Hello, have a 2004, 350 bruin, 2900 km. Motor never been touched,just put in new s-plug. My problem is when on idle,shifting from fwd/rev, the motor gives a "puck" or sputter & shuts off. does restart no problem.( does this frequently) Could it need a valve adjustment or carb adjustment ? or both.any help would be great. thank You.

 

i'd say start with the easy things first CLEAN THE CARB if that dont help then it may be the valves

 

Thank You, haven't ran it yet,but put some carb cleaner in & a little stablizer. Bike sits alot,so some are saying with the ethanol in the fuel,i may be getting water, going to throw in a little menthal hydrate as well. Going on a run this weekend, so i'll see how it works. Some are saying to use "high test" gas as well. Tks.