Temperature Question

Message

sidestand · #1 Post by **sidestand** » Sun Aug 10, 2008 5:34 pm

Anyone know when the radiator fans are supposed to cut in
Mine don't until the guage shows 97 degrees ! even then, only the left fan cuts in & drops the temp down to 95, then stops
Is this normal ?

fastasfcuk · #2 Post by **fastasfcuk** » Sun Aug 10, 2008 5:45 pm

the temperature is spot on, but both fans should kick in so that needs sorting.

sidestand · #3 Post by **sidestand** » Sun Aug 10, 2008 8:51 pm

Ta mate, think I'll have a wiggle of the connections first - followed by an attack of WD40 if that don't work

D-Rider · #4 Post by **D-Rider** » Sun Aug 10, 2008 10:22 pm

The workshop manual states the fans should switch on when the temperature hits 100 C and switch off when it falls to 85 C.

Obviously there will be a bit of tolerance and one bike will vary a little from another.

Hope this helps.

BTW if you haven't got the workshop manual, download it from Martin Poll's website - his website is a great resource .... and he's a forum member

The homepage is here: http://www.martinpoll.dk/index.htm

The Aprilia stuff is here: http://www.martinpoll.dk/div_april.htm

fastasfcuk · #5 Post by **fastasfcuk** » Mon Aug 11, 2008 10:15 am

mine have allways kicked in at 97 without fail, my mates milli's the same.

Nooj · #6 Post by **Nooj** » Mon Aug 11, 2008 11:10 am

Same here, on at 97, off at 95.

D-Rider · #7 Post by **D-Rider** » Mon Aug 11, 2008 11:13 am

Nooj wrote:Same here, on at 97, off at 95.

Mine comes on at an indicated 96 - not surprised that there's some tolerance - even if the nominal is 100.

Your switch off seems mighty close to your switch on though - I'd have expected more hysteresis than that.

sabestian · #8 Post by **sabestian** » Mon Aug 11, 2008 4:12 pm

Nooj wrote:Same here, on at 97, off at 95.

Same here! Both fans!

joecrx · #9 Post by **joecrx** » Mon Aug 11, 2008 4:34 pm

both fans come on at about 97 on mine toand go of about 80

Viffer · #10 Post by **Viffer** » Mon Aug 11, 2008 4:36 pm

'Ere whilst we're on temperature, what temp should the bike run at normally. Mines 68. Sorry for the hijack.

Fausto · #11 Post by **Fausto** » Mon Aug 11, 2008 4:46 pm

I know my fans work coz I looked down once on a very hot day and saw them spinning.... BUT....

What in all the world are you lot doing riding around monitoring your temp readouts and fans?

I can't hear mine and they are probably the very last thing I am watching as I ride.

FlyingKiwi · #12 Post by **FlyingKiwi** » Mon Aug 11, 2008 4:53 pm

Viffer wrote:'Ere whilst we're on temperature, what temp should the bike run at normally. Mines 68. Sorry for the hijack.

I seem to remember 75

D-Rider · #13 Post by **D-Rider** » Mon Aug 11, 2008 5:18 pm

Mine seems to run between about 77 and 90 .... I think it likes 86

scorpio24v · #14 Post by **scorpio24v** » Mon Aug 11, 2008 5:45 pm

mine generally runs btween 76/78 been to 90 once. As for the fans the only time i`ve seen em turning was when they "windmill" with airflow through the rads, but I realy should be looking where I`m going

It would be nice to think the ambient temps will be high enough in the remainder of this summer for me to see if the fan motors work.
Living in hope.

P.S the Honda fan comes on at 105.

D-Rider · #15 Post by **D-Rider** » Mon Aug 11, 2008 6:41 pm

Fausto wrote:I know my fans work coz I looked down once on a very hot day and saw them spinning.... BUT....

What in all the world are you lot doing riding around monitoring your temp readouts and fans?

I can't hear mine and they are probably the very last thing I am watching as I ride.

Don't you feel that surge of thrust when they kick-in and haul you through the air?

(I hear mine switching in and out when I'm negotiating traffic at low speed)