Vacuum hose replacement. Help needed.

[Tigertriple]

I am about to buy a carbtune and while I am doing the balance I plan  to tackle changing the vacuum hoses on my 06 Tiger. The last owner had a Scotoiler fitted and removed it before I bought the bike. He didn't bother to take out the splice and I now want to do this.

My question is what size diameter of vacuum hose will I need to buy Or should I buy the hoses from Triumph?

Cheers

[Bixxer Bob]

6mm silicone vacuum hose will do it, it has to be rigid enough to not collapse when small vacuum is applied.  Re the carbtune, I copied the setup I saw in a Triumph dealer by using additional tube and T pieces (avalable from Halfords etc).  Put the carbtune on the T and then put the T between the IACV and the TB with an additional tube stub.  That way the IACV still controls the tickover and you get a smoother end result.  Without the Ts you have to set a few revs on the throttle by jamming it with a rubber band or it won't tick over with the IACV disconnected.