classic motorcycle forum

I’ve got a reply from Michelin.

Thanks for choosing Michelin inner tubes for your bike.
 
The inner tube is installed  with the conical washer sitting between the inner tube and wheel rim.  On a road bike the first lock nut should then be run down to lightly touch the rim, and then backed off by half a turn.   The second lock nut is run down until it meets the first one, then the two nuts should be locked together by using spanners to rotate them in opposite directions.
 
I hope that this helps,
 
Best regards,
 
Tony Charlton
2w Customer Engineering Support – Operational Marketing

So there you go my intuition came up trumps for once. I fully expected to have to take the tyre off and start again.

I’ve just got round to fitting the tyres and tubes to my Bonnie wheels.

The tubes (Michelin) come with two nuts and a dished washer on the valve stem. To me it seemed obvious that the washer is fitted on the valve stem between the tube and the rim, with the nuts fitted on the outside of the rim to stop the stem pushing back into the rim.

The tube I took off which was fitted way back when I walked briskly and could run up stairs had one lock nut tightened down onto the the washer on the inside of the rim. This was probably fitted professionally.

Having got the front wheel sorted I wondered why two nuts were supplied. So I did an inter web search. The inter web being what it is offered more permutations than Vernons.

The conclusion I have come to is that I have fitted the tube as the manufacturers intended, with only the washer (fitted dished side towards the tube) on the inside. And the two nuts on the outside not tightened down to the rim but locked together mid way up the valve stem, which will allow the stem and tube to flex on the rim without damage, and also to indicate any tyre or tube creep by an angled stem.

So if you still there and haven’t nodded off after all that waffle what’s anyone else’s opinion.

Here's another photo. It does look like it's hand change. I doubt they would have been able to afford a Norton, assuming they would be more expensive than a BSA. Incidentally they were obviously in the Lake District they had travelled from Hull. I'm not sure I'd fancy doing that on a modern 'small' bike with all the refinements we have now.

It was my mum that always said it was a BSA, but she's not around to ask anymore. I did have my doubts but never broadened my search from BSA. I have another photo at home (we're away with family for the weekend) it's taken from the front and may give a bit more information.

A good home made release fluid is 50% ATF and 50% acetone or paint thinners. Gentle heat i.e. Immersing in Boiling water, and then freezing the part and repeating this process can work as well and shouldn't harm any plastic parts. All you need to do is to get the two parts to expand and contract at different rates to brake the bond between them. Gentle and persistent is better than in a hurry with a hammer.

I've got a Dunlop ally WM3 rim fitted which measures 2.17 wide at the bottom of the flanges and only just gets insideAvons tolerances. Tyre width should be ok, in the past I had to deflate it to get the wheel out.

Avon Roadriders?

http://www.avon-tyres.co.uk/motorcycle/roadrider

I notice your '?' Is that what you've got fitted. I've google them looking for feedback but not found much.

In the next month or so I'll be getting round to fitting tyres to my T120V Bonnie. Can anyone advise, recommend or just say what tyres they have fitted or have experience of. The last tyres I bought were Battleaxes for my Suzuki Bandit a few years ago but doubt they would be suitable!

I'd sooner go for function over form but don't particularly want something that looks ultra modern. The bike won't do many miles so wear rate isn't a problem. It will mainly get used in dry weather but I'd like it to be controllable on wet roads. I believe I left my loonatic days behind when my hair went grey but I'd still like the tyres to be fairly sticky just in case.

Tyre sizes are,front 100X90-19. Rear 110X90-18. Both are on spoked rims so will need to be tubed type.

Thanks in advance for your replies.