Fatal Attraction ?

The vent needs a line that should be routed to either the air box, or the catch bottle.
Just an open vent would be sloppy with oil vapor spewing out.

coloradonortonworks.net

Transmission Vent Kit 961

High quality components Made specifically for the 961 engine Easy installation Years 2010 – current Replaces existing transmission filler cap Plugs directly into a spare hole in your airbox Made in Canada Easy to install by following the manual “Transmission Vent – Norton 961” BONUS: Air box...
coloradonortonworks.net coloradonortonworks.net
 
I do intend to keep a careful eye on it, but I don’t understand why oil mist would come out? The classic Commando just had a tiny hole in the gearbox inspection cover and no oil spews out of that. And it fact many doubt it’s even required.
 
cliffa said:
I do intend to keep a careful eye on it, but I don’t understand why oil mist would come out? The classic Commando just had a tiny hole in the gearbox inspection cover and no oil spews out of that. And it fact many doubt it’s even required.
Click to expand...
I fitted a lovely brass breather similar to yours and the oil mist came out!
Remember that there is a lot of heavy metal thrashing about in there.
It is just mist and will not pour out so no need for catch tanks etc.
 
cliffa said:
I do intend to keep a careful eye on it, but I don’t understand why oil mist would come out? The classic Commando just had a tiny hole in the gearbox inspection cover and no oil spews out of that. And it fact many doubt it’s even required.
Click to expand...
Well, I would at least put a screen of some kind on it to prevent mischievous individuals from dropping things down the spout.
 
BritTwit said:
Well, I would at least put a screen of some kind on it to prevent mischievous individuals from dropping things down the spout.
Click to expand...
I did think about that plus rain and washing the bike, so the vent hole is about 1/2" above the gap you can see between the filler and the bottom of the alloy cover (which is the outlet). Like I said I will keep a careful eye on it, especially as MAK has already tried something similar. One of the reasons I preferred not to fit a pipe was the thought of condensation build up in it which will dribble back into the gearbox, but I see the official Norton breather goes downwards to atmosphere which is what I'll do if the need arises.

To be clear this is all new territory for me, so I really appreciate the comments / advice.

Cheers,

cliffa.
 
cliffa said:
I do intend to keep a careful eye on it, but I don’t understand why oil mist would come out? The classic Commando just had a tiny hole in the gearbox inspection cover and no oil spews out of that. And it fact many doubt it’s even required.
Click to expand...
Rotating gears transmitting torque also produce friction. Friction force x gear tooth velocity equals power. So, part of your engine power is lost as oil and casings heat up and transmits the heat to the surrounding air. If the oil gets really hot (above 120 degrees I guess), some oil will evaporate and rises upwards with heated air. Heating of air causes a pressure increase inside the gearbox. In order to prevent air and oil mist being pressed out along shafts etc. causing contamination of just undesireble drips, differential pressure is allowed to expand into free air. As the gearbox cools down, air is sucked into the gearebox again, which is why the vent should be free breathing. By allowing a generous breather dimension, elevated oil mist will condense and flow back into the gearbox sump.
(The vent provided at late model AMC gearboxes is far from optimum and also allows ingress of water.)

I hope this helps.

-Knut
 
BritTwit said:
The vent needs a line that should be routed to either the air box, or the catch bottle.
Just an open vent would be sloppy with oil vapor spewing out.

coloradonortonworks.net

Transmission Vent Kit 961

High quality components Made specifically for the 961 engine Easy installation Years 2010 – current Replaces existing transmission filler cap Plugs directly into a spare hole in your airbox Made in Canada Easy to install by following the manual “Transmission Vent – Norton 961” BONUS: Air box...
coloradonortonworks.net coloradonortonworks.net
Click to expand...
Well whoever screwed the brass fitting into the the air box on my bike used a lot of loctite. A lot. No amount of wrenching would shift the blighter. I ended up rounding off the hex hole. Next time the tank is off I'm going to attempt an easy out in whats left of the screw.
 
Ssimonc said:
Well whoever screwed the brass fitting into the the air box on my bike used a lot of loctite. A lot. No amount of wrenching would shift the blighter. I ended up rounding off the hex hole. Next time the tank is off I'm going to attempt an easy out in whats left of the screw.
Click to expand...

Ssimonc, it seems Norton started to glue in that plug with whatever intention, so the later kits from Richard-07 include both adapters I believe. Excerpt from the install instructions...

Fatal Attraction ?




Hope this helps,

cliffa.
 
cliffa said:
Ssimonc, it seems Norton started to glue in that plug with whatever intention, so the later kits from Richard-07 include both adapters I believe. Excerpt from the install instructions...

View attachment 20799



Hope this helps,

cliffa.
Click to expand...
Thanks Cliffa. Either way the brass plug still has to come out to screw in the new fitting. I did buy the kit from Richard and I recognize the brass spout. Is that one photo or two superimposed?
 
Ssimonc said:
Thanks Cliffa. Either way the brass plug still has to come out to screw in the new fitting. I did buy the kit from Richard and I recognize the brass spout. Is that one photo or two superimposed?
Click to expand...
Hi Ssimonc, I snipped that picture from Richards instructions so have no idea if it's one or two pictures merged. I can send you the sheet if you don't have it. Why not just follow the official Norton breather route which exits down under the bike.
 
cliffa said:
Hi Ssimonc, I snipped that picture from Richards instructions so have no idea if it's one or two pictures merged. I can send you the sheet if you don't have it. Why not just follow the official Norton breather route which exits down under the bike.
Click to expand...
I'm guessing I have the old instal sheet from Richard, because that picture is not on it. I tried to download the new one from CNW but it's misbehaving. It might have a little more info on it. If you have to new one, great, send it on.
 
Hi folks,

I emailed Marie Smart @ Norton about getting the later style gearchange assembly, but was informed the spares and service depts. are closed due to Covid. I'm pretty confident I can modify the existing gear lever and make the linkage, but obviously that will reverse the pattern. So my question is, has anybody done this change themselves, and if so is it just a simple change like reversing the pawl or do I need loads of bits? As mentioned I will be checking the clutch and balancer anyway, but I don't want to steam in there only to find I need to order parts. ( I'm presuming that the shift pattern was kept to 1 down 4 up of course).
 
Yes , 1 down and 4 up . The shifting hook would have to be on the other side of the shift drum star . This would keep the correct rotation of the shifting drum. Can you send pictures of your internals so we can have a look ? ls your bike older 2010 ? I looked and see 2011. . Contact Norton for sure and ask them , also send photos of internals maybe we can piece it together .
 
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TonyA said:
Yes , 1 down and 4 up . The shifting hook would have to be on the other side of the shift drum star . This would keep the correct rotation of the shifting drum. Can you send pictures of your internals so we can have a look ? ls your bike older 2010 ? I looked and see 2011. . Contact Norton for sure and ask them , also send photos of internals maybe we can piece it together .
Click to expand...
Hi Tony, thanks for the reply, yep 2011. Norton haven't replied so I guess they are closed for a while. I wondered if swapping the side of the shifter hook would do it. I hope Ken doesn't mind but this was a picture he posted of his primary innards a while ago, so I'm guessing it will be a different hook in mine. Great if that's all it is !!

If I pull the primary do you think I'll be able to re use the gasket ? it certainly looked as if Ken was able to get it off clean.


EDIT: I just found a Youtube video of a Buell shifter mech adjustment. It doesn't look too dissimilar does it? ...
 

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Yes you can re-use it , Norton weren't using sealant , be careful . You live in Germany , close to Germany - Ollie has gaskets !
 

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