Tuning Cylinder Kit ZT90N Stage 3 (90cc) - for Simson S51, S53, KR51/2 Schwalbe

Tuning Cylinder Kit ZT90N Stage 3 The Stage 3 cylinder is an absolute new development. In order to meet the need for more and more power, while at the same time high mileage and thermal stability, we have decided to use a cylinder with a larger intake flange develop. As a result, we achieve a significant increase in performance without jeopardizing durability by taking measures such as extreme cross-sections in the cylinder or excessive compression. The result of long development time and an investment in a completely new mold is an increase in performance of up to 2PS and 1.5Nm compared to the ZT90N Gen2 Stage 2. The cylinder has a 27mm inlet and can therefore be used with a VM 24 or VM 26 carburetor can be operated. The timing and channel cross-sections were also moderately adjusted. The intake flange was precisely adapted to the VM carburettors, so it is not immediately apparent to the layperson that something has been modified. With adapter plates or membrane conversions, this is usually recognizable at first glance. Features: - Outlet Ø 27mm, inlet Ø 27mm (not suitable for BVF carburetor!) - Inner-centered cylinder head ---> Easy assembly, improved sealing - Maximum heat dissipation thanks to finely radiated surface and coated aluminum bushing - Long shelf life (up to 10,000 km per piston, 4 oversize available) - Unbeatable performance values in the 86cc range - Vmax: 110km/h + - Designed for 44mm stroke - Piston diameter 50mm Power values: - 17 hp with ZT-Reso 2019 (24mm carburetor) - 19.5 hp with ZT-Reso special (24mm carburetor) Scope of delivery: - ZT90N Gen3 Stage 2 cylinder (with 54mm bushing diameter) - ZT90N cylinder head inner centered - ZT90N piston GEN3 (1-ring, 49mm shirt length, 50mm diameter) - carburetor flange gasket - cylinder base gasket 0.3mm - cylinder base gasket 0.5mm - carburetor flange studs - 2 hardened thrust washers