Help

[Jason55863]

I have a 2009 viper 150 recently got been having problems with it bogging down and back fireing when accelerating has good gas changed the spark plug cleaned air system and also put a brand new carburetor and fuel filter and still having the same issues any advice and helP will be greatly appreciated thanks

[Goob]

I have a 2009 viper 150 recently got been having problems with it bogging down and back fireing when accelerating has good gas changed the spark plug cleaned air system and also put a brand new carburetor and fuel filter and still having the same issues any advice and helP will be greatly appreciated thanks

Just a guess, but I would check your valve clearances and get them set. Could be tight.

After that try jetting the carb as needed. From what I understand (and someone correct me if I am wrong) backfiring at the carb it is too lean, backfiring at the exhaust is too rich. Sparkplug checks are critical to narrow it down too.