Ducati Monster Forum

Not sure if anyone else has this problem, but my 02 Monster 750ie has a tough time keeping cool on hot summer days.  I've seen the temp as high as 225.  No obvious problems but I just don't want to do long-term damage.  Is this normal? And if not how can I get the temp down?  I'd like to put a bigger/better radiator on it but I can't find one. I've heard of using water-wetter and different oil and stuff but they seem like bandaids on too large of a problem.  Any advice would be greatly appreciated.

225 isn't that hot.  I requently see 240 to 250 on my M620 and that's within acceptable range.  Do a little search on the forum and you will find the answer.

I probably wouldn't put water wetter in that "radiator"  ;)

That temp isn't that hot, but a radiator from NCR or Febur for the newer bikes can fit yours. They provide more cooling, and are light weight. They also cost a bunch.

Your radiator is an oil cooler only. Do not add anything to your oil like water wetter to take care of this.

Last question, are you in traffic a lot? Or are you getting this higher temp while out running about with few stops

225 is nothing, that's normal operating temp. once it gets to 310 or 320 it will flash 'hot' My old 620 usually ran at 260-280. your perfectly fine.

My 620 ran like paperstreets. 225 is just fine. You don't have a temp problem at all

225 seems a little low to me actually... ;D

Haha, okay.  Thanks everybody.  I feel a bit better, but I run with crotch-rocket guys a lot like 'busa's and gsxr's and they always seem to stay around 180.  Different bikes.  Thanks!

different bikes with humongous radiators.

There's also a difference between water temp - what those bikes are reading and the case/oil temp that you're reading.

This past weekend on my S4, I was sitting in a bit of traffic going through a town and the temp got up to about 230 and then "HOT" started flashing on my gauge. THe fans didn't kick on. Is this a water temp or oil temp?

That's the coolant temp.  Check fuses first.

Coolant temp shouldn't get above the "boiling point of water + coolant range" (230 degrees, or ~110C)

Oil temp... I've heard varying opinions, but generally most folks seem to agree above 300 degrees is starting to get too hot (~150C) with an upper limit of 350 (~180C)

Coolant temp measured post radiator, oil temp measured from the sump.

Anyone know the temp at which my fans should kick on?

Help me out? I'd like to know if my 620 runs like paperstreets!

I'll repeat what others said just so that it's clearly spelled out.

Your monster is air-cooled.  It has no radiator and no coolant, just an oil cooler.  You're seeing the oil temp.  It's running temp should be in the 200s.  It could be lower if it's cold out, but don't worry unless it heads over 300. 

Your friends' bikes are water-cooled.  They have radiators with coolant.  They're looking at coolant temp.  It should be below boiling point of water and generally in the high 100 range. 

Spidey, the OP is gone and we have a new guy with hot motoritis

http://ducatimonsterforum.org/index.php?topic=36244.msg636393#msg636393 (http://ducatimonsterforum.org/index.php?topic=36244.msg636393#msg636393)

Ah, missed that.  OP has an aircooled bike (750).  lazylightnin717 has a water cooled bike (s4).   So, yes, 230 is your coolant temp and it's too high.

Oh geez. I thought that huge thing with fans was an oil cooler...  [roll]

Seriously though, I would love to learn how to add one like the s4r! I like the way the oil coolers fill the front end

Back to my other question tho-- Anyone know the temp at which the fans should have kicked on? Is the obvious answer "sometime" before HOT started flashing?

Haven't had a water cooled duc but my old yakawazukda was around 200*

I think it is supposed to be between 185-205, from experience with cantankerous cars. If you are getting 220 or more, this is too hot.

Had a sneaking suspicion that was going to be the answer. Thanks guys!

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