fouling plugs, 95 900rr - Honda Motorcycles - FireBlades.org
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post #1 of 3 Old 05-16-2010, 8:28 AM Thread Starter
 
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fouling plugs, 95 900rr

hey guys, i need some advice with my blade. i keep fouling up all four plugs. i've looked at just about everything other than the carby adjustment screws, and was hoping to avoid changing the settings because, even though its running really fat, it hasnt got a flat spot in it. the fuelling is magnificent all the way from 2 grand to redline.

the problem is i will drop one cylinder about once a week. when this happens i pull her apart clean the black crap (fuel) off the spark plugs, put it all back together and away we go again, like it never happened. then about a week later, they get dirty again, and the process repeats.

so i figure its time to start taking a bit of fuel out of the mix. i've only got the 96 manual and even though it appears to be similar, i cant see the pics properly anyway. can anyone point me in the right direction with adjusting the carbs please?

cheers
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post #2 of 3 Old 05-16-2010, 11:08 AM
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Re: fouling plugs, 95 900rr

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Originally Posted by diggercbr View Post
hey guys, i need some advice with my blade. i keep fouling up all four plugs. i've looked at just about everything other than the carby adjustment screws, and was hoping to avoid changing the settings because, even though its running really fat, it hasnt got a flat spot in it. the fuelling is magnificent all the way from 2 grand to redline.

the problem is i will drop one cylinder about once a week. when this happens i pull her apart clean the black crap (fuel) off the spark plugs, put it all back together and away we go again, like it never happened. then about a week later, they get dirty again, and the process repeats.

so i figure its time to start taking a bit of fuel out of the mix. i've only got the 96 manual and even though it appears to be similar, i cant see the pics properly anyway. can anyone point me in the right direction with adjusting the carbs please?

cheers
How many kilometers on the engine?
Stock muffler?
Clean airfilter?
Are the plugs the correct heat range?
Is it burning any oil?
I'd be investigating the fuel supply before making carb adjustments.
If you bypass the fuel pump and run the bike off gravity feed is it any different?
What's your fuel economy like?
Is the fuel tap vacuum operated?
If all that is good then I'd pull the carbs, clean them thoroughly and check the float needles are good. New needles and seats are never a bad thing. If the seats are sealed with o-rings, replace though as well.

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
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post #3 of 3 Old 05-16-2010, 5:36 PM Thread Starter
 
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Re: fouling plugs, 95 900rr

hey thanks for the reply. i wondered about the fuel pump actually, but wasnt sure as i dont know the in's and outs of how the feed works on it. will have a look.

78000kms, air filter is used, but not filthy, plugs are cr9eh9's, which is correct from what i understand, muffler is aftermarket but i apart from black plugs, i assumed it was working ok due to the fuelling feeling so nice. it has a tiny drop of oil on the spark plug threads most of the time, no biggie i think and fuel economy seems ok. bout 210kms till reserve time. iv'e also had the carbs off and the floats are all within spec.

thanks for your help so far too, this is driving me nuckin futs
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