What temp does your fan kick in?

Hello everyone, I curious to know when everyone's fan kicks in. I have yet to hear my fan kick in. Temp was at about 178 and no fan. I think the thermostat starts to open at about 183, but still no fan. Can't ride it yet, since the chain needs to be changed, but have let it idle for a while after I changed the clutch. Getting it ready to get inspected, just wanted to make sure the cooling system is ok before I start to put everything back together. There is no leaks, I have flushed it and put new Honda coolant. Everything looks good from the outside.

 

My fan cuts on at 223 degrees F and cuts off at 209 degrees F.

 

Thanks guys, makes me feel a whole lot better!! Hopefully I will get the new chain installed tomorrow and take it for a ride and see if the fan kicks in after 220. Not use to the whole digital gauge, can't tell when its dangerously hot :kaboom:

 

I'm not sure what generation bike you have - there may be differences... But with the 6th gen., the fan turns on from a temp sensor in the left radiator. But the temp that is displayed on the dash is from a sensor in the front cylinder head. So there isn't an absolute relationship between the gauge temp and the fan coming on.
I don't know if this helps or hurts for your peace of mind, but don't be upset if your results are not repeatable or don't agree with some other bike.

 

(5th gen bike) After a ride I was just about to shut off the engine and because I was parked I was able to hear the fan kick in. I looked up and the sensor showed 218°F.

 

On all my (non-fi) earlier bikes the number 100C. is stamped on the thermoswitch, so 212 F. I have no idea why FI bikes turn the fan on so late. Thermostat opening temp and fan switch operation are independent and unrelated.

 

The 5th gen switch should bring the fan on at 98-102C according to the manual.

 

Interesting question. I'm not to sold on the lcd read out on the 5th, almost a pain to read quickly. who has time to stare ? due to it's location and lighting leave a sour taste, not much better at night either IMO, oh well , that's tech for ya, Now on the 4th, and since I had one for like from 96 -2010 I got use too and still prefer simple yet accurate analog gauges. i knew when the fan would come on just by a quick glance of the gauge. Now that I have a 5th in the garage, No not whiskey I wondered when or if the fan worked, just so happen on one outing it was warm enough, mid 90s to get the viffer nice and toasty. I heard the fan come during a stop, it was a sigh of relief to know it works and the fancy hard to read digital read out numbered 214.

 

My 2004 comes on at 103° C without fail

 

My guess is that they use every effort to preserve electricity on the motorcycle.

 

(5th gen) Well my fan finally kicked in after about 223F and it took forever to get it there lol at least I know now it works and cools the bike down. Thanks everyone! Now to the front suspension....

 

My thermostat opens at 172.
My fan comes on when ever I turn the switch on.
When I am stuck in traffic and the engine gets over 180, I kick the fan on.
After I get moving fast enough for the airflow to start over coming the fan, I kick off the fan.
Unless you convert to a front mount radiator, this is as good as it gets.

 

Nah, you can change the thermo switch for any temperature you like, mine is a 90c one, but I need to replace with a 95c one, Just to reduce fan use.

You can also convert to a VTR fan blade, which pulls air from the front & pushes out the side, same as when moving, so shuts off sooner. I also added a hi flow PC fan to the right rad, which helps.

 

I tried the VTR fan, It was horrible in traffic and would not cool my bike off, unless I was moving over 30 mph, it would only maintain the temperature at around 225 and not lower it. I also tried the lower temp fan switch, with the vfr fan it would result in the fan being stuck on on the highway and not being able to kick off, as the vfr fan blade fights the natural air flow when over 30 mph or so. Then I tried a lower temp fan switch with the vtr fan which was great as long as I stayed above 30 mph but the bike would not cool off in central florida summer traffic. The standard vfr fan blade and a manual switch was the only thing that worked for me.

 

Check the inside of the rad as VTR fan blade without stone guards will bend all the fins over if it picks up the right side stone.

 

The radiators are still like new, the reversed airflow of the vtr fan blades just didn't work out for me. Blowing hot engine compartment air across the radiator at a stand still would not cool my bike off in hot traffic. Maybe it worked out better for you with the supplemental second fan and cooler climate in the uk, but I didn't feel comfortable with the vtr blade or low temp switch over here. Believe me, I tried, Norcal Boy busted my balls to no extent trying get me to just simply try a manual fan switch, but I had to try all the other options first and he was right, that was the only one that worked for me.

 

This is the golden ticket IMO- and it gets no cheaper or simpler. Part also fits the RVT, VT1100, VTX1800 and a LONG list of other models.

http://www.ebay.com/itm/RADIATOR-FA...ash=item27dd3f7bc5:g:Pk8AAOxyUrZS0kC4&vxp=mtr

I've seen a ton of mods addressing the V4's hot temper, many of them requiring lots of different parts and a lot of work.

I thought about a manual override of course, but no way did I want to constantly think about wax-on wax-off!

I saw temps of 230 in slow traffic over the summer months. The issue with the 100C factory cut-in is, by the time the fan kicks on the engine is already heat soaked.

The fan will only cap the temp there, it is not sufficient to bring the temps down by any significant measure.

I have seen temp drops of ONE degree per minute, until I got to 35-40 mph again. That kinda shit plays havoc on your mind, and damned uncomfortable to sit on!

The factory fan is adequate provided the temps are dealt with quickly.

85C/185F cut-in is a bullseye, just my opinion and YMMV...

I wish I'd done this in the summer months, it would have spared me a LOT of stress!

 

So you want the fan to turn on at 85C or 185F? So if it turns on at 185, its going to switch off at what 175? Guess what? On a hot day, the cooling system is not capable of cooling the bike down to 175. You install this low temp switch and the fan will come on and never turn off. Especially if you pull on the highway, with the fan on, then you're really up shits creak.

Sent from my A0001 using Tapatalk

 

I realize there are too many factors to call this an absolute cure-all.

Variations in climate and humidity, as well as variations in overall cooling system health.

My temps (gen 6) on the highway are 167-168F no matter the ambient temp, at anything over 45 MPH.

If I decide I still need a manual bypass switch, so be it, and not a big deal to do.

I'd still much rather the fan switch do my worrying for me and catch it before temps go nuclear.

Stressing and staying fixated on the temp display is not my idea of an enjoyable and low-stress commute.