fuel Problem

[scottf15]

New here, thanks for adding me. Would anyone know why I have to suck on the fuel vacuum line to fill the carb after my 1985 scooter sits for more than maybe a week or so. After I do that the engine starts right up. Your help is greatly appreciated, this has been a on going problem ever since I bought it about five years ago.

[bonesv]

New here, thanks for adding me. Would anyone know why I have to suck on the fuel vacuum line to fill the carb after my 1985 scooter sits for more than maybe a week or so. After I do that the engine starts right up. Your help is greatly appreciated, this has been a on going problem ever since I bought it about five years ago.

The fuel is evaporating. You could slow down this process quite a bit by temporarily capping off the vent to the float bowl while it's sitting but you would need to remove the cap before riding it again.

[Wheelman-111]

Greetings:

Bones is absolutely correct, and I have the same problem with my stock-carbed Elite SR. I seem to recall a picture or a diagram of the lines plumbed into the carb/airbox assembly that presumably mitigate this evaporation effect. It's somewhere in the Factory Manual. Could someone please post it up if you find it?

[scottf15]

Thank you so much for the info, It has really been driving me nuts

[bonesv]

It’s a little nipple above the bowl area. It may have a hose on it already. If not, you can use a 6”-8” piece of fuel line to tone down the evaporation instead of blocking it off. Route it around the back of carburetor into the wheel area.