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Oil Pressure at Idle on KZ1000
- 2wheeltom77
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1979 KZ1000 one off
1982 Honda CX500 (sold)
2008 FXSTC
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- 4TheKZ1000
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- gearheadmm
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- MUCH MORE BOOST..........I mean BRAVO
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General Joeseph Dunford FOR PRESIDENT!!!
69.46.28.106/forum/11-projects/413221-80-kz-1000-st-recycled
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- DiamondSkyBlue1000
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- 2wheeltom77
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1979 KZ1000 one off
1982 Honda CX500 (sold)
2008 FXSTC
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- Motor Head
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- FIX UP YOUR BIKE RIGHT AND CHEAP
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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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- Patton
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2wheeltom77 wrote: Quick question on oil pressure. I have a gauge on my 79 KZ1000. When I'd start it the pressure was always a little above 2 and would hit about 8 or so when I revved it. After a ride today I noticed the pressure sitting at 0 at idle, and went up to 3 when I revved it. The manual says 2.8 at 3000 rpm, which was a relief, but is 0 at idle normal?
Is the oil pressure dash light functional?
And if so, does it stay off at idle?
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1973 Z1
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- 2wheeltom77
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Thanks for the replies.
1979 KZ1000 one off
1982 Honda CX500 (sold)
2008 FXSTC
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- Patton
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Knowing there's activation of the oil pressure switch at idle rpm would indicate at least some oil pressure .
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1973 Z1
KZ900 LTD
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- 2wheeltom77
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Patton wrote: If the oil pressure switch is in position, and potentially functional although not wired into the bike's electrical circuitry, may use an ohmmeter to determine whether the oil pressure switch is being activated by oil pressure at idle rpm, regardless of whether the oil pressure switch is connected to any wires.
Knowing there's activation of the oil pressure switch at idle rpm would indicate at least some oil pressure .
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You know what, that's a damn good idea. I'll give that a shot. Do you happen to know what psi the switch opens/closes?
1979 KZ1000 one off
1982 Honda CX500 (sold)
2008 FXSTC
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- DiamondSkyBlue1000
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- 2wheeltom77
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DiamondSkyBlue1000 wrote: Don't think anyone has mentioned this yet but bear in mind that the KZ engine does not have journal type crank bearings, it has roller bearings. Making a lot of oil pressure at low RPM's is not crucial. Getting a pressure reading denotes flow through the engine.
Yeah, and that was my thinking that the worn out cam bearings would be the only wear component that might cause low pressure, and that's a maybe based on my understanding of oil flow through the engine.
I took about a 30 mile ride this morning. Started out cruising at about 5 psi, then warmed up about 2.5 to 3 at 3000 rpm cruising. By the time I got home pressure was about 2 at 3000, but went up to 3 about 3700 rpm.
I let the motor cool off to about 120 degrees and firing it up. Needle bounced a little at idle and read 3 at 3000.
At this point I'm thinking either the pump is a little worn, or worst case something starting to clog the screen up. If it gets worse after a few more rides, I'll change the oil and filter again. Then I guess it's time to pull the pump.
1979 KZ1000 one off
1982 Honda CX500 (sold)
2008 FXSTC
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