2008 Venture with a misfire, gas starvation, carburetor adj??? HELP PLEASE

[Flash105]

Rode my new bike today and it does pretty good until in goes into high gear, then it seems to be starving for fuel, misfirring, or maybe needs a carb adjustment. 65 was top speed in overdrive, shift down one and it starts pulling again!! Any suggestions will be appreciated. I have drained the old fuel and replaced with new non ethanol along with half a can of sea-foam!!! Also changed the plugs!! Still having issues.

[Flash105]

Also see a little smoke at start up!!

[RedRider]

Have you replaced the fuel filter? Kind of a pain to get to, but not hard to do.

 

RR

[steamer]

sounds like your not hitting on all 4 cyl. these bikes will run pretty good on 3 cyl. until you get up to high speed. another thing to check is you air filters, did a mouse make a home in one of them over the winter? this has happen to a few folks here in the past. check all the easy thing first. you said it is a new to you bike, how long has it been sitting before you got it? how many miles on it? has it been sitting all winter with un-treated gas in it? did you ride it with old gas in it?