overheating

[iamabowler]

How do you tell if your motor is overheating ? I'm fixin to be getting a 400 and have not had an air cool before. If your motor does over heat how do you get it to run cooler seeing how theres no radiator?
thanks alot

[quadrider400]

You can get a temp gauge that goes into the oil res....and you can get fins that will force more air in and around the motor... my other thought is to add a larger oil cooler ... just never got around to it... :rolleyes:

[guinness77]

Air scoops do WONDERS for helping cool a 400ex. They're not cheap for what you get. They run around $80.00. If you're mechanically inclined you can buy a sheet of metal and make your own. I did. It takes about 2 hrs with a dremel and a rivet gun.

[DieselBoy]

ohhh youll know when shes runnin hot:P

[stalefish_132]

if you're worried about running hot air scoops do make a differance on EX's. paying $80 fo0r a set is realy alot for some scoops

[2004exrider]

It is really hard to over heat a 400ex. Unless your riding around in first gear at full throttle all of the time then you shouldnt have to wory:p . Just as long as your moving pretty good and getting air passed the engine you shouldn't have a problem.

Jimmy

[79400ex]

I have got my 400 ex hot several times. THe only thing I have notice that it looses a little power. Just keep your oil cooler clean and you shouldn't have any problems.

[Sleeper]

If it's hot and you stop and try to take off slow it might make a clicking noise and be a bit jerky. Air scoops help and like 2004exrider said you have to be on a short track pinned in 1st o 2nd for a while to get it to that point.

Sleeper

[Plante400]

lol not a 440 i was ripping on mine in a pit last weekend i cant believe it didnt blow up it was so damn hot


edit: will scoops help cool my 440 or is it not worth it and just going with the better oil cooler

[PowerJunkie]

what about racing mx?

[DieselBoy]

It's pretty insane how hot the motor gets, especially when you shut it off when its hot. I wouldn't doubt the air scoops would help alot, but if you ride slow it wouldn't really do much...

[1fst400]

It will loose power seem slugish when over heating. Mine did it all the time. I would just take off doun a straght strech.

[krt400ex]

Originally posted by DieselBoy
It's pretty insane how hot the motor gets, especially when you shut it off when its hot. I wouldn't doubt the air scoops would help alot, but if you ride slow it wouldn't really do much...

I don't knoe. I yhink yhats the point of them. They help get extra air to your engine to keep it cool. whether you're riding fast or slow. I ride on the faster side and I've only had problems overheating on tight twisty trails. Not often and not that bad, but you can tell.

[DieselBoy]

Originally posted by krt400ex
I don't knoe. I yhink yhats the point of them. They help get extra air to your engine to keep it cool. whether you're riding fast or slow. I ride on the faster side and I've only had problems overheating on tight twisty trails. Not often and not that bad, but you can tell.

that's what i mean... if you ride in tight twisty trails and stuff the air scoops arent' going to perform 100% as opposed to moving moderate-fast where its scooping the wind.

[boricua]

makes sense to me. sounds like a better/bigger oil cooler is more effective at slower speeds than scoops.....

[krt400ex]

Originally posted by DieselBoy
that's what i mean... if you ride in tight twisty trails and stuff the air scoops arent' going to perform 100% as opposed to moving moderate-fast where its scooping the wind.

Ya got a point.