2007 VFR800 Runs Hot ?

Just cause it boils at 212F at sea level dosen't mean it stops gaining heat once it boils. I think you could get a pot of water to reach higher than 260. Somebody quick, go get a thermometer and try to see how hot you can get it!!!!!!!!

 

+2 for me, was stuck in traffic (50- Kph max speed) ambient temp was about 27 C (80 F) Engine temp climbed up to 130 C -(266 F). Shut the machine down for 30 min and hustled back to dealer. 120 kph in fifth gear Bike held steady at 122 C. Check in 20 minutes to close and the day of warranty expiry-> Techs see engine Temp at 130 C but the bike comes back clean. They said it was an "aberration" and it should not happen again.

 

I said to put COOLANT on the stove not water.

 

Sat in traffic on the HOV in VA and my bike hovered around 215-220, summer has been a bit on the warmer side here and I have to get used to my nuts roasting. Buddy says that it is normal for V4-Twins being that a jug is pointed straight at you thought the radiators would do a bit more :VFR1200F:....used to riding straight 4s like my old Yamaha FZR600 Thundercat

 

If the radiator cap is functioning correctly, it will effectively raise the temperature at which the coolant will boil. The higher the setting of the prv (rad cap) the higher the temp until the coolant boils, typically they are around 15 psi. The prv setting is also determined by the safe pressure that the radiator can actually handle.

Threadjack over, my apologies.

 

Actually, pure coolant without a 50/50 mix, will boil much lower than when mixed with water. Also, the main reason the boiling point is raised, is because it's a pressurized system (higher pressure=higher boiling point)

Edit: and why the hell would you wanna boil coolant on the stove, that crap stinks in an open area!!!!!

 

At sea level, pure water will reach 212°F. Adding heat at this point won't heat the pot of water further. The added energy will be used to the 'heat of vaporization' energy to convert water to steam. Impurities in the water (such as minerals in tap water) will raise the boiling point a bit, but not a WHOLE lot.

Fun fact, this is the principle that a rice cooker works off - it changes from "cook" to "warm" when the temperature of the rice bowl goes above 212°F. That means that at that point, energy is no longer heating water/creating steam, but heating the bowl itself (i.e. no more liquid water to convert to steam).

 

Well, that acutally makes sense, but I've never tried it myself. Can I get some pepper and hot sauce for this foot please.............:doh:

 

:lol: sorry dude I just so happened to read that tidbit about the rice cooker last week and it stuck in my head.

 

runs hot

I've been a mechanic for over 30 years. Mine started to do that on a ride across the midwest this summer. Replaced Thermostat. Now back in the 180s - 190s if it's near 100.

 

Scottyx42, Does your bike have aftermarket exhaust and a K&N? That was why my bike ran hot (see above). You can check the thermostate and rad cap (see Donald branscom above)

 

vfr runs hot

My 02 ran very hot (above 200, and as high as 225 at 70 on the highway)this August going across the midwest during a heat wave.
It was mostly the thermostat, but another significant contributing factor was that all the seals (foam strips) in the vicinity of the radiator were deteriorated.
I replaced the foam, and went way nuts making certain the radiators were sealed against air leaks at the side fairings, and it runs an additional 10 degrees cooler after making certain ALL the air goes through the radiators.
Of course now it's cool, and i'm back in the Colo high country, so I guess I'll have to find an excuse to go to Moab, where it's hotter.

 

Moab...The car show is in Apr so thats out ( but it is a good time ).