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Discussion Starter #1
This 50cc 2-stroke engine is now being sold in California. Though you still need a motorcycle licence to ride it.

Some of the features include a belt driven overhead camshaft and one intake valve.

What is the make and model?
 

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Discussion Starter #4 (Edited)
Hi Ninja,

In the head there is only one valve for the intake, no exhaust valve.

There is a second crankshaft that operates a second piston. :eek:

Andy
 

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Discussion Starter #6
The crankcase is a standard 2-stroke, but instead of pushing air/fuel mixture into the cylinder, only fresh air is pushed in.

The revolutionary new design is in the head. There is a tiny crankshaft operated by a belt that operates a small piston, it first sucks in a very rich air/fuel mixture into this small cylinder. It then gets compressed to over 65 PSI. Then a small spring valve (the intake valve) opens up as the main piston is nearing top dead center. Once the air/fuel mixture is ignited the spring valve closes.
 

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Discussion Starter #10
Your prize is a brand new Vespa. The only restriction is that you have to ride it instead of your sportbike. :D

Andy
 
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