PDA

View Full Version : fuel or electrical


freak
04-27-2004, 02:54 PM
I have a 400 EX with JE high compression piston, FMF slip on, white brothers revbox, and a uni filter. after running the bike for a while it starts to cut out. Only if I keep the RPM's up real high or grab the choke will the bike run right. Any ideas?
44oEX
04-27-2004, 03:06 PM
check your jetting. Probably the needle
freak
04-28-2004, 01:22 PM
Ive cleaned the carb and tank twice and it seemed to run good 4 a week or 2 then its does it again?Done it this week about 45 min. into a 1 hour hairscramble?
44oEX
04-28-2004, 03:17 PM
I don't mean clean out the needle I mean change the clip.
Did you change anything on the quad lately? Or did it get hotter cose of summer? That could have a affect on your jetting.
freak
04-28-2004, 05:52 PM
Im not sure what clip your talking about but the only thing ive changed since last year is the spark plug.
cals400ex
04-29-2004, 12:10 AM
he is talking about the clip on the needle. this clip is adjustable in 1 out of 5 positions on the stock needle to make jetting richer or leaner from about 1/8 to 3/4 throttle.
freak
04-30-2004, 05:09 PM
I will try that this weekend.Got a race this weekend so that should tell me if that worked?I was thinking my rev box could be going bad????
KASCHAK
04-30-2004, 07:58 PM
Originally posted by freak
I will try that this weekend.Got a race this weekend so that should tell me if that worked?I was thinking my rev box could be going bad????

sorry i have to laugh.. :D you'll learn ;)
check out the techarticles on a carb. tells what a needle is what position of throttle it affects main what position is is mixture screws ect. then take a look at a plug diagram also in the tech artices.. will show if your running lean rich and different types of fouls.. then when you figure out whats going on or have an idea... come back to us and we'll help you out.