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Dirt Bike Brands - Other
Compression ratio Q!!!
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[QUOTE="vallely, post: 1117222, member: 73438"] Hello, I am new here and I have a question about the compression ratio on my recently acquired 1981 cr450r. Now I know that this bike has been labeled one of the worst bikes, but im just using it for fields and as ,and to get aquainted with bikes. Now let me get to the point. My CLYMER manual says the compression ratio is (7.1:1). Does this mean that it is 7.1 bar to 1 bar or 7.1 atmospheres to 1 atmopshere of pressure. If it does then that would make the psi inside the cylinder at around 100-110 psi on a good engine. I put the compression tester on my bike and kicked it at WOT and The readings were right around 110 or a little above 110 psi. Does this mean that my engine is properly sealing for comprssion? If I have all of this totally screwed up then please tell me..and set me straight. Also if you know of what a cr450r should be reading for pressure please post it here. I thank you for your time and hope that you can help me out here!!! -Rob [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Compression ratio Q!!!
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