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View Full Version : Stalls and breaks up



intruder
03-30-2004, 05:03 PM
When running hard and coming to a turn when I let off on the gas the quad stalls and has trouble starting. It also breaks up before the rev limiter in all gears this is really pissing me off. Any help would be great. I'm running a Big Gun full system with the lid on: GYTR needle #4 clip 168m 45p 2.5 turns mixture screw.
:huh :huh :huh

Toadz400
03-30-2004, 06:41 PM
Sounds like your jetting is way off, since I don't know anything about the YFZ450 jetting I can only say it sounds like it's running way lean or way rich.

intruder
03-30-2004, 07:08 PM
Spark plug comes out looking like it's rich

5valves
03-30-2004, 07:10 PM
Take off the lid or Jet down. I run a 45,165, with full system and no lid with K&N.
Mine runs great

EvilJester400EX
04-05-2004, 08:03 AM
Originally posted by intruder
When running hard and coming to a turn when I let off on the gas the quad stalls and has trouble starting. It also breaks up before the rev limiter in all gears this is really pissing me off. Any help would be great. I'm running a Big Gun full system with the lid on: GYTR needle #4 clip 168m 45p 2.5 turns mixture screw.
:huh :huh :huh

Play with your clip position, I'm not sure whether you should heighten it or not.

intruder
04-05-2004, 12:32 PM
We dropped the jet to 165 and opened the air screw 1/2 turn more and all is well.

jlhughes750
04-06-2004, 01:02 PM
I'm runnin a Dr.D exhaust with a K&N and the lid on.
168m,45p,and YZ needle in the middle. When the filter gets the slightest bit dirty it starts to break up a lil. Its real sensitve to flow...Man what a monster when u take off the lid!!!!! I'll wait till its not so muddy out for that.