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KTM MX & Off-Road Dirt Bikes
oil spooge down silencer crank seal or running rich
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[QUOTE="_JOE_, post: 1429701, member: 77507"] Ok, first of all, if the pipe was changed and it wasn't rejetted you need to do that first. I don't go over 40:1 on the premix, I prefer 32:1. More oil, more power, more life. Chances are your premix oil burns cleaner than the crappy pump gas we run. Going with less premix oil actually makes your air/fuel ratio richer. It's not so much how much oil is getting to the cylinder, it's how much fuel. Mixing in less oil means more fuel and richer air/fuel ratio. Follow the steps in the link above and post here if you have questions. If you run into trouble (like the engine doesn't seem to respond to tuning) then have a leak down test done by a competent, reputable service shop. If it starts easily and idles well the pilot circuit is probably pretty close, most likely the pilot jet can be left alone. You'll likely find that the main jet and needle are too rich because of the exhaust. This is pretty normal. Get a few main jets and take the bike OUT RIDING. You can't even think about jetting it until you can go out and hold it wide open through the gears under load. A large, flat field is the best place to work on jetting. Any changes to the main and/or needle should be slightly noticeable. Don't be afraid, you won't hurt anything if you take a test rip with the main or needle a step lean, but you should feel a decrease in power. Go a step at a time on main and go down until it starts to fell like it's not improving, I usually go back up one at that point for margin of safety. The needle clip position is last and should be vquite noticeable when you make changes. If you get it jetted for the best performance and it still smokes and spooges have a leak down done. Two strokes are incredibly simple to diagnose and tune, don't get psyched out. Sure, it would suck if you had to have the crank seals replaced........ but remember, that will cost you half the price of redoing the valvetrain in a thumper! [/QUOTE]
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Dirt Bike Discussions By Brand
KTM MX & Off-Road Dirt Bikes
oil spooge down silencer crank seal or running rich
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