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Author Topic: XT500 compression testing spec's?  (Read 2561 times)

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dave

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XT500 compression testing spec's?
« on: July 23, 2009, 06:35:48 pm »
Could anyone please give me the spec's for a compression test of an XT500, in p.s.i please.
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Offline brent j

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Re: XT500 compression testing spec's?
« Reply #1 on: July 23, 2009, 10:41:48 pm »
My manual says,

9.5-10.5kg/cm2 or 135-149lbs/in2 at kick starting.

It doesn't say how many time you should kick it though, I usually kick it til the needle stops rising.

hth

Brent
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Offline TT5 Matt

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Re: XT500 compression testing spec's?
« Reply #2 on: July 23, 2009, 11:18:28 pm »
and at wot [wide open throttle] with the motor at running temp
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Offline brent j

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Re: XT500 compression testing spec's?
« Reply #3 on: July 23, 2009, 11:24:13 pm »
yeah good point
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dave

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Re: XT500 compression testing spec's?
« Reply #4 on: July 24, 2009, 07:06:01 am »
Oh so 55psi probably isn't real crash hot  :-\
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Offline brent j

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Re: XT500 compression testing spec's?
« Reply #5 on: July 24, 2009, 01:00:18 pm »
A bit on the low side yeah..............

Try some oil in through the spark plug hole then test it again, if the compression improves it's most likely rings.

Check your valve clearances and the decomp lever is free.

How well or badly does it run does it run?
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dave

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Re: XT500 compression testing spec's?
« Reply #6 on: July 24, 2009, 01:18:22 pm »
It ran ok several months ago but not brilliantly. Didn't blow lots of blue smoke. It has been sitting for a while. Hey Brent 55psi was after the oil went in mate  ::)
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Offline brent j

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Re: XT500 compression testing spec's?
« Reply #7 on: July 24, 2009, 02:56:07 pm »
Oh...............
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dave

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Re: XT500 compression testing spec's?
« Reply #8 on: July 24, 2009, 04:25:46 pm »
Hey Brent thanks for the spec's, looks like I'll be doing a teardown this weekend. Cheers digger
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