Please Help- 97 Supersport 488 Flooding

[Ol' Skool]

My SS 488 is flooding bad after sitting for a while. So bad gas will shoot right out of the cylinders, after I remove the plugs and pull it over. I had the carbs cleaned and tuned last season. Didnt do this until after a few rides this past winter. Any ideas?

 

[starfire72]

When it runs does it run good or does it flood out??could be the carbs gummed up again with the fuel now or could be the fuel pump leaking and filling crankcase through the pulse line.

 

[imdoo'n]

fuel shut off carb needle, float level, first place i'd look

 

[moyiesledhead]

What imdoo'n said.

#34 in this exploded diagram is what shuts off the fuel to the float bowl. If it fills the engine when it's not running, this needle valve is not closing.

 

[Ol' Skool]

Thanks fellas, I will give it a shot. Once I get it fired up it runs good. Little bit of a bog on the low end, but fine once you get some rpms.

 

[steepndeeper]

sounds as if your float needle is sticking open and not shutting off the fuel. Disassemble and clean thoroughly. Drain fuel from carbs before summer storage to prevent future problems.

 

[snopro]

Check the tip of the needle to make sure there is no groove as well that could let gas past the seat. It is either the needle and seat or the pump passing fuel through the impulse line but my money is on the needle and seats.