i have a 650 brute force and when i start it it starts on 1 cilender then when i reve it up it runs on both i cleaned the carbs and put new plugs in it and that dident fix it i was just wondering if eny body could tell me what was wrong with it thanks

 

welcome.

the automatic compression release makes it seem like there is a miss until the engine runs for a little. maybe that is what you are hearing. it is made that way to allow starting with the recoil starter. this is what it sounds like on mine, anyway....

monty