overheating in slushy conditions??

[terez]

Was out riding in above freezing temps today...beauty day but the snow was slushy...kinda like ice cream with slush and water in the corners.

No road running, always on the trail...there was always a rooster of slush or snow spray coming from the snowflap. I would off on get the yellow indicator light on the dash with the water temp icon displayed.
I assume this is an early overheat warning??
I could get it to go away by dipping into deep snow for a bit.

I'm surprised it was overheating or early warning of overheating with all the slush and wetness hitting the exchanger all the time? Is this normal for the Nytro??
I guess the ambient air was too warm for the rad to be cooling well??

The sled never puked the coolant bottle and the coolant level was always consistently fine.
The Nytro doesn't provide colant numbers??...just the yellow light and icon??
Will the yellow light turn red or give some other indicator when things get too hot?
Will it go into limp mode or something to protect from overheating bad enough to warp a head or block?

Can I ride with the yellow light on and the temp icon on or do I need to get snow under there or stop and cool off?? What is the shut down point??

My 2strks loved the slushy and even water for coolant....I guess cuz they had tunnel strip and rear exchanger coolers and no rad where the Nytro has a rad and only 1 front exchanger??

Thanks

 

[APEX 06]

By adding more vents this issue will go away. I add 4 vents one on the front of the hood, one in front of the bars, and one on each side behind the shocks. There is just to much heat under the hood and no way for it to go.

 

[Sevey]

In weather like that the front heat exchanger is doing all the work, sometimes wet snow packs tight as the track goes over it and only little bits get taken forward to the exchanger, which isn't enough.

I put on a console vent on the dash and it has really helped. When the fan for the rad kicks in, at least it has a chance to suck cooler air and not the hot air und er the hood.

As an experiment, last year on a day that was +10C I ran the sled without the centre hood, so the rad was completely exposed. The difference that made was crazy vs running it all buttoned up. It took way longer for the light to come on at idle.

Ms

 

[mcamzr]

The short answer is yes. I added the mt counsel vent and a arm vents with a temp guage. Still ran around 200+ on warmer days. I got tired of seeing that light so I added a tunnel cooler and now 175 is the hottest I see.

 

[grizztracks]

The stock cooling system is undersized and can't properly dissipate the heat these engines produce. The undersized system is most likely due to Yamaha trying to keep weight down. When I bought my 08 Nytro it constantly ran hot in warmer conditions so I added the Yamaha tunnel exchanger and haven't had a problem since. At the time no other options were available but now there are several aftermarket exchangers available. Check out Mountaintec, they sell a reasonably priced exchanger.