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Old 05-24-2012, 02:09 PM   #1
ssregal39 OP
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Joined: Jan 2008
Location: Virginia Beach
Oddometer: 198
compression test ktm 300 2001

i have forgoten have many times to kick a 2 stroke for compression test.
anyway, on a cold motor, i kicked 6 good times and got 175. seems ok to me.
what do the other 2 smokers think?
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Old 05-24-2012, 03:11 PM   #2
Reino
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Oddometer: 205
I am assuming that is psi, but according to my limited knowledge base i would say that is reasonable.



A 300 should get around 200 - 210 psi on a fresh top end. Minimum acceptable compression is generally about 150 psi.
http://www.dirtbikeworld.net/forum/a...p/t-40434.html (12th post from top)

proper pressure after 5 kicks should be in the 175-190 psi range on fresh top end for that bike.
http://answers.yahoo.com/question/in...0062714AAfJjoe

A 300 will run with 120 but not well. Start saving for a top end. If you let it go too long you will need to replate the cylinder.
http://boardreader.com/thread/05_300..._d89Xl3gb.html

what model is your bike? (sx, xc, xc-w or an exc)

And remember Google is your friend.
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Old 05-25-2012, 09:52 PM   #3
ssregal39 OP
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thanks. it's an exc. the motor should be fine for a while i think.
now i just need to sort the jetting.
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Old 05-26-2012, 01:21 AM   #4
Reino
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Same here on the jetting, good luck with the bike i hope you get every thing sorted.
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