hey guys, i am sellin my DS for a 400ex, and just want some info on the 400. well i ride moslty ditches and trails and the DS is getting a little to big for that. i have rode a couple 400's and i liked them, but i have a couple of questions. does the air cooling really affect it? does it overheat a lot in warm weather? i also plan on riding and hopefully racing soem MX and some harescrambles too, how much more power does a 440 give with diff pistons and cams and a fmf titanium 4 exaust/powerbomb headpipe. any info will be a great help. thanx in advance.

 

I have never had a problem with my EX overheating. There are some precautions you can take to keep the temp down, such as air scoops, a bigger oil tank, running a cooler plug, and running certain oils.


I have heard that the 416 kit is more reliable, revs faster, and in most cases out performs the 440.

 

<< I have heard that the 416 kit is more reliable, revs faster, and in most cases out performs the 440. >>



who makes the 416 kit

 

Call Marcums ATV. 1-877-264-3409, Talk to Terry Marcum. He can tell you everything you need to know. He's a great guy, know his stuff, and his kit runs right around $300

 

I rode a 440 kitted ex and It is sweet. I doubt very seriously that the 416 would beat it, it did not over heat and was very trackable.

 

i've heard a lot of talk about the motors burning up from the 416 and 440 kits

 

smart man, hes finaly getting rid of his tank.

 

Tank A.K.A. Raptor EATER...haha

 

maybe so but my banshee would have smoked it.

 

The 416 kit is every bit as dependable as stock. I know guys that have been running them for 2-3 years without a problem. On the other hand, I know a couple guys that had the 440 kit, and had problems throwing rods.