Freinds raptor660s head pipe gets so hot that it get bright red he has a full yoshi exhaust. How can he make it run cooler?

 

i switched my radiator fluid to engine ice and it helped a lot

 

thanks

 

they will glow hot like that anyways its normal expecially if he has a aftermarket pipe

 

it is not uncommon to see it glow even on a stock exhaust

 

Hmmmm.... I dont believe this at all. It has to be running way to lean for it to be hot like that. I have never seen a headpipe on any atv let alone all the raptors I ride with glow red hot at the darkest of night. I would say the jetting is way off.

 

mine glows red at night, and i had mine jetted at the place i bought my raptor from, jetting is right on, my other friend has a raptor also, it glows at night too....so i dont think the jetting has much to do with it...

 

they will glow bright red when the jettings off, they should glow red even when the jetting is exactly right.

The headpipe stainless steel walls are thinner than stock headpipe. therefor they heat up quicker. Plus the inside of the headpipe for the yoshi is larger diamater than stock, thus allowing more air flow and more heat passing through.

It's ok, just check your plug and make sure it isnt white and your good to go.

(i thought the same thing when i first installed mine too)

 

I have to agree with Raptor Owner! I have had a TON of engine work done my quad, seveal different pipes on it, and also been around ALOT of other Rappys... the ONLY time the head pipe would glow red is when jetted to lean. If you think this is normal and your bike is doing it I would look at the plug and make sure it doesn't have a "white" color to it just to be on the safe side. I would hate to see anyone lose an engine just because they were TOLD something was normal.

 

MINE STILL DOES IT AND MY PLUG IS RUSTY BROWN.

I DUNNO THOUGH