DUM DUM BULLET

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Even looks faster!
 
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Compression test with air filter cover.
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And without.
I wasn't aiming for high compression but did expect a Higher reading than this.
Perhaps the Cam, anyhow I refilled with 95 Ron the bike runs really nice fx set to 7.
 
how does air filter cover have any influence on the compression??
also: you do have a modded head?
 
Let in more air that gets compressed as well?
Head is resized, Ports have been cleaned up and matched to the seats.
Combustion chamber is raised and Valves de shrouded, 2 base gaskets so a bit extra capacity.
Next week I will try to get it up Mt Greenmount in top gear holding the speed limit, couldn't do it last time I tried.
 
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This is how it is fitted for 411, I intend on just making it bigger when I fit the next larger Piston.
 
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