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just had a compression test , good or bad ?

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d-bug
Renault 5 Driver



Joined: 13 Jan 2009
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PostPosted: 18:56 - 16 Jul 2009    Post subject: just had a compression test , good or bad ? Reply with quote
hi i have just had a compression test done on my cagiva mito 1994 im only 200 miles into running it in and the psi reading is 145 !

can any one tell me if this is good or bad ?

cheers d-bug
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lukamon
World Chat Champion



Joined: 18 May 2007
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PostPosted: 23:41 - 16 Jul 2009    Post subject: Reply with quote
very good Thumbs Up
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ms51ves3
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PostPosted: 23:44 - 16 Jul 2009    Post subject: Reply with quote
That sounds superb Thumbs Up
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Coxyzxr
Brolly Dolly



Joined: 22 May 2008
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PostPosted: 00:49 - 17 Jul 2009    Post subject: Reply with quote
BLUEX5 wrote:
Not really convinced about compression tests on 2T's. You can get the result you want by turning it over several times or opening the throttle during the test. Measuring ring gap is the only proper way to measure the wear on a 2T top end.


As in standard ring wear increases the ring end gap measurably?
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iooi
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PostPosted: 05:56 - 17 Jul 2009    Post subject: Reply with quote
BLUEX5 wrote:
Not really convinced about compression tests on 2T's. .


But very useful for finding out if the rings are shot, when you compare a normal reading with a 2nd one with a bit of oil added. Thumbs Up
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d-bug
Renault 5 Driver



Joined: 13 Jan 2009
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PostPosted: 06:57 - 17 Jul 2009    Post subject: Reply with quote
ok cheers for that guys !


d-bug
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Blue_SV650S
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Joined: 27 Nov 2008
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PostPosted: 13:51 - 17 Jul 2009    Post subject: Reply with quote
BLUEX5 wrote:
.. or opening the throttle during the test. .


Shocked But aren't compression tests supposed to always be done at WOT??!! Thinking
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stirlinggaz
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Joined: 22 Jul 2007
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PostPosted: 11:23 - 19 Jul 2009    Post subject: Reply with quote
Blue_SV650S wrote:
BLUEX5 wrote:
.. or opening the throttle during the test. .


Shocked But aren't compression tests supposed to always be done at WOT??!! Thinking

thats what i always thought....
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bladerunner
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PostPosted: 19:36 - 19 Jul 2009    Post subject: Reply with quote
Yes 145 actually sounds a bit on the high side!! But if the motor is set up as std I guess it's just sealing really well

As for doing the test...Always on WOT
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d-bug
Renault 5 Driver



Joined: 13 Jan 2009
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PostPosted: 19:38 - 19 Jul 2009    Post subject: Reply with quote
i dunno how its done as i just put the bloody thing in the garage an let them deal with the things as had enough of the bike , but tomz am having it rejetted .
so in a way i think that a new engine is goin to be on the cards soon Crying or Very sad
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