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81 clark racing
07-17-2007, 02:28 PM
ok i have a 04 400ex with the mods listed below. i just instaled a stage2 hot cam and im runing a mix of race fuel and 93. im still trying to get my jetting figured out. what are signs of a 400ex getting to hot, over heating? im runing a 170 main and 3rd notch on the needel. my plugs a brownish/whiteish color thanxs

07-17-2007, 03:09 PM
Hey I have a question for you. Does the icat spark enhancer give you a noticable difference in anything? It says throttle response but I dont beleive it.

XXXRACER165
07-17-2007, 05:17 PM
The engine usually idles high when it gets hot

RiderTRX400ex
07-17-2007, 05:32 PM
your plug seems to be a good color, jetting seems to be ok. is there something you noticed or something that happened that made you worry or think your EX was overheatin?

81 clark racing
07-17-2007, 06:19 PM
the icat yes made a difference but i dont think its worth 190 bucks unless your rich and have money to blow haha. as for my quad getting to hot i didnt really notice anything different just it seems to feel hot on my legs haha. and i was just wondering what it does when it gets to hot and over heats. mine runs awesome pulls hard great throttle response idles good so i guess im all set then

j450rking
07-17-2007, 07:31 PM
i would say you are ok but if you are worryed about it then i would go with a cbr 1100 oil cooler and some air scoops it works great!

REDRIDDER
07-17-2007, 08:24 PM
my brother had the i cat on his crf150 and i did notice that his bike ran a little hotter,but also you got to remember when you run race fuel it can throw the plug reading off,i would start with just using 93 pump fuel and try to jet it just using 93 and for the icat it makes a hotter spark and that's probably why their is a whitish color on the plug but race fuel will mislead you also.