I need to add a catch tank and need to connect from the vent on my Duratec block as well as a take-off from the rocker cover.
What tubing should I use? Silicon hose seems a bit extravagant for the relatively long runs required.

8mm bore, black silicon,£3.48 per metre, free postage used them for all my hoses. AutoSiliconeHoses Vacuum Hose Pipe Silicone - Select Your Colour &' Length - Air

Prefect - Thanks!

Make sure you remove the ball bearing and spring from the Crank case breather too

I'd seen something on that but then read something after that seemed to contradict it.

The valve will not open due to not having a vacuum sucking on it, so the crank may over pressure.

Hi big vee twin,

Could you explain how to remove said valve from breather cover and how to remove the ball and spring from inside,

Cheers,

[Edited on 6/1/14 by Thatcher]

Hi Chris
Back to the original question i used silicone on the J15 but only because it looks nice and matched the other silicone runs ! on my Tiger i had clear pvc cheap as chips and you can see that its working and far more pliable to link up etc. Youll probably end up with more condensation in the tank than oil.

Nick M

Your making progress then ?