I just installed an X charger, 42's, and a 4" Kanaflex. After a few minutes run, if I hit full throttle, the hi temp buzzer goes off. My dealer says compression is good, and he pressure checked the cooling system and it's ok. I had also installed a 160 Rotax thermostat, and when it heated up, I put my stock thermostat back in, but it did the same thing. Any ideas?