On summer days when i ride my 400ex the header pipe and heat sheild get so hot it burns my eg even tho it is 3-4 inches away. do you guys have any ideas on how to cool the heat sheild and header pipe down?

 

im not sure how to cool it down but my 300ex does the same thing after 6 hours of rideing i have burn scars on my legs from it

 

You could be running lean. Don't forget that the EX is air cooled and if you are going slow through trails it will get hot and the heat has to go somewhere. Even during cooler fall and winter days the engine can get pretty hot when the air is not moving over it. This is pretty normal.

 

im not moveing slow when i do it im usaly in 4th or 5th when it happenes to me

 

how would running lean make the header pipe hot

 

There is no thermostat on your quad. Heat is controlled by the air fuel mixture. More fuel means cooler exhaust. Anyone who has an EX has most likely noticed the stock head pipe turn blue from heat (stock148 main jet is pretty lean). By simply changing the main jet to a 150 this problem is prevented. This doesn't mean that you can jet up to keep the motor real cool though. The air fuel mixture has to be at a point where the motor will run right. I personally jet mine just a little rich because its safer that running a little lean. I might be loosing a little power because of it but, the average rider can't tell the difference.

 

Are you wearing pants? I wore shorts once and damn, it freaking burns the hair off my right leg.

 

dude it did the same thing to me seriusly my skind is like all burnt and there no hair on then inside of my calf now lol

 

My wifes LT was doing the same thing to her leg.........I went and got header wrap from the parts store, and wraped it far enough back to clear her leg....It helps a TON, and it keeps the head cooler too.

 

heat wrap or ceramic coating will help. if you go with the coating, i would have www.swaintech do it. their coatings are much thicker and more durable.