Airbox drain pipe!

You deserve a break! :lol:

Could it be that the air box drain is open ? That might account for the oil on the underside of the bike ? And would also explain why so little in the air box after 2500 miles .

My airbox drain is open as well. As long as I don’t overfill the oil, I only have a tiny dribble of emission from the airbox vent hose. It lands on the X-Pipe usually, and cooks. None of it gets to the rear wheel or rear disk as some had worried might happen. So, for me, it’s a bit sloppy, but a non-issue.
A catch bottle for the vent tube (like the one offered by SBN) would eliminate the slop altogether. This is something I might pursue. Richard-7 indicated that he was working on a potential solution that he would make available to forum members.

Eventually, forum members will develop solutions to all of the niggling problems, and then Norton can implement them on future models.
Yeah, that's how R&D should work. :lol:

I didn't mean to make this thread last forever , but I have finally found what may be a suitable oil breather pre-catch and drain back tank . The idea behind this is to make the air and oil go uphill , the air continues and leaves behind most of the oil. What oil reaches the oil pre-catch tank will be allowed to drain back to the engine because it will be mounted up above the engine. That is the principle. There will be an exit from the pre-catch up higher that will go to the air box where the engine breather used to attach. Now , the hard part is finding the spot to mount it . During testing mine will be mounted by the headlamp dog ear or somewhere up there and zip tied on. Once the results are in , I will post the part number of the tank and the material I used . Also I will include some drawing in case you can't picture what I am saying . Another solution but more costly is to utilize the original Norton Commando oil tank breather principle. That is to use the oil tank as the oil pre-catch tank and exit to the breather box from there. If Norton redesigns the frame they may do just this. The idea would be to stop taking the breather output from the L/H side of the rocker and fashion a breather output up high on the oil filler tank neck. This would reroute the breather crankcase to rocker to oil tank (through the already existing line and tank pipe) and finally out through the oil tank filler neck outlet to the airbox. This is where the kit would have to come in , and in the case of a real fabricator a pipe could be drill and weld to the frame at the filler neck. This kit would necessitate the use of a longer dip stick because the threaded adapter would need to go in first and this would have the air box breather outlet attached to it. That is all I have for now.