Grimm
TY 4 Stroke God
- Joined
- Apr 15, 2005
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- 2018 MXZ 850
For a newbie here, you already are aware of Yamaha's primary negative flaw, their non willingness to make timely improvements.
Fortunately, it's their engine and build quality that keep them at the forefront.
Fortunately, it's their engine and build quality that keep them at the forefront.
Your right , my last sled was a differant brand, but the two previous were Yamaha's. I bought a 06 nytro for my son then bought the 08 Nytro for myself, final thought 
08NitroRTX
VIP Member
I found this to happen both when the weather was cold (below 0F) and warm (30-35) inbetween these temps I didn't notice the ice build up as fast ot maybe it just cleared itself before total blockage of allowing fresh cool snow on the front heat exchanger.
In my opinion: (still lol) in colder temps some of the snow is melting as it gets tossed onto the exhaust and due to turbulance this 'wet snow' starts to pack up and stick to things under the tunnel. Slowly but surely closing off the front exchanger from fresh snow to effectively cool the engine. In the warmer temps when the snow is great for making snowballs ... well that is exactly right it is just packing up under there again blocking off the exchanger. The upper radiator does not displace enough heat to sufficently keep the FX Nytro's 1050cc engine cool by itself fan or no fan when running hard for long periods! Many will NEVER see this trail riding .... But that sled over heated and caused engine damage running 80-95 mph @ below 0 F in perfect snow conditions!!
Granted the temp light had been on for miles prior to engine damage but we knew we would have issues before we ever got to the starting line some 500 miles back! Trust me it's not like these things are going to do damage the first sign of the temp light blinking ..... You have pleanty of time (miles and miles!!) to stop and clear the exchanger or slow down and allow the radiator to cool the engine down. (and the radiator WILL keep the engine in normal operating temp at lower RPMS) We were actually flirting with high engine temps for many miles .... we just pushed it too far before slowing down but that is racing!
In my opinion: (still lol) in colder temps some of the snow is melting as it gets tossed onto the exhaust and due to turbulance this 'wet snow' starts to pack up and stick to things under the tunnel. Slowly but surely closing off the front exchanger from fresh snow to effectively cool the engine. In the warmer temps when the snow is great for making snowballs ... well that is exactly right it is just packing up under there again blocking off the exchanger. The upper radiator does not displace enough heat to sufficently keep the FX Nytro's 1050cc engine cool by itself fan or no fan when running hard for long periods! Many will NEVER see this trail riding .... But that sled over heated and caused engine damage running 80-95 mph @ below 0 F in perfect snow conditions!!
Granted the temp light had been on for miles prior to engine damage but we knew we would have issues before we ever got to the starting line some 500 miles back! Trust me it's not like these things are going to do damage the first sign of the temp light blinking ..... You have pleanty of time (miles and miles!!) to stop and clear the exchanger or slow down and allow the radiator to cool the engine down. (and the radiator WILL keep the engine in normal operating temp at lower RPMS) We were actually flirting with high engine temps for many miles .... we just pushed it too far before slowing down but that is racing!
SRXTripman
Extreme
High temps
Hey guys I to will be new with the 4 strokes this year ,I have done a few things to help the temp problem , I flushed all the ethyl glycal antifreeze out of the coolant system and instaled Engine ice , Daytona digital temp gauge for monitoring the real temperature (not an idiot light ), having the radiator fam installed shortly the last thing I found was using a 3/4 inch drill bit and puting 3-4 holes in the rear of the lower radiator panel ,this will hopefully create air flow through the radiator , used some aluminum gutter screen and painted it flat black to match the factory front one . It seems to work I put a fan on low blowing through the front while drilling and it blew most of the plastic shavings back at me thus making me believe I might have figured Yamahas overheating situation out .After the screen was painted and installed you would have thought it was factory .
Hey guys I to will be new with the 4 strokes this year ,I have done a few things to help the temp problem , I flushed all the ethyl glycal antifreeze out of the coolant system and instaled Engine ice , Daytona digital temp gauge for monitoring the real temperature (not an idiot light ), having the radiator fam installed shortly the last thing I found was using a 3/4 inch drill bit and puting 3-4 holes in the rear of the lower radiator panel ,this will hopefully create air flow through the radiator , used some aluminum gutter screen and painted it flat black to match the factory front one . It seems to work I put a fan on low blowing through the front while drilling and it blew most of the plastic shavings back at me thus making me believe I might have figured Yamahas overheating situation out .After the screen was painted and installed you would have thought it was factory .
LJ 452
TY 4 Stroke God
Re: High temps
Did you install a second fan in the front? I'm confused, as to both the things you did. What panel did you drill holes in? Do you have any pics?
SRXTripman said:
Did you install a second fan in the front? I'm confused, as to both the things you did. What panel did you drill holes in? Do you have any pics?
Skydog
TY 4 Stroke God
What temp is too hot on the Daytona digital temp gauge?? 225deg.???
Thank you Skydog
Thank you Skydog
08NitroRTX
VIP Member
If memory serves correct 212F light comes on.. I'll have to check to be sure, but that sticks in my head!
Edit ... I checked one of my earlier posts: Yep @ 212F high temp light comes on. Then @ 260F critical engine damage happens ...
225F is hotter than these engines 'like' to run, but they'll be fine if that is as hot as it gets...
Edit ... I checked one of my earlier posts: Yep @ 212F high temp light comes on. Then @ 260F critical engine damage happens ...
225F is hotter than these engines 'like' to run, but they'll be fine if that is as hot as it gets...
skyboz
TY 4 Stroke Junkie
Ulmer stated in a different post that if you see 200 degrees start looking for fresh snow!
SRXTripman
Extreme
Cooling,fan,temp
Just trying to clear up what I said earlier , I had the fan instaled ,then I installed the temp gauge (260-265) cant remember . Replaced the engine coolant with engine ice , I drilled holes in the rear of the panel that covers the battery ,radiator and so on . After I did these things I took a small fan and placed it tight to the body , to see if I would get any wind blowing through the radiator (like I was runnin down a trail). I used aluminum gutter screen painted flat black ,just like the front factory one . The purpose for the rear holes is to cerculate the air through the radiator , just like the NYTROs do by there open panels on the rear , I got the idea from OCEOLACABIN ,I just tweeked it a little bit . If i can get some pictures il load them . If I cant look up oceolacabins utube shots he did a prety good job .
Just trying to clear up what I said earlier , I had the fan instaled ,then I installed the temp gauge (260-265) cant remember . Replaced the engine coolant with engine ice , I drilled holes in the rear of the panel that covers the battery ,radiator and so on . After I did these things I took a small fan and placed it tight to the body , to see if I would get any wind blowing through the radiator (like I was runnin down a trail). I used aluminum gutter screen painted flat black ,just like the front factory one . The purpose for the rear holes is to cerculate the air through the radiator , just like the NYTROs do by there open panels on the rear , I got the idea from OCEOLACABIN ,I just tweeked it a little bit . If i can get some pictures il load them . If I cant look up oceolacabins utube shots he did a prety good job .
Skydog
TY 4 Stroke God
Thank you
Skydog
TY 4 Stroke God
You guys know how to set the clock on the Daytona digital temp gauge? Do you have to take a cover off?
Thank you Skydog
Thank you Skydog
Crewchief47
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Re: Cooling,fan,temp
I get the feeling you're talking about a phazer? If you are, you should realize you're posting in the Nytro forum.
SRXTripman said:
I get the feeling you're talking about a phazer? If you are, you should realize you're posting in the Nytro forum.
LJ 452
TY 4 Stroke God
Skydog said:
Can't remember exactly, but there is no cover, just press and hold "Set" until the hour starts flashing. Press mode or set and it will increase the number, proess the other button (Mode or Set) and it will flash the minutes, adjust time and press (Mode or Set) again. Your done. Remember you'll need to start this process in the clock mode, and it is a 24 hr clock.
SRXTripman
Extreme
yep thanks though
I did realize that just thought I would try in help you guys out .
I did realize that just thought I would try in help you guys out .
