(2003 Honda Superhawk)
I have ran into a issue after winter storage with my bike. I'll run the bike for about 30 minutes and after it's warmed up I notice that when I'm decelerating or even sometimes idle I will hear a POOF sound from below me that stalls my bike. Only once has it happened while around 4k rpm but it didn't shut off due to me still being on the throttle.

Would this be a carb issue or maybe a vacuum issue? Hopefully someone has had this same issue and has a fix. Like I said it runs perfect until after its warmed up and every once in awhile it will make that sound and stall.


Anything will help, thanks!

 

Kinda have to eliminate some basics here. Are you able to balance the carbs and set the tps to 500-525 ohms? There can be many things at play here. I’d want to tear mine down and meticulously clean them (carbs) if you haven’t in a long time. Check the condition of the diaphragms. Check the condition of that air filter, making sure a rodent didn’t nest in there. When was the last time that was looked at?

 

So far I have checked the air filter and what looked like the vacuum lines and everything checked out except for a tiny amount of what smelt/looked like oil in the air box. I would have to look up how to adjust tps and how to clean the carbs as this is my first carburated motorcycle. I know the engine does run a little rich from the smell but I never had a issue until after l she came out of storage this winter. Looks like youtube will be my friend for balancing the carbs haha

 

Have you been running ethanol added gas in the bike as that may have a play in your issues too.
If you're not adding a fuel stabilizer to your fuel when having an extended off period the ethanol fuel can absorb moisture and fuel will gum up over time.

Good luck and welcome to the world of carburetors. 😉😜👍

 

Where are you located? I know I would help out if you were close, and we have some other fine folks who might do the same.

 

always ran 91+ and 99% sure no ethanol but I definitely should have ran some fuel stabilizer 😂. But that is a good thing to note down to check the lines there, thanks!

 

I'm located in southwest Missouri. Sadly none of my family has worked on carbs long enough for me to have a good amount of help so I'm on my own with this one haha. That's if it's the carbs of course. I'm going to try and diagnose what you had said before digging into that carburetor. Im hoping it's just a vacuum line but it sounds like it's near the carbs where something pressurized is releasing and stalling the engine😬

 

Sounds like what we call the carb farts. It's not uncommon. A good balance and that tps calibration can help.

IF you do dig into carbs, be very careful with the choke fittings. They get delicate and break easy.