03 YZ450F Hot Start/Fuel Needle


8 replies to this topic
  • GreggT

Posted November 03, 2004 - 03:44 PM

#1

When my 450F stalls in a race it takes 5 minutes to start. I try hot start, full throttle, no throttle. I have idle turned up with a Zip Ty fuel needle set at 2 turns out. I'm tired of loosing while kicking. Any help? :cry:

  • yzf450jack

Posted November 03, 2004 - 04:13 PM

#2

Maybe 2 turn's is incorrect You have to adjust for the weather and altitude :cry: just about every time you ride! or it's a pain in the :cry: starting it :cry:

  • GreggT

Posted November 03, 2004 - 06:07 PM

#3

How do you adjust the fuel needle?

  • ch3

Posted November 03, 2004 - 06:29 PM

#4

I used to struggle getting my 04 to start also. It seems to start better if I kick it through slowly as apposed to quickly. If I flail away in a big panic, it can get real stubborn about starting. Usually one or two lazy half hearted kicks will get it going. I've fiddled with the fuel screw (zip-tie) but it doesn't seem to affect starting very noticably. I use the hot start in the summer but don't seem to need it much in the winter.

Something to think about,
Charlie

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  • JohnB

Posted November 03, 2004 - 08:37 PM

#5

Use the fuel screw to lean it out. It's ok if it back fires once in awhile. One thing that I do if I fall over or stall and it doesn't start within 2-3 kicks is to turn the gas off. This seems to work for me.

  • Ga426owner

Posted November 04, 2004 - 07:01 AM

#6

When my 450F stalls in a race it takes 5 minutes to start. I try hot start, full throttle, no throttle. I have idle turned up with a Zip Ty fuel needle set at 2 turns out. I'm tired of loosing while kicking. Any help? :cry:


I had the same issue - as well as too much wheelspin on hardpack. I was very frustrated!! And that is why I(and many many more 03 owners) added the GYT 5oz flywheelweight - it is complete - just remove the stock flywheel - and install the new one - works like a champ and no loss of power - just smooths it out - this is what was added to the 04 & probably the 05 - :cry:

  • skthom2320

Posted November 04, 2004 - 10:31 AM

#7

If it's hard to start when hot is is probably a little too rich on the pilot circuit. Turn your fuel screw in at least a 1/2 turn. Maybe even a full turn. You shoud have slight popping on deceleration. It's too far in if the idle "hangs" a little high after blipping the throttle.

  • GreggT

Posted November 04, 2004 - 10:50 AM

#8

Interesting. I have a 12 oz weight now.
As far as the fuel needle, I'm at 2 turns out now and the idle does hang high maybe I'm to lean not too rich.

  • skthom2320

Posted November 04, 2004 - 11:03 AM

#9

Maybe the pilot jet needs a cleaning. I had trouble getting my jetting dialed once. It turned out that a speck of dirt had gotten in the pilot jet and made the idle hang, but the off-idle response was like it was too rich. Anyway, I pulled the jet to put in a different size and found that it was clogged.





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