Compression

H

Heartattack_3

Member

Mar 1, 2009

12

0

• Mar 24, 2009

• #1

How much compression should a 95 YZ250 have just rebuilt it and it just dont seem right. Whem trying to start to it just makes like a spuff out of the exaust but does not start it was running fine yesturday and even started up this morning and when it died I let it sit for awhile and it started again let is sit again for about an hour and still does the same thing any suggestions thanks for your time.

 

IndyMX

Crash Test Dummy

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Jul 18, 2006

5,548

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Amo, IN

• Mar 24, 2009

• #2

What are you getting on your compression tester?

 

H

Heartattack_3

Member

Mar 1, 2009

12

0

• Mar 24, 2009

• Thread starter
• #3

after kicking it over about 5 times with tester conected getting right at 180 lbs per square inch

 

IndyMX

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Jul 18, 2006

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Amo, IN

• Mar 24, 2009

• #4

Doesn't sound too bad.. What kind of numbers were you expecting?

 

H

Heartattack_3

Member

Mar 1, 2009

12

0

• Mar 24, 2009

• Thread starter
• #5

Well I wasn't to sure untill I tested it it just seemed week but I have scence found the problem the proplem the timeing had went way off but i really thank you for looking thanks again

 

IndyMX

Crash Test Dummy

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Jul 18, 2006

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Amo, IN

• Mar 24, 2009

• #6

No problem at all.. That's what we're here for!

 

H

hot125mod

Member

Jan 14, 2007

501

0

• Mar 24, 2009

• #7

thats right about what a 250 is supposed to be. A buck 25 is about 160, shoot my old 125 was 190 kicked like it too wow

 

G

GarbatyA4

Member

Sep 4, 2008

110

0

• Mar 27, 2009

• #8

I checked my compression when it was 0deg celsius in the garage and I got 190PSI w/ 15 hours on the rebuild.

So as it gets warmer, you get better comp right? :)