Carbs...

[rlc2502]

Can anyone please describe where each hose goes and what's it's purpose, the bike has hoses all over the shot :-s  sorry for the dumb question



I think the small horrid colour hose is fuel line from the tank and the other one is to the fuel pipe in the carbs? Is the thin black one that goes from rear to front to do with the vacuum? I'm unsure of the black one at the bottom? And what's the one next to the clear lines?? I'm baffled my manual doesn't seem to offer any information!!


Thankyou

[LukeM]

This looks like the fuel manifold vacuum valve, also known as the Spawn Of Satan.

It operates off of vacuum from the engine, and opens when the engine is running.  When the engine stops, it shuts off fuel to the carbs.  For my bike, it was only a problem if the carb bowls ran dry from lack of riding.  It needed a LOT more cranking to hold the valve open to get fuel into the carbs.  The next day, it started quickly/normally.  I left mine on.

There should be one hose going from the petcock to one side of the SOS, one hose from the other side of the SOS to the input of the carb bank, and a smaller hose going from the engine vacuum source to the vacuum port of the SOS.

I think there's a diagram of this on bikebandit.com or its equivalent.  It may also be in the FSM for DOHC bikes.

You don't really need it, if you're judicious about using your petcock to control gas flow when you're done riding. To bypass it, you cap off the vacuum port on the engine, move the hose coming from the petcock to the input pipe for the carb bank, and you're all set.

You could also do a search on the home page for fuel valve or SOS.
Good luck, and I hope this helps.

Luke M

[rlc2502]

Hi Luke thanks for your reply so the small hose where the fuel lines are should go onto the engine, I'll upload a pic they is a hose connected to the engine and I did wonder what it's purpose was... You'll be able to see the hose. I'm guessing this is the correct one??