Proper 4 stroke plug coloration
Apr 25, 2004 | 02:18 PM
#11
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Proper 4 stroke plug coloration
Actually, its funny you mentioned the moon. Last night I built this jump, I hit it a tad to fast and well...ummm...your not going to believe this. I jumped so high I hit the moon. I know I know, you don't believe me but next time you see Santa Clause ask him about it. Thats where he hides in the summer.
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Apr 25, 2004 | 08:37 PM
#13
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Proper 4 stroke plug coloration
Plug color wont tell you much unless your jetting is way off.
Todays gas has no lead and burns very clean. The best way to jet a bike/atv is with a dino that shows the fuel curve vs rpm and load..
Todays gas has no lead and burns very clean. The best way to jet a bike/atv is with a dino that shows the fuel curve vs rpm and load..
Apr 25, 2004 | 08:54 PM
#14
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Proper 4 stroke plug coloration
More brown than white IMO. A mixture that is too lean (white coloration) can burn valves, whereas the only negative from a more rich mixture is shorter plug life. And since plugs are a lot cheaper and easier to replace than valves, the decision is an easy one.
Apr 25, 2004 | 08:57 PM
#15
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Proper 4 stroke plug coloration
Originally posted by: springdrl
More brown than white IMO. A mixture that is too lean (white coloration) can burn valves, whereas the only negative from a more rich mixture is shorter plug life.
More brown than white IMO. A mixture that is too lean (white coloration) can burn valves, whereas the only negative from a more rich mixture is shorter plug life.
Apr 25, 2004 | 11:33 PM
#16
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Proper 4 stroke plug coloration
Guys, 4stroke plugs are NOT supposed to be brown, or any shade of it. You are stuck in 2 stroke mentality. Lubrication is separate from fuel air mixture, and therefore your only enemy is too much heat/detonation/preignition, which is evident by a totally white plug, or other signs on the plug. Just a shade darker than white guys.... [img]i/expressions/face-icon-small-wink.gif[/img]
Chris 142, I disagree on the best way to tune/jet an engine as being on a dyno. I would much prefer for fine tuning an EGT gauge to dial in the exact combustion temps that were ideal, as well as a real time digital tach. Dynos are less accurate than real use, with a real load, and 50+mph winds blowing in the intake etc. I dont think any fan at a dyno facility can really replicate real riding.
In any case, with 4strokes, jetting/mixtures IS NOT nearly as crucial as in a 2stroke. Get it so that it runs well with no hesitations and good power, and a dark white/light light tan and you're good =]
Chris 142, I disagree on the best way to tune/jet an engine as being on a dyno. I would much prefer for fine tuning an EGT gauge to dial in the exact combustion temps that were ideal, as well as a real time digital tach. Dynos are less accurate than real use, with a real load, and 50+mph winds blowing in the intake etc. I dont think any fan at a dyno facility can really replicate real riding.
In any case, with 4strokes, jetting/mixtures IS NOT nearly as crucial as in a 2stroke. Get it so that it runs well with no hesitations and good power, and a dark white/light light tan and you're good =]
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