M900 vacuum pump??

[beastie]

I recently bought a modded M900 and followed the gas line from the tank and it goes straight to the carbs.

Do you really need one? Why would they have removed it? If I wanted to reconnect it, which hose those the vaccum line come from? I figure on the carbs somewhere but which one?

Thanks

[Porsche Monkey]

Its on the vertical cylinder intake runner. The bike shouldn't run correctly without the pump. CA-Cycleworks in our sponsors section sells an affordable replacement to the oem.  I swapped mine out completely for a small electric one and have been happy.

[Howie]

the bike will work without the pump, sort of.  Any time the fuel level is in the tank below the fuel inlet on the carbs you will have a problem.

[Norm]

It will run fine without the pump but it helps if you have a fuel shut off to take the pressure off the needle seats when the motor is off.