Overheating

7775 Views 22 Replies 12 Participants Last post by Bevo, 10 d ago

BigOne-94-14

Discussion Starter · Jun 7, 2014

I was sitting at traffic lights this afternoon and noticed that my CB's temp had reached 220f. Now I know that the fan should cut in a little higher than boiling, and 220f is 104C, so not too bad ... maybe.

When I got home I let the bike sit on idle for 5 minutes. The temp climbed to 234f, 112C which is starting to sound kinda high to me. I read elsewhere that the fan should cut in round 103C.

It sounded to me like the fan was running. According to Weather.com the temp was 80f here at the time, though in full sun it feels more like 95.

So to my question - is my bike about to explode when the temperature in the shade hits 95 on Sunday?

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tbutera2112

· #2 · Jun 7, 2014 (Edited)

I forget what temp my fan kicks on... But it's fairly high just like yours... It gets so hot here that my bike runs hotter while riding because the air outside is so hot over radiator... I've seen 220s-230s while riding on the freeway here

Is your fan not kicking on still at 234? I've ridden in 115* and never had overheating problems, but it did run hot

I'd offer to take it for a spin and let you know, but it's torn apart for powdercoating right now

I think these bikes just run hot... But I've never had issues... It got up to 119 last summer here

sovrec

· #3 · Jun 7, 2014 (Edited)

...from experience the fan cuts in at around 103/4 degrees C engine temp - this then tries to cut or stabilize the temp - the bike does get hot very quickly in standing traffic but once moving the temp should reduce quickly - Is there not a warning light that comes on if the bike senses that temps are excessive ? Obviously running too hot for prolonged periods is to be avoided - how do folks in hotter climbs see this ? In the UK it's like a special event if the weathers hot enough to kick the fan in !!!

tbutera2112

· #4 · Jun 7, 2014 (Edited)

It doesn't get much worse than summer in Phoenix... And I've never had it overheat... Like I said, it's so damn hot here that your bike will run cooler at idle than while rolling in the summer... No warning lights, no lack of performance.. Motorcycles out everywhere in this weather... He should be fine... He's worried about 95 which isn't even that hot... Think OP is just paranoid (I was too when I first got the bike)

Speaking of hot... Beginning of June and here's our forecast... Going to be a hot summer, especially a month from now when we get further into summer

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mel b

· #5 · Jun 7, 2014

tbutera2112 said:
Speaking of hot... Beginning of June and here's our forecast... Going to be a hot summer, especially a month from now when we get further into summer

Yeah cheers for this mate just what I needed to see as I sit and watch the rain bouncing down outside - Grrrrrrr

@ BigOne my fan kicks in at 101 ° but it's rare to see in the UK.

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Eldon

· #6 · Jun 7, 2014

In traffic the temp rise is quite quick and easily gets to 104 when the fan kicks it back down to around 100. This can cycle on and off frequently if stood or crawling for a while. Once moving and some draught hits the radiator the temp quickly returns to 78 ish.

I wouldn't worry OP.

BigOne-94-14

Discussion Starter · #7 · Jun 7, 2014

Thanks guys. I'll just hav to keep an eye on it till I learn what it does 'normally'

Granted, idling for 5 minutes in my driveway is not normal driving ;-) 234 still seems pretty high. If I ever get stuck in heavy traffic on a hot day I'll be watching closely because it seems clear that the fan cannot cool the engine fast enough once it's hot and stationary.

Scribble

· #8 · Jun 8, 2014

My fan usually kicks in at 104 or so when i'm stuck in traffic.

COLVERT

· #9 · Jun 8, 2014

Over 90 degrees fahrenheit over here today. 30 degrees centigrade plus. TOO HOT for biking !!!

Bike fan cuts in at 104 c-----drops to around 96 then cuts out. Your engine will get up to quite a high temperature before it overcomes the pressure cap and the coolant starts to boil off !!!!

Not sure at the moment what the cap on the CB is rated at. Someone will know, I'm sure, how many degrees hotter each PSI of the cap will give.

BigOne-94-14

Discussion Starter · #10 · Jun 8, 2014

90 isn't too hot ;-)

At least, not so long as you keep moving. Steer clear of city traffic. Stay over 80mph

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tbutera2112

· #11 · Jun 9, 2014

Find a sunny spot, sit there for 15min and get super sweaty.. Start riding and let the wind cool you off while wet... Mexican A/C

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BigOne-94-14

Discussion Starter · #12 · Jun 9, 2014

It was indeed at least 95 here today. The only way to get cool was basically this. Get warm and sweaty, then let the wind blow off the sweat. It is amazing how much heat the roads radiate

Bike didn't blow up, which is a good thing.

Jaydee

· #13 · Jun 9, 2014

Yeah nothing to worry about mate..It gets bloody hot here in Australia and at times it's over 40 degrees outside and even hotter in the sun..Like most bikes my fan kicks in around 104 but there has been times when the fan just can't keep it any lower and it has reached 108..As long as you have the right coolant and the radiator is unrestricted,there is nothing to worry about..

sovrec

· #14 · Jun 9, 2014

I don't know how you manage with those temps ! - it was about 20 degrees at peak yesterday but humid but with little breeze and I was already sweating in my bike gear - I do like a sunny day but personally I struggle with the heat - for the UK the bike seems to handle most situations really well (oil / coolant etc) but it must be one heck of a challenge for territories that have wild extremes from winter to summer !

Personally I always wear a baselayer (ProSkins) and this definitely stops your T shirt etc getting sweaty and keeps you fairly cool ....

BigOne-94-14

Discussion Starter · #15 · Jun 9, 2014

As a Scot, I find the California heat not too bad. But I lived in Mississippi for 7 years. The heat plus humidity there can only be described as sheer effing hell in the summer. The only way to ride in the summer is in shorts and t-shirt, no matter how stupid you think that is.

California's dry heat is, by comparison, a doddle. But if I had come here from Scotland on a visit, I would probably have about died in yesterday's heat - 35C in the shade!

DELuth

· #16 · Jun 9, 2014

HAHA Yeah, it's hot down here right now. The trick is to keep moving. I ride in helmet, jacket, gloves, boots, and jeans every day.

Andrewzzz

· #17 · Jun 9, 2014

Alpinestars air gear ftw in summer (when its not raining!). ;-) My runs 75-76C when on motorway, 85C when moving on light traffic and 100-104 in stationary London traffic, fan kicks in at about 103C.

G

· #18 · Jun 9, 2014

Andrewzzz said:
Alpinestars air gear ftw in summer (when its not raining!). ;-) My runs 75-76C when on motorway, 85C when moving on light traffic and 100-104 in stationary London traffic, fan kicks in at about 103C.

So its only your front brakes that boil then

not the engine

Andrewzzz

· #19 · Jun 9, 2014

Your head boiled today from what it looks like.

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G

· #20 · Jun 9, 2014

Andrewzzz said:
Your head boiled today from what it looks like.

Yeh it did,knelt down looking at your calipers :rollin or chicken strips :thumbup

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