I just got my 02 Raptor back after a rebuilt tranny, added a 11:1 Weisco piston and the Pro Design/K&N air filter kit. I ran in the cinders and noticed the overflow tube from the coolant reservoir had spilled coolant on my rear swingarm after hard riding. I did some more mellow riding in the desert at a later date and noticed a small amount of overspill from the overflow tube.

Is this normal? I never noticed the overflow before the mods listed above. Are you guys noticing this overspill after a high compression piston was added? I was thinking about swapping out coolant for engine ice.

 

I haven't had the prollem yet?

 

sounds like a headgasket.

 

If its a defective head gasket, will I notice coolant in the oil?

 

Mine does the same thing. it started light like you said but only got worse. I noticed after hard riding and the temp light would come on but the bottom of the radiator is just a little warm the top was very hot. I changed the thermostat and it helped but still the water temp light comes on. I'm going to flush the radiator and check the water pump. I'll keep you informed

 

Sounds like a head gasket to me too.

 

yup, ditto on the head gasket.