Benzo
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| posted on 28/6/11 at 04:11 PM |
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Fireblade Compression test..
Any of you guys got any idea what a compression test should read on a healthy 919 Fireblade engine?
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brookie
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| posted on 28/6/11 at 05:24 PM |
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i did thid about 2/3 months ago may be wrong about 170? like i said could be wrong
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Benzo
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| posted on 28/6/11 at 06:33 PM |
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I had been told over 150.. But wanted to check to be sure!
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Benzo
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| posted on 29/6/11 at 06:15 PM |
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Can anyone tell me the process of doing a compression check properly?
Can i compression check with the carbs & exhaust etc off the engine?
Should i leave in all plugs other than the cylinder i am checking? or is it ok to check it with all the plugs out?
Not really too sure what im at here...
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coozer
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| posted on 29/6/11 at 06:17 PM |
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All the plugs out and the carbs/TB's wide open. Healthy battery and crank crank crank until it is stable.
1972 V8 Jago
1980 Z750
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Benzo
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| posted on 29/6/11 at 06:20 PM |
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ok in that case my rings must be beat, running 65psi/70psi across all cylinders..
That heating it got at the weekend must have fucked things 
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a4gom
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| posted on 1/7/11 at 08:07 AM |
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I'd borrow someone else's to check before you start ripping things apart if you're worried about the numbers. I have a fairly cheap
one and it never gives the figures qouted in the manuals. If your getting a reasonably equal figure accross all cylinders and you have no lack of oil
pressure / power and no signs of excessive oil in the exhaust I wouldn't worry too much.
If the figures are low put a little bit of oil in the bores before you test it and see if the figure rises.
Andy
Perfect planning prevents pi$$ poor performance!
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