had a montesa 4rt befor the evo 
choke and hot start both in. it was like that befor fitted new kill switch 
just thot it was down to being new but was ok when had it first time out  
did not start playing up till later on in the trial 2nd time out 
would take it back to dealer but 6hour drive to do that going to check the carb the night if still the same just put it to dealer 
thanks for the tips