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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Compression 2001 CR250
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[QUOTE="darringer, post: 837624, member: 26849"] The engine needs to draw in fresh air through the carburetor to get an accurate reading. If the throttle is closed, when the piston tries to draw fresh air/fuel into the cylinder it will create low pressure in the bottom end and will not fill the cylinder completely during the compression stroke. [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Compression 2001 CR250
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