Oil seal sizes.

I wonder if anybody knows, and could tell me what the sizes of;

1. The gearbox oil seal sleeve gear bearing, part No 040132,

2. The primary chaincase oil seal part No. 065956 (MK3) that fits over the gearbox mainshaft?

I hope to be able to purchase them locally so as to save time (I'm not at work tomorrow), as I need the bike back together urgently for a trip.

The reason that I've stripped it though, is because today I was leaving small oil leaks under the primary, and the primary chaincase oil seal that fits over the gearbox mainshaft is a suspect, but I could definately see a small trail of oil coming down from the sleeve gear bearing. I am perplexed as to why this has suddenly started. I've done about 120 miles today in a lot of rain, and the final drive chain, which I adjusted yesterday felt very tight. I was concerned that it may have put such a strain on the gearbox that the casing had cracked, but it all looks OK from the naked eye, but with the sprocket removed, you can clearly see the oil coming out of the seal? :?: :?:

The bike is putting a bit more power out than last year which is quite noticable, but surely not enough to flex the shaft and open the seal up??

Thanks in advance.

I have every seal you ask about and more on hand to measure for you but just not right now. Vendors of course have em signally or blister pack sets. If no one else pipes up I'll measure but seems useless unless altering the bore/shaft dimensions.

What can cause sudden leaks is too tight primary chain/belt when heated to full road temp, to tension so much it wears/cracks up the end sleeve shaft bush.
Over filling gearbox to manual spec will also over flow as you mention. I fill mine to just covering the cogs as seen thru fill hole and no more or leaves a mess exactly as you describe, but of course being a Norton a number of things singly or in combo can cause identical symptom/signs.

There is no sealing provision for the seam of the sleeve gear bush/main shaft seam, just innate -ill-designed in lack of lube getting to that vital hi load area keeps a Cdo mostly dry around there.

Thanks for the offer of measuring the oil seal sizes hobot, but I've managed to sort the prob.

I've got some new ones locally, so now to build it up and see if they sort the leaks?

Reggie, Be sure to put some electric tape on the shaft befor you put the primary cover back on. It will keep you from f^*!ing up the seal. Dont ask me how I know

Phil

Not so easy as Phil relates as oily surface screws with tape adhering and then tend to buddle up on its and seal and even just push ahead of seal leaving edges to nip seal. Tool sold is a blunt cone with a bolt in butt to screw flush up to edges so seal slips right past. You do want the surfaces all oily ya know. My DIY would be a bolt and mold a bondo or JBWeld blob in a mold mostly correct and trim to work.

I've put this seal on/off a handful of times, last on current Trixie Combat just started yesterday and rev'd over isolation for a few minutes on 4 goes, to see puddle of oil in points area, so maybe its don't matter how ya put the dang seal on the cam. ugh.