Does the fan come on? It should long before the red light does... fan should come on around 208F and the light at 248F. If the fan isn't on when the red light is on then the fan circuit needs work.
BUT, the cooling system works well enough (when working properly) that the fan should only be necessary if you're at idle for a long time, moving around VERY slowly or pushing the quad REAL hard for a while... so, if it's overheating (red light on) while riding normally, the cooling system (radiator, thermostat, water pump, fan) is having issues and needs a good looking at.
Is the airbox intact or open/modified? Without knowledge of airbox and exhaust mods and what main and pilot jet numbers are currently in the carbs, we can't tell you whether a change might be necessary.
'01 660 Raptor, Burgard +2+1 arms, YFZ Shocks, LSR anti-vibe, CTR pipe, jetted, K&N
'01 Polaris Scrambler 400, K&N
'02 Honda 400ex, Big Gun pipe, jetted, K&N, Lonestar +2 A-arms, Lonestar anti-vibe
'04 Suzuki LTZ400
'16 RZR XP4 1000 Turbo
Last edited by QuadManiac; 08-29-2019 at 07:52 PM.