The StreetRace cylinder offers Stage6 a cost-effective alternative to their ProSport cylinder. The design is based on the 70cc ProSport cylinder, but with some modifications to compensate for the poorer heat dissipation properties of cast iron.
Engine performance is similar to that of the SportPro cylinder, with slightly higher torque but about 0.5 horsepower less peak power. The cylinder revs up to 10,000 rpm , and a sports exhaust system like the Leovince TT is highly recommended to maximize performance.
Specifications:
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Bore : 40.00 mm
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Stroke : 39.2 mm
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Displacement : 49.26 cc
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Piston diameter : 39.95 mm
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Piston pin : 10 mm
- Recommended needle bearing width : 10x??x15 mm (?? = connecting rod inner diameter)