Maintenance & Technical > KX500 Steel Frame Conversion (SFC)
2001 RM250/ 1994 KX500 conversion. The "Kawasuki RM500"
Foxx4Beaver:
--- Quote from: mikectanker on March 27, 2016, 03:07:03 AM ---Currently 1994 pwk stock carb
Air screw 2 turns out
Main jet 178
Pilot jet 55
Needle 82R (stock)
Clip in top/leanest position
--- End quote ---
that's some bizarre jetting for a stock carb....what elevation and air temps are you typically running in?
Foxx4Beaver:
Motorrad's standard base point recommendations for a stock carb are...
main...168
pilot...55
middle clip position with a stock needle
1 1/2 to 2 turns out on air screw
you will more than likely have some fine tuning to do...as I had to run a bit leaner to those base settings with a stock carb.
I was running..
main...168
pilot...52
N82T needle in 2nd from top(leaner needle)
1 3/4 out on air screw
I'm only at either side of 250ft above sea level.
I myself, and others on here have found that dropping down to a 52 pilot makes a huge difference, especially if doing a lot of slow speeds...like trail riding...cleaned it right up.
Everyone's will be a touch different, just due to elevation/air temp/motor mods/style of riding....just remember to go in small increments at a time, and only change one thing at a time.
mikectanker:
1000 ft +\- 200ft sometimes higher. All those jets were in the carb when I got it. I've never been a master of jetting but it seems ok. I think there's room for improvement. It was 55 degrees yesterday testing a little bit.
The fmf jetting recommendations for a 1994 carb at 65-80 temps 32:1 at sea level. ...
Main 175
Pilot 58
Needle stock (82R)
Clip 2nd position
Air screw 1.5 out
The main jet sizes vary from 175 to 165 on the fmf sheet that came with the pipe
Foxx4Beaver:
yeah those charts tend be on the "fatter" side....because they don't want to be responsible for anyone blowing their motor, for suggesting too lean of conditions....so they keep it on the "fatter/safer" side.
There's a few threads on here referring to charts, and most guys say, that they end up pretty far off (leaner for the most part) from what the charts suggest.
Motorrads base line settings are the better ones to use.
RoostDaddy:
I am also from PA with elevation in the same area as you. Also running a Gorr motor, FMF pipe and silencer, stock style reed cage with Boyesens. Although my motor is 88mm bore and carb is bored to 40.5mm running straight VP fuel.
I think you may find yourself in the range of 50 pilot 168 main clip in the middle with the airscrew 2 turns out. Not saying for you to go with these exact jetting specs but I do believe that this will have you close.
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