I have a Honda shadow and need a lil help?

When I roll out of the throttle or down shift it wants to spit and back fire a lil. The spark plugs seem fine. Just to let you know if it helps its a 97 with a carb. Its only been doing this for about 3 or 4 weeks. Also if I leave the choke half out it does not do it at all. So if anyone knows anything that will help that would be great.I have to get it to stop bc the back fire is harmfull to the motor and it sounds bad lol. Thanks

My'01 backfires a little bit. It's pretty normal if you slow down by disengaging the clutch instead of using the brakes. If you want you can have the carb rejetted. That might help. Or you can adjust the idle on your carb.

probably time for some carb work.having to Leave the choke out a little means the air mix isn't righ.

You have an air pump to aid with emission control. When backing down the air forced in is what is causing the backfire. A good mechanic can adjust that. Or you can find the small hose and cap it off which will stop the backfire but cause your engine to run rich.

Sounds more like there is some water in the tank. Put a can of"dry gas"into the tank, and see if that helps. Having to keep you choke out a bit, means that the gas/air mixture isn't the right levels, again, which sounds more like there is water mixing in with the gas. Since your tank isn't a sealed tank, water vapor can occur, just by letting it stand outside on a humid day, after the engine gets hot.