Bikes with carburetors usually have a breather hose that releases excess gasoline. It doesn't connect to anything at the lower ende, it's a "dump" route. If it's it doing this a lot, it means the float(s) in your carb(s) are either sticking or set too high. This causes excess gas in the carbs, and the breather tube is getting rid of it. You have to take off the bottom of the carb(s) in order to check the floats. Look in a service manual or online for how to do this for your model.. and don't smoke while you're trying it!
SOURCE: engine only runs with choke on
dear honda 750 your problem is a pluged main jet you must completley disasseble the carbs and give them a good cleaning with carb cleaner and comp air visually check to make sure you can see light through the jets after cleaning. your choke system by passes the jets that is why it runs on the choke setting only. hope this helps jim
SOURCE: 1984 aspencade starts w/choke and revs up, runs smooth. Take off
My 'wing won't run unless it has been warmed up some. I would suggest that you r&r your carbs to make sure the jets in the bottom are working correctly. They tend to get plugged up, especially after sitting & the aluminum flaking off inside... Rick
SOURCE: 1999 HONDA 1100C3. RUNS ROUGH AND QUITS WHEN I REMOVE CHOKE.
I think you are exactly right. Sounds like you have some clogging in your idle jets and probably in need of a carb tune up. if you havnt replaced or cleaned your air filter in a while, now would be a good time to do that as well, being that some filters begin to break down and pieces of them get into the carb ports and cause clogging.
SOURCE: I have a VTR 1000 Firestorm 1998 which is a pain
Check that you choke slides are shutting off properly and the mechanism is operating fully .
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