02 Viper Overheating.

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yamahinn03

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OSHKOSH WI.
Road yesterday and my wifes viper over heated twice in 115 miles, both times on railroad grade, 1st time was approx. 45mph, temp about 25, plenty of snow, had 3 four strokes in the group no temp problems with them. Second time was about same temp running about 60 on rr grade. all fluids good, even add water wetter at beginning of season.All stock no mods. No leakage anywhere. Possible water pump problem? Or possible air in the system? Or?
 

Do a search on here, it's a common problem with the vipers. You can install a Bender opticool head gasket and a rear heat exchanger from an SRX to take care of the issue. -Ed
 
yamahinn03 said:
Road yesterday and my wifes viper over heated twice in 115 miles, both times on railroad grade, 1st time was approx. 45mph, temp about 25, plenty of snow, had 3 four strokes in the group no temp problems with them. Second time was about same temp running about 60 on rr grade. all fluids good, even add water wetter at beginning of season.All stock no mods. No leakage anywhere. Possible water pump problem? Or possible air in the system? Or?
Click to expand...


My dummy buddy once kept overheating for half a damned season b4 i
noticed his snow flap kept getting caught up in the tunnel ergo >>
scraping off the snow before it was thrown on the exchangers.

Never seen a redder face in stark white......pretty zippy little Formula 500.
 
I had the same problem, Yamaha did not install a rear heat exchanger on the vipers in order to save some weight. Dumb idea, I installed an srx rear heat exchanger and the opticool head gasket and no more overheating.
 
i have a temp gauge on mine, if i put my scratchers down it makes a huge noticable difference. Was ther much powder on the trail?
 
02ViperMtn said:
i have a temp gauge on mine, if i put my scratchers down it makes a huge noticable difference. Was ther much powder on the trail?
Click to expand...


Like I stated above normal trail conditions, about 25 to 29 degrees, snow was somewhat packy, but road in this before and no problem. 6000 mi on sled only happened 1 other time. Maybe just a fluke, will try again this weekend see what happens.
 
shouldn't be over heating in those conditions even though the vipers cooling ability is not good. Add a rear heat exchanger if you can find one readily, otherwise the scratchers should add a fair bit even with out a rear exchanger. If you tend to ride a road that is marginal snow with some gravel, I would definately get the exchanger. Pile snow on top of the running boards when it heats up. That cools it down quickly, as mentioned i had the problem and was able to see the differences these techniques made once i installed a temp gauge.
 
Yes I pretty much did that every chance I could, stop signs and intersections. Both times it happened was on the rr grade and had gravel snow mix and kinda packy snow, thinkn thats what problem was.
 
It could be a bad temp sensor as well. My Viper never has the temp light come on, and a buddy's is always coming on (doesn't have rear exchanger), so i am thinking his sensor is bad. Its just that in some of the conditions i have seen it come on i can't believe it could ever overheat.
 
If It Was A Gravel Snow Mix It Likely Was Overheating. Definately Go The Rear Cooler. Sounds Like Its Not Often You Ride In Marginal Stuff, But The Scratchers Will Add A Lot Once The Cooler Is In.
 
I've got a rear exchanger on mine and for example of how much it needs snow--- last week riding at all speeds on loose trails and packed trails with never any issues, but had to run on a used/plowed/packed car road for about 3/4 mile and I overheated at the end. Vipers need the loose stuff.
Who sells the opticool head gasket ?
Steve
 
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