Maintenance & Technical > KX500 Steel Frame Conversion (SFC)
KTM 450/ K5
sandblaster:
In my sand bike and super moto I run the following:
168 main, 55 pilot, stock needle in 3rd position, with the air screw 1.5 out, I'm at sea level running Motul 800, Non Ethanol 92 at 50:1.
Both bikes run flawless with no ping or high rev at idle.
I suspect that you might have a small air leak...
Foxx4Beaver:
--- Quote from: sandblaster on November 11, 2013, 07:56:50 AM ---In my sand bike and super moto I run the following:
168 main, 55 pilot, stock needle in 3rd position, with the air screw 1.5 out, I'm at sea level running Motul 800 at 50:1.
Both bikes run flawless with no ping or high rev at idle.
I suspect that you might have a small air leak...
--- End quote ---
+1 on the air leak, do a leak down test....I'm at about 250FT above sea level, and I'm running far leaner jetting than both of you with awesome results...at 50:1 on Motul with a 25% mix of VP-C12 mixed in with 93 octane.
Toom038:
Thanks. Will do leak test.
Toom038:
Yes, there was an air leak. Seems I had the seal on the power valve actuating arm in backwards. I took it to the track yesterday and it ran much better. After playing with the air screw and idle adjustment I got rid of the surging and/or run on. This thing is very sensitive to air screw settings. I'm really starting to like this conversion. The 12 pound difference can be felt everywhere. It can be ridden longer, it doesn't wear me out as fast. The lack of weight makes it easier at turn in. Had to soften the compression on both ends 4 clicks and reset the rear sag. I will need to change my riding style a bit. Haven't ridden a smoker since '99 I think. Found myself trying to clear jumps with the throttle instead of speed. Had it nose high a couple of times. With the thumper I could gas it on the faces to clear them. It's kinda scary doing that now when the power valves open. This thing is a beast! And a blast to ride!
Foxx4Beaver:
--- Quote from: Toom038 on November 24, 2013, 06:55:42 AM ---Yes, there was an air leak. Seems I had the seal on the power valve actuating arm in backwards. I took it to the track yesterday and it ran much better. After playing with the air screw and idle adjustment I got rid of the surging and/or run on. This thing is very sensitive to air screw settings. I'm really starting to like this conversion. The 12 pound difference can be felt everywhere. It can be ridden longer, it doesn't wear me out as fast. The lack of weight makes it easier at turn in. Had to soften the compression on both ends 4 clicks and reset the rear sag. I will need to change my riding style a bit. Haven't ridden a smoker since '99 I think. Found myself trying to clear jumps with the throttle instead of speed. Had it nose high a couple of times. With the thumper I could gas it on the faces to clear them. It's kinda scary doing that now when the power valves open. This thing is a beast! And a blast to ride!
--- End quote ---
awesome...ride on!.....wish I could, little too cold for me today, 25 degrees and light snow :?...not the most desirable riding conditions.
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