Powerband?
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Powerband?
yesterday I took out my KDX for a short ride, it wasnt ran in about 2 weeks before that. So I start it up, let it warm up, and start riding and it had a monstrous powerband: wheelie through 3rd gear without leaning back! So then I took it offroad and put it through some bumps and afterwards the powerband mellowed out and got smooth. This isnt the 1st time its happened, and I just want to see whats up. Maybe something with the carb?
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Maybe your mix separated some and you were running a little lean?
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That's what I think too Wibby....
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"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!!! "
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I imagine it happens more often than we ever think about
My bike usually runs like a raped ape until she fully warms up, but it prolly has more to do with the fuel
My bike usually runs like a raped ape until she fully warms up, but it prolly has more to do with the fuel
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Mine only runs crappy for about 50 yards, the BOOM!
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I have had the power valves stick from the thick oily residue, until the motor gets good and warm. Then they free up and start moving normally. This will usually manifest itself in a sluggish, trials bike type powerband when cold, though, as the valves should be stuck in the "closed" position.
2004 Dual Sported KDX200
1999 Ninja 250 (Daughter's)
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1999 Ninja 250 (Daughter's)
1996 DR 650 (stock, mostly street use)
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My bike was a complete opposite though, it ran beyond great right after it got warmed up. Then I took it offroad and it became a little sluggish, lost a lot of the power it had before, even right off idle. Im running 32:1 oil/gas ratio right now, maybe I should lean it out to 40:1 or 50:1 ? I always use 93 octane pump gasgregp wrote:I have had the power valves stick from the thick oily residue, until the motor gets good and warm. Then they free up and start moving normally. This will usually manifest itself in a sluggish, trials bike type powerband when cold, though, as the valves should be stuck in the "closed" position.
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except that's gonna make it richerKDXrider1989 wrote:My bike was a complete opposite though, it ran beyond great right after it got warmed up. Then I took it offroad and it became a little sluggish, lost a lot of the power it had before, even right off idle. Im running 32:1 oil/gas ratio right now, maybe I should lean it out to 40:1 or 50:1 ? I always use 93 octane pump gasgregp wrote:I have had the power valves stick from the thick oily residue, until the motor gets good and warm. Then they free up and start moving normally. This will usually manifest itself in a sluggish, trials bike type powerband when cold, though, as the valves should be stuck in the "closed" position.
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I checked out whats going on with my KIPS today, the shaft rotates the side valves pretty smoothly. I took off the left side cover and saw the valves move when I pulled the shaft on the other side in and out. Just to ensure things, I put back on the left cover but left the plastic right side cover off and ran the bike and saw the shaft come out like it should when I revved it. I guess the jetting is what's causing the power band issue. One thing I do remember when I took off my exhaust was when I was cleaning out the crud from the cylinder with a paper towel and accidentally moved the valve at the top. I think it's the main exhaust valve, question is is it normal to move it easily?
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No, it probably shouldn't move easily other than a small amount of "wiggle". Also, from behind the left hand cover you can't see all three valves. You have to look up the exhaust with the pipe removed.KDXrider1989 wrote:I checked out whats going on with my KIPS today, the shaft rotates the side valves pretty smoothly. I took off the left side cover and saw the valves move when I pulled the shaft on the other side in and out. Just to ensure things, I put back on the left cover but left the plastic right side cover off and ran the bike and saw the shaft come out like it should when I revved it. I guess the jetting is what's causing the power band issue. One thing I do remember when I took off my exhaust was when I was cleaning out the crud from the cylinder with a paper towel and accidentally moved the valve at the top. I think it's the main exhaust valve, question is is it normal to move it easily?
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Was it cold outside? Cold air = more o2= more power. Once the bikes engine reaches operating temp, the engine should be LESS ABRUPT. I don't think it oil/ gas separation, unless you use a Castor Based Premix.
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I followed these instructions and according to it I need a smaller pilot jet. I don't think I can test the main circuit and throttle response until I get it. My bike has a few mods on it right now though, I guess I'm not used to putting something smaller on an engine that I would think requires more air and fuelscheckaet wrote:http://www.kdxrider.net/forums/viewtopic.php?t=1156