Unraveling the 961 part two (oil in the air box)

Stephen_Spencer said:
I love your style Adrian! You made me chuckle though, is the idea not to engineer less oil rather that more can!:)

On a side note, I saw Maiden several times in their prime - awesome!

Long live Norton
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Ya gotta just make stuff work dont ya? More can less oil...if its really puking ya gonna need a bigger can? haha! Conner beat seein the Trooper live! good times
 
More rides still no excess oil in the catch bottle....... darn't declare success........ but I think things are "working" correctly now.

All seems to have subsided since the day out with big hill climbs to load the engine and large decent's to engine brake so as Max was indicating the rings may have been the issue and are now seated better.

Fingers crossed.... :D
 
Hi Bluey
I’m with you.
Bike was haemorrhaging oil like yours.
I was running a second catch bottle from the oil filler neck, to improve breathing. It worked a treat. To check the oil level I had to replace hose attachment with the dip stick. About 500km ago forgot to re install the breather pipe. And presto no oil in small catch bottle. Bike has just clicked over 13000km. Thats about 8,000 miles for the heathens. Running like a dream. Happy days.
 
Bluey72e said:
We all know now why though, SG & Co were more than likely overdue paying the supplier's bill hence the supply issues.

Now I have mad gasket making skillz I can take orders, I am thinking of making 1 a week to keep with more recent Norton traditions and I may or may not supply the goods but your all used to that so no biggy :p
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Are you making gaskets…?
 
iwilson said:
I've changed the design already, using a very simple back flow preventer instead. Very small amount of pressure from the crankcase will seal it. With the engine off, gravity and the weight of the oil above it resets the valve to the open position (well that's the plan)!

The idea is that oil from the separator will end up back in the crankcase rather than the airbox. Currently the Norton separator allows to much oil to get through it and into the airbox, this is because it's a very simple design as it must allow the oil collected to flow back into the crankcase when the engine is switched off. I'm trying to come up with a very efficient separator that will also allow the collected oil to return to the crankcase without user intervention. This will mean less oil being burnt in the engine and no need for the catch bottle.
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Old thread, but Ive only just started having a read, due to a recent thread linking to it.
I think the catch bottle was a euro compliance ie not allowed to dump stuff on the road now. The AOS was never up to the job. Yamaha designed that for the R6, which had great tolerances....compared to the hit or miss tolerances that Norton worked to.
I was never a fan of it myself either, far too ugly. I remember when it was added to the 961...the designer came into production one morning, with the aos off his R6, held it against a Dominator on production and said "yeah, that'll do". Looks terrible.
I'll read the rest of the thread later when I get five, as I know your stuff always goes into great detail with thought applied.
 
Bluey72e said:
More rides still no excess oil in the catch bottle....... darn't declare success........ but I think things are "working" correctly now. All seems to have subsided since the day out with big hill climbs to load the engine and large decent's to engine brake so as Max was indicating the rings may have been the issue and are now seated better. Fingers crossed.... :D
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