Reply To: Backfire/misfire thru carb

[Don]

OK, so the engine has run normally for you before, just started messing up now….
With the carburetors installed, remove the black intake cover and have a look at the butterfly valves with the throttle at dead idle… Make sure the throttle cam is not touching the throttle roller though. Both butterflies should be completely closed. Feel free to post pictures of the throttle linkage when the engine is at dead idle. Go ahead and do a compression test as well…