by Z » Mon Sep 06, 2010 9:29 pm
I had the same issue on a KX100 being used for slow woods riding and hills. Using Evans coolant solved all boil-over issues.
http://www.evanscooling.com/coolants/'06 CRF250X / '05 VTX1300C / '03 XR70 / '01 Yamaha T-TR125L / '77 Peugeot 103SP
'07 Blood Hound - dumb! / '02 mutt - smart! / '12 Goldendoodle - smarter!!