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by malcolm.johnson
Fri Dec 20, 2019 3:50 pm
Forum: Four stroke
Topic: Gearbox and clutch questions
Replies: 8
Views: 574

Re: Gearbox and clutch questions

Our treasurer has kindly fixed me up with a set of correct springs and cups. Just for reference, my shorter cups are correct but the long springs although similar to look at are a much heavier version, being 1.75 inch long with 8 coils of 2.0mm dia. wire, whereas the correct spring is 1.625 inch lon...
by malcolm.johnson
Tue Dec 17, 2019 5:19 pm
Forum: Four stroke
Topic: Gearbox and clutch questions
Replies: 8
Views: 574

Re: Gearbox and clutch questions

Thanks Paul, that is what I need to know. So the shorter shaft is from a single. You seem to infer then, that the springs like the longer cup I have are also from an inferior make, as when installed in the shorter cups, they poke out a long way! As for the main shaft, I am fairly confident it suits ...
by malcolm.johnson
Sun Dec 15, 2019 4:18 pm
Forum: Four stroke
Topic: Gearbox and clutch questions
Replies: 8
Views: 574

Gearbox and clutch questions

I am piecing together a BA gearbox and clutch to fit a 47 Sq4, from boxes containing the dismantled giblets of a couple + Burman gearboxes and clutches. Am I correct in thinking, that the lower of the two mainshafts pictured is the one to use and what might the shorter shaft fit? Amongst the clutch ...
by malcolm.johnson
Thu Dec 12, 2019 4:42 pm
Forum: Four stroke
Topic: Draganfly 40t clutch sprocket
Replies: 3
Views: 279

Re: Draganfly 40t clutch sprocket

Pm on the way Dave.
by malcolm.johnson
Thu Dec 12, 2019 1:01 pm
Forum: Four stroke
Topic: Draganfly 40t clutch sprocket
Replies: 3
Views: 279

Draganfly 40t clutch sprocket

Looking at the Draganfly parts lists, I see they do a 40t as well as the normal 44t clutch sprocket for twins and fours. I am missing the 44t sprocket for my NH engined project and I am wondering whether to buy a 40t sprocket for my 47 Sq4, which I do find a bit "buzzy", being a four and f...
by malcolm.johnson
Sat Nov 16, 2019 2:25 pm
Forum: Main Chat Forum
Topic: New club Facebook page
Replies: 58
Views: 2321

Re: New club Facebook page

Having been a BSA enthusiast until I bought my first Ariel (a dismantled 4G) nearly 10 years ago. I knew nothing about Ariels and largely that is still a fair description, so I joined the AOMCC. It was a great move as the club and forum were an essential source of help in the completion of that proj...
by malcolm.johnson
Sun Nov 03, 2019 12:42 pm
Forum: Four stroke
Topic: 1938 ariel square four tank mounting rubbers
Replies: 2
Views: 942

Re: 1938 ariel square four tank mounting rubbers

I remember trying to resolve this a few years ago. I simply worked on the old assumption that if it looks right, then it is right. I sat the tank on the rubbers in their two positions without bolts, stood back and looked at the bike and choose the best position. On my 1947 4G the 5/8 rubbers ended u...
by malcolm.johnson
Tue Oct 22, 2019 9:34 pm
Forum: Four stroke
Topic: Front fork oil leak.
Replies: 10
Views: 3842

Re: Front fork oil leak.

I have also found what Paul Appleton describes. I always fit seals now with a suitable application of pipe sealer or silicone sealant.
by malcolm.johnson
Sun Sep 29, 2019 9:01 pm
Forum: Four stroke
Topic: Nh 350
Replies: 15
Views: 3641

Re: Nh 350

To disconnect the capacitor on some models does require the armature to be dismantled. This is easy enough if you have the proper pullers to remove bearing inners etc. Pictures of my Square 4 "codesectomy". 20. Sq4 Full condensectomy (2).JPG 20. Sq4 Full condensectomy (3).JPG 20. Sq4 Full ...
by malcolm.johnson
Sun Sep 29, 2019 8:45 pm
Forum: Main Chat Forum
Topic: degreaser
Replies: 17
Views: 7776

Re: degreaser

When I was an apprentice mechanic in the 1960`s we had a big paraffin bath that all the workshop lads shared and each mechanic also had his own tin of "trike" (trichloroethlene ?) Brilliant for cleaning anything especially carburettor exteriors, the smell still lingers with me, but I belie...

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