Jasonw
New member
Hey guys, I've been having some overheating problems with my Viper. Last season I added a heat exchanger to the rear tunnel which seemed to do the trick at the time. I put on about 800kms since then. Yesterday I left with my girl on the back and within 4kms The light came on and I had to pull over.
I've been thinking that I may of had air in there from last season because I didn't bleed anything. So I tried bleeding from the rear with the front in the air because I don't have the recommended pressure tool yamaha uses. I didn't get any air and I also tried the bleeder above the carb switch. There was no fluid at all from the carb switch bleeder. I squeezed the hoses and nothing. I could feel fluid in the hose on the top of the motor but nothing would come out the bleeder. I tried doing it with the switch in the on and off position, nothing. I pulled the small line off going to the carbs from the switch and was able to get fluid coming to there when I squeezed the big hose on the top of the head.
I tried this after the sled ran for 5 minutes also.
Any suggestions??
I've been thinking that I may of had air in there from last season because I didn't bleed anything. So I tried bleeding from the rear with the front in the air because I don't have the recommended pressure tool yamaha uses. I didn't get any air and I also tried the bleeder above the carb switch. There was no fluid at all from the carb switch bleeder. I squeezed the hoses and nothing. I could feel fluid in the hose on the top of the motor but nothing would come out the bleeder. I tried doing it with the switch in the on and off position, nothing. I pulled the small line off going to the carbs from the switch and was able to get fluid coming to there when I squeezed the big hose on the top of the head.
I tried this after the sled ran for 5 minutes also.
Any suggestions??

staggs65
Moderator
jason when you bleed from the rear you need the rear in the air, DAMAN posted the bleeding procedure recently i'll see if i can find it and post the link

staggs65
Moderator
Jasonw
New member
Thanks alot. I just finished reading the same issues other guys had. I should have done a search first.
Yeah, I understand my error now.
I didn't actually have any air in there. I thought I did when I couldn't get that front bleeder to work.
Do you have any recommendations for snow scratchers for my sled??
Yeah, I understand my error now.
I didn't actually have any air in there. I thought I did when I couldn't get that front bleeder to work.
Do you have any recommendations for snow scratchers for my sled??

staggs65
Moderator
i've never used em, but plenty of guys here do, someone else will probable post on it, try a search on that as well
02ViperMtn
Member
what is the size of the rear cooler? I have a rear cooler on my 02 viper (its only about 3" wide at most) and I still have over heating. I am going to try a rear exchanger with more capacity.

super1c
Super Moderator
02ViperMtn said:what is the size of the rear cooler? I have a rear cooler on my 02 viper (its only about 3" wide at most) and I still have over heating. I am going to try a rear exchanger with more capacity.
I think their is a small one that goes to a different sled and the a large one for the viper and SRX ( correct me if im wrong please? ). Mine is X3 larger than the one you have on both my vipers.
I also just put ice scratchers on both from RSI. They were only $39 a pair. I just mounted them where the 2ond boggie is on the front of the rail. They hang back a little far but im using them for cooling not the hyfax. Hyfax are cheap. I modified the mounting bolt so i could keep the boggie wheel on. They do make them from RSI but they seemed a little expensive for what they were and i just made my own.
also, if ya don't want to spend the money there is lots of info on homemade ones. they make them for the skies which works perfect for the running board coolers.heres one site
http://www.snowestonline.com/forum/showthread.php?t=62293
http://www.snowestonline.com/forum/showthread.php?t=62293