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HF Comp Tester Reads Low
- Motor Head
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- FIX UP YOUR BIKE RIGHT AND CHEAP
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06 Oct 2011 00:02 #481615
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
HF Comp Tester Reads Low was created by Motor Head
I bought one of these for the adapter fitting, tried it and it read about 20PSI lower than my trusted gauge. Be careful If you buy one, then decide your Motor has Low Compression! get another know good gauge to verify the reading.
www.harborfreight.com/compression-test-kit-66216.html
www.harborfreight.com/compression-test-kit-66216.html
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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- Fritula
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- holly land garage
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24 Dec 2011 16:02 #494551
by Fritula
Replied by Fritula on topic HF Comp Tester Reads Low
nothing is made in USA anymore.
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- loudhvx
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- KZr Legend
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24 Dec 2011 16:23 #494554
by loudhvx
1981 KZ550 D1 gpz.
Kz550 valve train warning.
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Replied by loudhvx on topic HF Comp Tester Reads Low
Do the brass spark-plug adapters each have a check valve in them? If not, there goes the compression.
I've seen other cheap ones without check valves. They always read very low. It's almost as if the person designing it had no idea what they were for or how they should work. :huh:
I've seen other cheap ones without check valves. They always read very low. It's almost as if the person designing it had no idea what they were for or how they should work. :huh:
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- DoubleDub
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24 Dec 2011 17:23 #494561
by DoubleDub
Replied by DoubleDub on topic HF Comp Tester Reads Low
I guess I don't understand - what does the check valve do? Obviously, I don't design these :laugh:
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- andy9802gt
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- If it tastes that good, eat it yourself.
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24 Dec 2011 23:55 #494586
by andy9802gt
I would think it keeps the pressure from bleeding back into the cylinder when you stop cranking it over.
'78 KZ1075 LTD
stage 1 head by Larry Cavanaugh
race built crank by John Pearson
Mikuni rs34's
k410 cams
back cut tranny
8" over D&G swinger
proving once again that age and treachery is better than youth and enthusiasm
Replied by andy9802gt on topic HF Comp Tester Reads Low
DoubleDub wrote: I guess I don't understand - what does the check valve do? Obviously, I don't design these :laugh:
I would think it keeps the pressure from bleeding back into the cylinder when you stop cranking it over.
'78 KZ1075 LTD
stage 1 head by Larry Cavanaugh
race built crank by John Pearson
Mikuni rs34's
k410 cams
back cut tranny
8" over D&G swinger
proving once again that age and treachery is better than youth and enthusiasm
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- steell
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25 Dec 2011 01:30 #494599
by steell
KD9JUR
Replied by steell on topic HF Comp Tester Reads Low
Without a check valve you're basically making the combustion chamber larger, thus lowering compression. With a check valve you're making the chamber larger until the pressures equalize at max psi, at which point you're not pushing any more air into the gauge.
KD9JUR
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