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Author Topic: Testing compression  (Read 3643 times)

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Offline donnieray

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Testing compression
« on: July 24, 2010, 08:10:14 AM »
Hi, Im wondering about how many times kicking for a compression test, 10 kicks gives me about 110 on my 02 kx 125, I know spec is 180. any help?
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Motorrad

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Re: Testing compression
« Reply #1 on: July 24, 2010, 08:21:20 AM »
Did you have the throttle wide open when you kicked it?
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Offline donnieray

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Re: Testing compression
« Reply #2 on: July 24, 2010, 09:07:05 AM »
No, i will try again with wot! thanks.
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Offline donnieray

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Re: Testing compression
« Reply #3 on: July 24, 2010, 09:10:32 AM »
How many kicks do you reccomend?
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Offline ThrottleJunky

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Re: Testing compression
« Reply #4 on: July 24, 2010, 09:17:50 AM »
Also,  for accurate data, be certain the cylinder is lubricated .  If it was recently running - O.K.,   if  it was apart or sitting up for a long time - spray or squirt a small amount of lubrication in the cylinder, then recheck
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'There's more living in five minutes flat-out on a bike than some men have in an entire life'.

Offline donnieray

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Re: Testing compression
« Reply #5 on: July 24, 2010, 09:56:06 AM »
Been track and trail riding weekends just a bit worried, hadnt had the kx long and dont know when was the last rebuild. The bike looks new!
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Offline Coop

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Re: Testing compression
« Reply #6 on: July 24, 2010, 11:38:15 AM »
No certain number of kicks. Hold the kill switch down, hold the throttle wide open, and kick until the needle stops. Do it to 3 times and average your results.
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"Twenty years from now, you will be more disappointed by the things that you didn't do than by the ones you did do"- Mark Twain

1997 CR80RB, 1993 KX60, 1988 KX125

Offline BDI

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Re: Testing compression
« Reply #7 on: July 24, 2010, 01:23:05 PM »
Quote from: donnieray on July 24, 2010, 09:56:06 AM
Been track and trail riding weekends just a bit worried, hadnt had the kx long and dont know when was the last rebuild. The bike looks new!
Put a new top end on it then. Skirts of stock pistons can show cracks in as little as twenty hours. Just because it has good comp does not mean it does not have cracks. If I was the type of person to worrie about that type of stuff I would put a new piston and rings in it and an hour meter, then start counting hours.
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Smoke every cigarette like It's your last and ride like you stole something!!!

Offline donnieray

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Re: Testing compression
« Reply #8 on: July 24, 2010, 02:31:02 PM »
Thanks for the advice guys, top end is ordered, lookin for an hour meter now!
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