03 yz450f won't idle

[colorado livin nlah]

I've gone through the carb, cleaned it. I rejetted it for altitude, all new jets. I broke the float bowl cover so I got an r&d power bowl with an adjustable accelerator pump.

The bike won't fire unless I hold the throttle at 5 or 10% and will die if I let go of the throttle. I've moved the fuel screw as much as I can both ways.. did nothing. I've messed around with the throttle cable.. tight and loose.. I'm not sure what else to try. Could it be related to the throttle position censor ? 

Maybe related to the float ? I did nothing to the float.. would the wrong float position result in no idle ? 

[colorado livin nlah]

I got it to idle. The idle speed screw was stuck, but now a new problem. The clutch won't engage/ disengage not sure which way it works. The bike has sat for a couple years, is it possible that the clutch plates are stuck ? Its somewhat cold, but not cold enough for it to not start. The clutch cable is tight, and pulls the mechanism. I'm really confused it didn't do this when I parked it. 

[grayracer513]

The clutch normally drags badly enough that it's difficult at least to roll the bike around in gear with the clutch disengaged (lever held in), but when they sit for a while the plates can get stuck together.  Get it running, get it rolling in neutral, and drop it in gear.  Hold the lever in until the clutch finally releases, and it should be OK after a while.

[colorado livin nlah]

Thanks for the info. I tried to do as you suggested, but unsuccessful. Do you suggest I hold the clutch lever while I kick it in gear ? I gassed the hell out of it and didn't want to go. I've found other threads here with similar problems, how hard is it to clean the plates ? I don't even know where they are located.

[grayracer513]

51 minutes ago, colorado livin nlah said:

Do you suggest I hold the clutch lever while I kick it in gear ?

how hard is it to clean the plates ?

1) Won't help.

2) Easy.  Under the big round cover on the right.  If the bike's been run in the previous two hours, you won't have to drain the oil, just lean it a little.  Remove the 6 screws holding the clutch springs down and pull the pressure plate off.  WATCH FOR A 10mm STEEL BALL.  It lives between the short outer clutch push rod/release bearing assembly and the inner rod.  They have an inborn talent for escaping unnoticed and rolling across vast reaches of obstacle-strew shop floors to hide in the most ridiculous places.

You will need a couple of small "L" shaped picks too reach around the sides of the clutch assembly to pull the plates out.

Free Shop Manuals:

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[colorado livin nlah]

Thanks worked like a charm.