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1992 Kz1000P Sticky black Goo on spark plugs
- hardworkinpd
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Anyway now the bike starts up beautifully. The best it's ever run since I've owned it. BUT after about 10 minutes of run time the tachometer starts jumping around and the idle starts to increase erratically and eventually the bike dies out and won't start until I pull the plugs and clean them. They all have a bunch off black gooey carbon on them, One of the plugs even has gooey chunks on it!
When I had the carbs off I also noticed the intake ports were sticky, I did run some Seafoam through the engine and it cleaned the ports and the combustion chamber up pretty good But the bike is Still having this problem.
I was told by the guy at AtoZone that the plugs are getting too much gas or not completely burning the gas.
Where do I start?
TIA, Kip
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- Patton
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Fuel levels must be within specs as shown by the clear tube test.hardworkinpd wrote: . . . setting the floats. , , plugs are getting too much gas or not completely burning the gas. . . .
If the clear tube test wasn't done, the fuel levels are likely too high, which results in a too rich mixture.
"Float height" is incorrect when producing a too high fuel level.
Good Fortune!
1973 Z1
KZ900 LTD
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- SWest
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- 10 22 2014
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Steve
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- Tyrell Corp
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Attachment download1.jpg not found
Might be a red herring :side: ...electronic tacho needle jumping around can be an ignition coil power supply problem, the tach is triggered by the -ve pulse off either of the coils.
Maybe an ignition related misfire when hot and oil is fouling the plugs? Sticky black goo...oil?
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
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- SWest
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Steve
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Attachment oilsaltech.jpg not found
My 16 valve GSX had dodgy oil seals and used to smoke a lot when cold and unused for a few days, but it used to clear it's throat quite quickly once warmed. Kip, are you getting much blue smoke out of the exhaust?
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
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- hardworkinpd
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Adios, Kip
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- hardworkinpd
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Adios, Kip
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- hardworkinpd
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Adios, Kip
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- hardworkinpd
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Tired, thirsty, smelly, hungry, broke, and neglected a sh!t load of stuff.
And the ole lady's pissed that I'm taking up space in the garage and one of the cars stays out in the driveway!
At least I'm not in jail or the hospital.
I'm going to have a refried bean sandwich and some beers and hopefully a shower if I don't fall asleep (I'm covered in sweat, gas, brake cleaner and exhaust).
Talk to you guys later, Kip
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- jackleberry
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Tuning the idle mixtures won't cure your leaking valve seals, but if you can get it right and you avoid short (< 10 minute) trips, the leaking seals won't foul your plugs.
Checking the fuel height with the clear tube test would at least tell you if any of the float valves are leaking badly.
To quickly and cheaply renew your fouled plugs, hold the electrodes over a blow torch flame until red hot for a while. That'll burn off the hydrocarbons and burn much of the carbon into ash which can be brushed away. Let them cool completely before reinstalling.
1997 KZ1000P (P16)
2001 KZ1000P (P20)
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- hardworkinpd
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Can I do the clear tube test with the carbs on the bike?
Also the tachometer needle jumping around once the bike warms up what's up with that?
Adios, Kip
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