[tomstain]

Hey, anybody out there have any good ideas on why my 450r might be overheating in tight single track? Beside the guy who might say that the R is not meant for trail riding, it sure is fun to kick rear in the woods. Here's the setup: crunched a radiator and just got a new one (stock), new Boyesen Hi flow water pump, Flatland radiator guards (without stock louvers installed), new radiator cap, and running Engine Ice as coolant. Put some temp strips on and the temp runs about 170 on the jeep trails and gets hot to 190 in tight single track. Overheats if there is any hesitation in the single track. Overheating to the point that its just not a little coolant but 1/4 of the radiator. I am typically riding at altitude with the jetting at the factory setting, which I believe is about sea level. Bike starts great and runs great, just doesn't seem to keep from spewing.
Thanks in advance.

[bullitproof gimp]

i have not had any heating problems yet but all i have done with it to this point is mx i will start my h/s season in about 2 months i have been wondering myself if i should look for cooling fixes before i start i have an 05 450r i think i will play it by ear first mybe you should look into an oil cooler

[braap207]

Well as for overheating you do have to take into consideration the temp outside, its been hot here in Utah for a few days... There are many things out there that say they will help reduce heat and kewl the bike faster I've tryed about all of them and still get some spatter from time to time, not a big overflow but sitting on any line for more than a minute with the bike running and I'm spitting out my expensive engine ice or water wetter I see you said you were riding sea level, just where would that be? I looked up SLC and it was above 4500ft and park city starts at around 6900. So you may want to stop by and pick up a jet and try that I think I put in an FMF 165... If your still having the problem you may try the new radiator shrouds with kinda air scoops on each side, I've also tryed an inline super cooler and I've got an extra if you need it. Also are you running race fuel or pump? I seem to spit a little more with the good stuff.