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View Full Version : losing power on top end


REPOMAN
03-27-2008, 12:39 PM
and i think it is jetting. what jet do i need to switch out?
top of any gear it cuts out
my88r
03-27-2008, 12:56 PM
main jet. what clip is the needle on???? possible clutch problem
REPOMAN
03-27-2008, 01:03 PM
not sure what the jetting is right now. the clutch is good.
what is the best jetting for my setup?
07trx400ex
03-27-2008, 01:06 PM
I would try contacting Curtis Sparks or K&N(they will refer you to DynoJet). I was having similar problems and eventually got it right after talking to the people at Dynojet.
my88r
03-27-2008, 01:08 PM
whats the plug look like. im not sure about a 440 jetting. but around stock jetting i know. probably time to get in the carb to see what you got.:grr:
REPOMAN
03-27-2008, 01:10 PM
plug looks good. looks real good actually. i do need to get in there andsee what jets are in there, just thought i would get a jump on it and see what everyone thought. i did burn a hole in my coil wire but taped it up good and the spark is not coming out through the tape. i really thought thats what it was.
tar
03-27-2008, 08:51 PM
Make sure your air boot didn't slip off the carb. It happens to me quite often:mad: I need to do somthing about it!
REPOMAN
03-27-2008, 09:15 PM
Originally posted by tar
Make sure your air boot didn't slip off the carb. It happens to me quite often:mad: I need to do somthing about it!
thanks for the tip i will look in the morning. i changed the needle down a notch tonight and will try it out tommorow.