I am after  bit of advice connecting the ignition breather behind the gearbox filler on a Jumbo, there is just a rubber grommet with a hole in, i can thread an 8mm pipe ( i think it is 8mm od  ) for a short length but does not seem to go in very far, does it need  securing with silicone or can it be blocked up?   i am running an electronic ignition.( Rexspeed)

Or do you have to remove the flywheel to feed it in from inside the casing?

Many Thanks

Geoff

 

The idea behind the ignition breather is when you have a hot engine and you enter water the case can suck in some air instead of water as it cools down very fast. So keep the breather if you can.

In my experience (240 & 280 Rotax) there is always condensation in the ignition case. Well worth keeping the breather and routing it up under the tank, but with a low point to stop any condensate flowing back.

It still is like before, every bike I have owned and raced over the past decades always have some condensation in the ignition case after a couple of runs. Even a boring ATV has the same kind of interesting, internal water production, like the jap one I use to collect firewood. Of course, there is still a breather attached on such a tool, even today.

Thank for these replies, on the 240.320 Rotax engines there is a short stub to connect the breather pipe so an easy fit, on the jumbo just a grommet with a hole unless i am missing a part, do i just  thread a pipe in and seal it best can looking at pics of other jumbos they seem to route it behind the engine/ swing arm pivot alongside the gearbox breather pipe with a zip tie

 

Many Thanks

Geoff