Stage6 Streetrace 70cc cylinder kit for Piaggio/ Gilera/ Vespa 50cc 2-stroke air-cooled engines.
With the 70cc Streetrace grey cast iron cylinder series, Stage6 offer a bargain version of the popular Sport Pro Aluminium cylinder; the transfer port layout has been adopted from the high-performing Stage 6 70cc Sport Pro and slightly modified in order to fulfil the thermal demands of the cast iron cylinder.
The performance characteristics of the Streetrace mainly correspond to those of the Stage 6 Sport Pro; a bit more power when accelerating coupled with 0.5 hp less peak power but with slightly higher low down torque (wheelie power!). The ideal rpm range for the Stage6 Streetrace kit is around 10,000 rpm. It is recommendable to use a 70cc sport exhaust system with an up-rated crankshaft. When it comes to looks, the cylinder is unobtrusive and similar to the stock part.
The oil pump may be used with this kit although a high quality 100% synthetic oil is required.
Included: cylinder, cylinder head, gasket set & piston kit.
Recommended spark plug: NGK BR9ES
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