston pin Crankshaft bearings and oil seals SKF C3 polymer cages 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.  The exterior is a replica of the original cylinder with a 49cc stamp; don't worry, this is definitely a 77cc cylinder! Attention: For the assembly of this cylinder kit, you have to use longer stud bolts (M7x120mm). Not road-legal.