Looking good 
Norton Commando 850mk3....coming back to life...
- Thread starter Johno23
- Start date
They certainly are.
My two sons came over today to put the engine in,obviously whilst staying at a safe distance............
All went well with no damage to the frame,it was actually fairly straightforward.
Did you make sure the rose nuts fit before fitting the engine?
Did you make sure the rose nuts fit before fitting the engine?
Why wouldn’t they?............
The main reason is that they’re not all the same. Nothing major but I bought 4 of which one fitted as it should, one was a bit tight and two simply didn’t fit.
Even the rose part varies according to who made them. If you bought RGM ones I’ve got a decent RGM supplied tool for tightening them and it can go in the post if you ever want to borrow it.,
Thanks Andy, to be honest I haven’t looked at them since I took the pipes off 10 years ago
although there never seemed a problem with them.The ones I have are bronze I think with a big fuck off tool to tighten them,so hopefully will be ok............................I better check
Hopefully you won’t have the same issue as I did which was the nuts didn’t bottom out on the seals so I leant on the spanner a bit harder than I should have done and the inserts which had previously been welded into the head popped the weld and I had to send the head away to have it done properly. The company who did the second repair supplied new rose nuts and all was well in the World.
If they don’t bottom out you’ll get no compression on the seals meaning the nuts are constantly vibrating loose which you really don’t want. Put a bit of solder in the bottom and make sure it gets flattened when you tighten the nuts for a trial fit and you’ll know you’ve got it right
If they don’t bottom out you’ll get no compression on the seals meaning the nuts are constantly vibrating loose which you really don’t want. Put a bit of solder in the bottom and make sure it gets flattened when you tighten the nuts for a trial fit and you’ll know you’ve got it right
Hopefully you won’t have the same issue as I did which was the nuts didn’t bottom out on the seals so I leant on the spanner a bit harder than I should have done and the inserts which had previously been welded into the head popped the weld and I had to send the head away to have it done properly. The company who did the second repair supplied new rose nuts and all was well in the World.
If they don’t bottom out you’ll get no compression on the seals meaning the nuts are constantly vibrating loose which you really don’t want. Put a bit of solder in the bottom and make sure it gets flattened when you tighten the nuts for a trial fit and you’ll know you’ve got it right
Thanks for the info Andy, I am looking into it......
Forgive my ignorance of Commando stuff, but is that spring part of the engine mounting system? Some sort of vibration control device? It does look a bit Heath-Robinson.
I fitted a head steady with a rubber bush built into it pushbike seat springs 
I’ve also got braided hoses feeding the oil to the cylinder head rather than something out of a school chemistry lab.
I’ve also got braided hoses feeding the oil to the cylinder head rather than something out of a school chemistry lab.
Yes it does look a little Heath Robinson but it does work.It is rubber mounted too.
I fitted a head steady with a rubber bush built into it pushbike seat springs
I’ve also got braided hoses feeding the oil to the cylinder head rather than something out of a school chemistry lab.
Yes you have a different one to me. I kept mine std as I didn’t know any better.....
I also have braided hoses for the cylinder head feed, but I forgot to send them down to him when he did the engine
I’ll change them myself before I start her up.
Yes you have a different one to me. I kept mine std as I didn’t know any better.....
I also have braided hoses for the cylinder head feed, but I forgot to send them down to him when he did the engine
It’s a good job you can cope with a bit of piss taking, I have to deal with it all the time
The head steady is a bit of a nothing matter because if it works it’s good enough but the braided hoses, I’d fit them because it’s a major disaster if a normal one decides to let you down. It’s like brake hoses, standard rubber ones are plenty good enough but braided ones make you think they’re better therefore they are better
Gearbox also gone in today, I still have to torque the main shaft nut,the whole bike nearly fell off the stand when I tried to. Best get some help to do that. Even managed a drink before I finished.......... 
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Looking good
What the bottle of red or the bike?
Brilliant thread I was late to this , but Im in, also good Andy did a similar job recently so can chip in some humour and advice.
I’ve also just found this thread....always impressed by folk that can do stuff like this...
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