Temperature problems?

[JaimeV]

Don’t you think that this bike works at too high temperature?. In my case I mainly ride off road and therefore frequently go to low speed so the fan runs constantly and the bike is about 100 ° C. Since I put the new exhaust it work’s cooler but I still like cool it more.

I find that the lower radiator part is quite obscured by the plastic side, I'm thinking opening this area by placing a grid, what do you think?
Another option would be to put an oil cooler under the lighthouse.

Has anyone done this?

 

[Koinz]

According to the manual - the Thermostat is fully open at 84 degrees Celsius. Rather than messing with the cowling, you might want to see if Yamaha has a cooler thermostat or remove it altogether. I have a feeling someone is going to come up with an extra radiator mounted somewhere else to aid in cooling during slow speed off roading use. ;D

 

[Don in Lodi]

212 degrees ain't too bad. As noted elsewhere, most modern fuel injected vehicles these days run in the 220-230 range pretty regular. The days of running at 170-180 just doesn't translate real well to the highest fuel efficiency and emissions standards the the whole world seems to be looking for. As long as the fan is pushing air across the radiator's grid, it is cooling as good as it gets. Opening the enclosure up will not increase the actual flow and may actually disrupt the flow pattern, fluid dynamics, of the fan's system. Putting a cooler thermostat, or removing it completely won't help on it's own, the fan still comes on at it's predetermined temp, what, 220? 218? The fan temp switch could be replaced with one that switches sooner, say 200... then a 180-190 thermostat could be installed.
Hmmm, aftermarket aux cooling fans for autos sometimes come with an adjustable thermostatic fan switch. A manual switch is too cumbersome. An aftermarket switch/sensor, a fan rewire w/relay w/fuse, cooler thermostat, don't just remove it... yeah, it could be done. Could even play around with a two speed setup, slow speed real early, to slow the spike down, then high speed when the spike gets there.
Next question would be is closed loop dependent on engine temp at all... On autos its the heated O2 sensors that the closed loop is waiting on.

 

[markjenn]

Sounds like its working about like every liquid cooled bike I've owned. They all run their fan anytime speeds drop below about 30 mph or so. I think it is designed to work this way and I wouldn't bother trying to make it work differently. The thermal characteristics of bikes must be different than cars - when you size a bike's radiator for worst case cooling requirements (high speed in hot weather), you end up with a cooling system that requires the supplemental fan to kick in quite often.

A different thermostat isn't going to help - its wide open at a fairly low temp.

- Mark

 

[hANNAbONE]

...what Mark said...

 

[JaimeV]

Ok, thanks... probably I need to be confident with the vent. I my previous bikes I didn't had any.... ::008::