hey i have a new 420 honda that i have had a tone of trouble with it is stalling and running eraticaly when it gets hot no power.the problem only happens when i am useing the bike very slowly (1st gear)it is worse on hot days better on cool days i have had this bike into the dealer 3 times and they cant find anything wrong with it i have checked everything i can think of and have concluded that it is vapour locking i would like to know if my quad is the only one with this problem i have also had a 07 rancher 400 do the exact same thing so if anyone wants to give it a try for me get your bike warmed up then switch it into 1st and slowly ride around a hill is best get it warm so that the fan comes on then go a few minutes more stop the bike and justlet it idle then ride a bit more if it is the same as my bike it would show the problem thanks guys