Compression Test. How much? - Suzuki ATV Forum
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post #1 of 9 Old 11-16-2018, 08:06 AM Thread Starter
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Compression Test. How much?

I have a 1999 king quad 300. I want to do a compression test. Does anyone have access to a manual to see what the specs are. I’m guessing 130-140. But need help confirming what the range is. Thanks!
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post #2 of 9 Old 11-16-2018, 10:37 AM
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normal....142-199
min of 114

2002 King Quad 300
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post #3 of 9 Old 11-17-2018, 04:06 PM Thread Starter
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Just tested and got about 162. I did the test with the engine cold. Does it make any difference if it is tested after the engine has been warmed up?
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post #4 of 9 Old 11-17-2018, 06:45 PM
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Compression Test. How much?

Just making sure. But make sure you are testing holding the throttle wide open.


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post #5 of 9 Old 11-17-2018, 08:35 PM Thread Starter
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Thank you. Yes. I did do it with the throttle wide open. I read somewhere that is what you want to do. Thanks.
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post #6 of 9 Old 11-18-2018, 08:51 PM
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Sounds like you do not have a problem to me.

2002 King Quad 300
2001 King Quad 300
1997 King Quad 300
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2008 Kawasaki 250 Bayou 2x4
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post #7 of 9 Old 11-20-2018, 06:28 PM Thread Starter
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Thanks for your help fellas.
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post #8 of 9 Old 12-02-2018, 10:26 AM Thread Starter
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Update. So I decided to check the compression after the engine was warmed up and hot. Compression was 135. A few weeks ago when I originally checked it when the engine was cold the compression was 165. Is it normal for the compression to decrease after the motor was warmed up? What’s the true compression?
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post #9 of 9 Old 12-09-2018, 11:42 PM
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Quote:
Originally Posted by Tho98027 View Post
Update. So I decided to check the compression after the engine was warmed up and hot. Compression was 135. A few weeks ago when I originally checked it when the engine was cold the compression was 165. Is it normal for the compression to decrease after the motor was warmed up? Whats the true compression?
Yes. I know on snowmobiles compression goes down when warmed up.

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