Hi all !
My break-in is finally finished, the bike is running strong but one problem still remains. It eats through plugs like crazy.
Currently, a plug has an expectancy of life of about an hour. I use the plug recommended by Kawi (B9ES), fuel is at 20:1 (recommended by kawi). My carb is stock jetting and a Mikuni VM34SS. When I take out the worn plug, it's mainly black of carbon and not chocolate brown like it is supposed to. As soon as I put a new plug in, the bike will start right away.
Any ideas ?
Break-in finished
- Actarus
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Break-in finished
1981 KDX 175
- Indawoods
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OMG!
Try a B-8ES and try 32:1
Try a B-8ES and try 32:1
*** Administrator //***
****'95 KDX 200/****
"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "
****'95 KDX 200/****
"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "
- Colorado Mike
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32:1 is recommended for the newer bikes (I run 40:1), not 20:1. Stock jetting is usually too rich. My bike came with an 8, not 9 for the plug. The new bikes come with a Keihin carb, not Mikuni, which makes me think your bike is old. Other than that, sounds like you are right on it.
Mike
Life's tough, it's even tougher if you're stupid.
'04 KDX220
Life's tough, it's even tougher if you're stupid.
'04 KDX220
- m0rie
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On an 81 175 I don't really have much of an idea but you could start by bumping the mixture to 32:1 or 40:1 since your using modern premix. With the motor being aircooled i'd keep the b9es for the moment and see if adjusting the mixture keeps it from eating the plugs. If not i'd try one step hotter on the plug and work with the jetting a bit.
1989 KDX 200
2007 TTR-50E
2007 TTR-50E
- canyncarvr
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'My carb is stock jetting'
Chances of that being correct are slim to none.
IMO...DO run the plug that is spec'd, not a different range to mask jet-reading tell-tales.
20:1? That's in the book?
That's chain-saw mix!
Changing to (example) 32:1 from 20:1 will richen the air/fuel ratio. If you're having plug problems now due to overrich, that change will make it worse.
Chances of that being correct are slim to none.
IMO...DO run the plug that is spec'd, not a different range to mask jet-reading tell-tales.
20:1? That's in the book?
That's chain-saw mix!
Changing to (example) 32:1 from 20:1 will richen the air/fuel ratio. If you're having plug problems now due to overrich, that change will make it worse.
Consider the source
Using a perceived level of knowledge to boost my self worth.
Non impediti ratione cogitationis
bike profile: !clicky!
- Actarus
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