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Compression How Much

This is a discussion on Compression How Much within the Yamaha YFZ450/450R (2004-Present) forums, part of the Performance /Technical category; How much compression should the YFZ have om...

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Old 02-10-2005, 09:35 PM   #1
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Default Compression How Much

How much compression should the YFZ have

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Old 02-11-2005, 04:13 AM   #2
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Yfz 470. Hot cams, Vortex cdi, Sparks, Peps, Power now, Lsr (axle, stem & lt arms), renthal, A/C pro peg nerfs & bumper, dampener. K/N, klaws, douglass beads, ASV levers, Jet4power. Tucker Swinger.
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Old 02-11-2005, 04:43 AM   #3
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Quote: Originally Posted by Aussiequadrider

hes talking about "kicking compression" the compression (psi) the motor shows when doing a compression test. sorry i dont know the answer
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Old 02-13-2005, 02:20 AM   #4
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Last I heard you cannot properly check the compression, because it has an auto-decompression which aids in starting. Best to do a leak down test, its better anyways since you can pinpoint any problems a little easier.
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