Norfolkluegojnr
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| posted on 24/7/14 at 07:26 PM |
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Compression test - fubar'd?
Right! Borrowed a compression tester to check my rough running cross flow.
1 - 150psi
2 - 125 psi
3 - 150 psi
4 - 150 psi
Am I looking at a rebuild  ?
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teegray19
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| posted on 24/7/14 at 07:36 PM |
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that much wouldn't bother me personally, id look at valve clearances before a rebuild!
did you do the test with WOT?
Built Formular 27 with 1600cc crossflow, 1700cc 0 miles crossflow, Kawasaki ZZR1100
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avagolen
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| posted on 24/7/14 at 07:40 PM |
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Maybe just a 'head job'
easily done in a day 
But, if all the valves lap in easily, maybe you will need to pull the pistons and have a look at them rings.
I used to like working on the 'old engines' nice and simple. 
You could try the compression test 'wet' and see if that changes things, then it could
help assist in the diagnosis without taking the head off.
The Answer for everything, but never the last word....
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Norfolkluegojnr
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| posted on 24/7/14 at 07:46 PM |
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Tested at WOT.
Little oil in no2 and I got 145.
So rings going on no2?
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snapper
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| posted on 24/7/14 at 07:54 PM |
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I'd run it and check again monthly
It's not a massive difference and things tighten up when hot
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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BaileyPerformance
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| posted on 24/7/14 at 08:28 PM |
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Probably tight valve clearances, I would chk them all and retest compression.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Norfolkluegojnr
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| posted on 24/7/14 at 09:01 PM |
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Thanks guys.
Will check valves at the weekend and report back.
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