Unlike the 47 mm Metrakit racing kit, this cylinder has a straight exhaust port, allowing all Puch exhaust systems to be installed without limitations! The housing does not need to be machined, the cylinder fits all E50 housings without the need to bore out the cylinder base!!
An excellently crafted cylinder head is included in the kit, of course, 1-ring pistons and gaskets are also included. This is a high-compression (HC) head, which can achieve excellent performance. The cylinder has an oval intake, 4 transfer ports (128°) and an oval exhaust (175°).
Straight exhaust, the engine housing does NOT need to be machined!
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