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View Full Version : Z dies after i rev it up or when i stab the throttle..Help!!!


New-400ex_guy
10-05-2002, 07:21 PM
stats: ct full pipe, k&N filter with no airbox lid, 155 mikumi main jet, 4th clip down on the dynojet needle, 3 turns out on the mix, 25 pilot.


well i dont know whats wrong. it runs like a raped ape but if im stopped or sometimes when im going if i nail the throttle it will die when i let off and pull the clutch in or when im in neutral and do the same thing. also if i try to stab the throttle real quick it will just die. ive tryed messing with the idle but it does not good, i recently went richer on the needle and put a bigger main and it rocks in mid and upper ( although i probly need to go a bit bigger on the main.

could it be my pilot? i went from the stock 122.5 to a 125. i cleaned the carb out and it helped.

weird thing is if i put it on half choke i can stab the throttle and it wont die.

what do you guys think, does it die if you just wot then let right off. sometimes it doesnt happen and sometimes it does on mine.

dam where is my fuel injection :rolleyes:
Rider#11
10-05-2002, 07:54 PM
is your air filter cloged? check your plug?
New-400ex_guy
10-05-2002, 07:57 PM
air filter was just cleaned and i dont think over oiled, plug is barley tan, but i went up on the main and almost got rid of my stumble there ( need one more size up probly ).
Derek
10-05-2002, 08:48 PM
what do you expect.........................j/k no flame intended
stupid driver
10-05-2002, 10:00 PM
sounds like an intake prob to me. i had this happen to my ex today. i went muddin yestaday, forgot to clean my filter and let out the water, and every time id go over a jump and the water in my air box was swept bak my 400 wud die. not kool. took out 5 minutes of good ridin:mad:
airheadedduner
10-07-2002, 11:43 PM
Check your needle clip. It could have fell off so when you hit the throttle it just dies, no fuel.
My R did that before.
Z400central
10-07-2002, 11:50 PM
i think its an intake problem also....
lil400exman
10-08-2002, 12:33 PM
Originally posted by New-400ex_guy
stats: ct full pipe, k&N filter with no airbox lid, 155 mikumi main jet, 4th clip down on the dynojet needle, 3 turns out on the mix, 25 pilot.




weird thing is if i put it on half choke i can stab the throttle and it wont die.


dam where is my fuel injection :rolleyes:

well that obviously says your running to lean casue the choke richens your mixture:rolleyes: that simple!
lil400exman
10-08-2002, 12:36 PM
aslo when you really get on the gas another jetting problem casue you are starving your motor of fuel casue its burning in the motor and you jet cna not produce enuff to compensate casue it is to small geeze people.....:eek: