What should i be running for coolant in my 426? 50/50 i hear for winter but wouldnt water be better for summer. I know i should be moving to prevent overheating, but i start boiling when im messing around in a field popping wheelies and such. If i have to run it 80 across a beanfield all the time to keep it from getting hot i will ghostride this thing into the river. Fixed the water pump weep hole leak problem with the help of yall. All my packing in my silencer blew out, now i think i have two things to work on. Overheating and backfire on deacceleration(which wasnt happening before i fixed my wp seals and blew out my silencer). I am going to follow the old posts for setting the idle and fuel adjustment as im sure this is part of the problem. What is the best coolant and mix for a YZ426? Currently running Peak 50/50. Save your time and dont mention engine ice or other $30 a gallon coolants please.