Compression Test 250F

NJKawi913
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NJKawi913
What kind of compression reading should I look for in a 2018 KX250F with 50 hours on it. I just did a test and got 80 psi on average cold, and 100 psi average when warm (tested 3 times each). Should I replace the top end now, some people are telling me 100 is fine, others saying i should see 120 the least.
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kb228
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kb228 2/7/2022 5:01am
2/7/2022 5:01am
With auto decompression built into the exhaust cam it could be as low as 60psi and still be fine. A leak down test is going to give you more info
NJKawi913
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Somerset, NJ US
NJKawi913 2/7/2022 5:19am
2/7/2022 5:19am
kb228 wrote:
With auto decompression built into the exhaust cam it could be as low as 60psi and still be fine. A leak down test is going to...
With auto decompression built into the exhaust cam it could be as low as 60psi and still be fine. A leak down test is going to give you more info
I don't have a leakdown tester. You know anywhere that will rent them like autozone.
murph783
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murph783 2/7/2022 5:49am
2/7/2022 5:49am
kb228 wrote:
With auto decompression built into the exhaust cam it could be as low as 60psi and still be fine. A leak down test is going to...
With auto decompression built into the exhaust cam it could be as low as 60psi and still be fine. A leak down test is going to give you more info
NJKawi913 wrote:
I don't have a leakdown tester. You know anywhere that will rent them like autozone.
You can pick one up pretty cheap on Amazon. It’s a worthwhile investment
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