Gearbox for a Norton 850 Mark2a

[Paul in NZ]

Yea I have thanks, I havent found his add yet but Im still looking, I have a couple of friends who have the old classic bikes and they are scanning their eyes over them too.

Thanks for the advise tho, its a life saver

Stu

Stu

Drop me an email tonight. I'm sure there was a write up about improving commandos a while back and I have it some place. It will be in there!

Link to owners club links page

http://www.ncno.org/links.html

http://www.domiracer.com/

http://www.fairsparesamerica.com/

http://www.norvilmotorcycle.co.uk/

Email them. This is not the first commando to shit it's gearbox! Norvil even do a rebuild kit!

[Sniper]

Hey paul, thanks you are a legend

Hey, one of my mates found a gearbox fopr it in CHCH, not too sure on if its the right type ect but I got it for next to nothing ($250)

So here comes the good part, putting it in.

Wish me luck

Sniper

[Paul in NZ]

Hold up there....

They are a good gear box but while it's out, do the poor old thing a favour and give it a fresh set of bearings and gaskets. A few hours work!

It will give you a chance to pull down the old box for a look see as well so you can check it's the same. I think there is a special tool required for the clutch on those things (single spring diapraghm)

They all look visibly similar and I'm a bit hazy on it but I think there are differences between Dominator one and Commando ones. Certainly the gear ratios will be different so resist mix and matching parts until you are sure.

Check the Norvil page and email them and ask if they can help identify it (the box) as being suitable. I'd certainly recommend their advice and their rebuild kit!

You got the box for stuff all and the bikes are worth a $$ or 2 so it pays to get it right!

Cheers

[Motu]

Also check and maybe replace that little shift lever return spring,not much money and it's kinda silly when the lever flops down and won't shift,you might burn out the clutch if it happens in top.

[Sniper]

Yea, that makes perfect sence. I wasnt too keen on just popping in back in the bike, I always like taking things apart.

I also might give Norvil a ring Dave, I mean, its worth spending a bit of $$ to get this right so I dont have to watch the old girl struggle with a bung artifical leg (Gearbox) again. I recon its worth it.

Motu, I might also check that out if Norvil doesnt send that part in the rebuild kit.

Thanks guys

[Paul in NZ]

I did some digging...

It's usually the layshaft pinion that strips it's teeth due to the mainshaft flexing under load. (the commando make lots of torque) There is a layshaft roller bearing conversion kit available that strengthens it up. Recommended!

Check you have not got an old dommie box as it won't last unless it is strengthened.

Paul N