Why Won't This Carb Work???
Posted: 06:48 pm Dec 02 2004
I have an '84 KDX200 and bought a used Mikuni carb off an '87 KDX200. I put it on my bike and it idled great but had no power and sounded like it had a miss in the engine when I gave it gas. It's almost identical to my original carb. The differences are the slides, slide needle, and the position of the choke and the idle screw is on the opposite side. I tried puting the jets out of the old carb into the newer one but it got worse, would'nt idle, and fell flat when giving it gas. I was going to try to exchange the needles but the needle in my old carb is much fatter and longer than in the newer carb so it would'nt fit the new carbs slide. I've looked at the plug and it looked brand new after trying the new carb, not a spot of carbon. What could I be overlooking?
Why change the carb? The old one has a crack in the idle jet circuit. It's below the jet though. It's cracked on the part that extends down into the fuel bowl. The old carb works good, it turns the porcaline a gold to tan color shade. It turns the grounding part of the plug, the part right above the threads by the grounding strap, almost a blu-ish brown color. Like it got alittle to hot. I notice a detonation sound when the engine is at hig RPM's. I run hi- octane fuel, around 91 octane.
Jon.
Why change the carb? The old one has a crack in the idle jet circuit. It's below the jet though. It's cracked on the part that extends down into the fuel bowl. The old carb works good, it turns the porcaline a gold to tan color shade. It turns the grounding part of the plug, the part right above the threads by the grounding strap, almost a blu-ish brown color. Like it got alittle to hot. I notice a detonation sound when the engine is at hig RPM's. I run hi- octane fuel, around 91 octane.
Jon.