Wr400 cooling issues

Got a 98 wr400 and while riding in sand In a convoy of cars last night temp was sitting up around 106°C doing about 25 Km/H. I have recently installed oversized alloy rads but no help??

I installed some computer fans on the backside of my rads, wich seem to help a lot ( could be the colder weather though ). And i richened up my mixture to get rid of the hanging idle... I can let it sit on its stand running for a while before it overheats.

First thing i would check is the mixture, getting that right will fix more than just the overheating.

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