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My 900 has been runnning a little hot lately. Like the fan kicks on constantly and blows hot air and the engine and the pipes get really hot (more than normal). It seems like it happens most when i get above 85. It also seems like my max speed is only around 100 -105 when before it was like 120. I live in Arizona so its pretty hot right now but I'm pretty sure my engine is running to hot. Also I don't have any engine lights on.

Anyone experience this before, should I worry?

O and my bike has about 21 000 miles.
 

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My 900 has been runnning a little hot lately. Like the fan kicks on constantly and blows hot air and the engine and the pipes get really hot (more than normal). It seems like it happens most when i get above 85. It also seems like my max speed is only around 100 -105 when before it was like 120. I live in Arizona so its pretty hot right now but I'm pretty sure my engine is running to hot. Also I don't have any engine lights on.

Anyone experience this before, should I worry?

O and my bike has about 21 000 miles.
Lemme get this straight: you live in one of the hottest states in the US, you're running the piss out of your bike, and you think it's getting hot? Hell YEAH, it's getting hot! But if you've got no idiot lights on and it's not puking coolant all over the pavement, it's not TOO hot.
 

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Water wetter works great........I'd try that first and keep an eye out to see if it gets better. Maybe you can use a point and shoot temperature guage to get a range of temps before and after.
 

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Okay, what is this water wetter stuff?! Never heard of it before. My bike doesn't run too hot or anything, but still I'm gonna have to look into that. Only the best for my baby!
 

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What weight oil are you using? I would be running a 20w50 for sure. Be thankful you got a waterbag an aircooled would be much worse.
 

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Lemme get this straight: you live in one of the hottest states in the US, you're running the piss out of your bike, and you think it's getting hot? Hell YEAH, it's getting hot! But if you've got no idiot lights on and it's not puking coolant all over the pavement, it's not TOO hot.
LOL.

Try this. http://www.redlineoil.com/product.aspx?pid=111&pcid=21

I would also think about an oil cooler (mod maybe 2) on that sucker. Don't mount it in front of the rad. You'll have to buy a crashbar and stick it(or them) on that. Cheaper than a motor.
 

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There is an engine coolant called Engine Ice (http://www.engineice.cc/faq.html) which we used to replace our coolant in Voyager 1700's (they get hotter than anything I have ever experienced!). I noticed a big difference when idling in traffic for long periods of time but not much of a difference at highway speeds (um, for this old lady that would be 80mph, lol). And, we live in Tucson, where the summers are so hot that the devil goes back to hell to cool off.

Cat
 

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If your engine temp idiot light is staying off, and you have no issues with coolant boil overs, your engine is not overheating. Yes running at 85+ mpg in 100+ degree temperatures will make the engine run on the hot side of it's operating range, the fan is just doing it's job to try and cool it back down if it's running all the time.
 

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Ditto to the above responses.

If your lights aren't on and there's no overflow, it's within the bike's specs. But i hear you; I'd be concerned if the fan kicked on while on the highway too, even if it was 110°+.

The water wetter in the coolant will certainly help it get rid of the heat faster.

When i was there, i changed my oil twice a year... summer was 20W50, winter was 10W40 and a new filter.

I do have one other suggestion, however. I think that the valves are due to be checked at 15000 mi (not sure about that). Incorrect valve settings could cause more heat too, so that's something you could check.
 

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Yeah, I hear you on the water temp. But what about the oil temp? Which is much more critical than water temp. If that fan is running all the time that sump is blazing. Plus, he likes to cruise around in the triple digits and unless he is running synthetic, that dino is gonna break down pretty quick.

Also make sure you don't have one of those fancy chrome farkles across your radiator, like a dragon, Vulcan emblem, or smiley face.
 

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I've seen posts that the stock fuel mix is fairly lean and will make the bike run hot. Could that be contributing to the heat. I've noticed my 900LT to be fairly hot on my right calf this summer and we're only 95 degrees here in TN. Of course its high humidity to go with that so feels like 110.
 

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I've seen posts that the stock fuel mix is fairly lean and will make the bike run hot. Could that be contributing to the heat. I've noticed my 900LT to be fairly hot on my right calf this summer and we're only 95 degrees here in TN. Of course its high humidity to go with that so feels like 110.
You're right about the lean mixture. I have been studying the Power Commander V and may go that route. But will have to spend more because I like writing my own maps. The rear cylinder is the problem, it runs hotter and leaner.

I also read a lot of people saying don't worry unless the light comes on. Do you know what these lights are commonly called? Idiot lights. For good reason. #1 you are an idiot to trust the thing. #2 You are an idiot for letting things get that hot.

If you are not running at least a 20w50 oil that is a synthetic or even a 20w60in that heat the bike will run less efficiently. The bike will run cooler and better with a heaver weight oil. There is no idiot light for oil temperature and oil is the life blood of all engines.
 

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Discussion Starter #15
Ok, so I decided to flush out my radiator and put new coolant in. I got engine ice, flushed the radiator and put the new stuff in.

Now when I go above 50 or so my temperature light comes on. Anyone know what is going on?
 

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Ok, so I decided to flush out my radiator and put new coolant in. I got engine ice, flushed the radiator and put the new stuff in.

Now when I go above 50 or so my temperature light comes on. Anyone know what is going on?
I was in Phoenix 3 weeks ago, temps were in the 111F to 117F range, 2 up, towing a trailer, and i run full synthetic oil, my fan was cutting in and out a fair bit in stop and go traffic and construction, not at highway speeds though, i got my bike serviced at Apache Cycles on Camelback west in Phoenix and asked the service manager about Engine Ice and simular products, his advise was forget about it, just run the regular coolant as its the water in the coolant mixture that does the actual "cooling". I never did have any issues with the bike, but then i was'nt doing 100 mph either. Give Apache a call, they may be able to help.

BTW was the engine ice pre mix or did you have to add water to it ???
 

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I located another coolant additive made be CRC. Small track nascar guys been using it for years. Haven't read specs regarding aluminum engines. Anyone know about this ?
 

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I located another coolant additive made be CRC. Small track nascar guys been using it for years. Haven't read specs regarding aluminum engines. Anyone know about this ?
 

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You need to use the fluid recommended by the manufacturer. There's several different types of coolants on the market and aluminum is the least of the problems. The seals and gaskets are not compatible with the different formula's. We got Ford, Chevy, Dodge, and the overseas variety market to thank for this mess.
 
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