Hate the swingarm

[edboy]

hi kicka, without going into my garage and measuring everything. i have written down
needle roller o/d 1.25  i.d. 1 inch. bearing b-1616. eu.
inner roller sleeve i.d. 0.804 / 20.54mm  x 1inch
spindle o/d 13/16   0.8125 / 20.637.
i hope thats all correct. check the bearing suppliers dimensions if you can online.

[Truckedup]

Thanks, a large  US mail order supply house has the bearings. I measure the old spindle as .800 The roller tube I might have to fabricate on my lathe..

[edboy]

hello ,  the needle roller inner sleeve fits snug on the cross over spindle . so i would buy those also.
if you have a lathe no problem making a inner spacer .i drilled and tap the swing arm for a grease nipple and you can peg the spacer that way if you like. you should i.d the spacer to give extra support for the cross spindle and possibly spiral for grease path. the needle rollers and swing arm will float on the spindle when bolted together so you wil need a pair of outer spacers for shimming. for my tribsa with modern tyres i remember using 2  x 1 inch needle rollers either side for top handling . with bearing suppliers giving dimensions online the choice is yours. however from experience with u.k. weather ,using a suzie i would strip and regrease every 2 or 3 years. and materials and workmanship is your responsibility. talk and blog is cheap.

[Kickaha]

hi kicka, without going into my garage and measuring everything. i have written down
needle roller o/d 1.25  i.d. 1 inch. bearing b-1616. eu.
inner roller sleeve i.d. 0.804 / 20.54mm  x 1inch
spindle o/d 13/16   0.8125 / 20.637.
i hope thats all correct. check the bearing suppliers dimensions if you can online.

Awesome, thank you very much

[Truckedup]

 I fabricated axles and bushings.......One more question... the swingarm axle tube has what appears a spacer stuck in the middle. The parts book doesn't show a spacer...Is it a spacer or is the center of the tube a reduced diameter? 

[bsa-bill]

the swingarm axle tube has what appears a spacer stuck in the middle.

Mine has too, I assumed it was a stop for the bushes and it did workout that way for me, but from a thread long ago I think was not the case in everyone's S/A, once again differences in the same thing
 

[Swarfcut]

 The silentbloc bushes used in automotive applications are usually symmetrical in that the inner steel tube is only slightly longer than the outer. The BSA version looks like a "special", where the inner tube extends  to the centre line of the swinging arm, and abuts with its opposite number.

 With some sort of central spacer, standard size bushes may have been used. After all BSA would have sourced far cheaper industry standard bushes to cut costs if they could.

 Worth checking if anything in common use will fit.

 Swarfy.

 Additional. Is BSA Bill's a solid, early type spindle, or a later brake cross shaft type with a hollow tube spindle and thin wall bushes?

[morris]

My swingarm (hollow shaft) has a reduced centre. Found that out when trying to press out the bushes...
In the end I burned out the rubber, collapsed the outer tubes inwards and drove them out from the other side
The frame is ‘58 but the whole bike is a mix ‘n match of anything produced between ‘58 and ‘62 so not sure what year the swingarm might be.

[bsa-bill]

Is BSA Bill's a solid, early type spindle, or a later brake cross shaft type with a hollow tube spindle and thin wall bushes?

Mine is the later hollow spindle type

[Truckedup]

  Here's the bushing set up I   made. The frame is a 1961.

[bsa-bill]

In the end I burned out the rubber, collapsed the outer tubes inwards and drove them out from the other side

My method too morris with the exception I drilled out the rubber

[tomkilde]

I'm getting ready to send the frame and swingarm of my A10 to be media blasted and powder coated.  Per the attached photo, one end of the swingarm is open.  I don't think this is a problem functionally, but every photo and drawing I've seen shows both ends closed.  Before I start looking for someone to repair it, I'd like to ask the forum experts to confirm that this wasn't some rare and valuable optional BSA feature that I should preserve.  The frame has a 1954 serial number.

In case you were wondering, yes, the spindle was completely frozen.  I spent two weeks trying to loosen it with penetrating oil, heating and freezing, various hammers and homemade pullers.  Nothing worked, and I ended up cutting off the ends with a hacksaw.  Now I need to work on the bushes...

[berger]

I will stick my neck out and say its been sliced

[tomkilde]

Also, is it safe to assume the two brackets for attaching a chainguard are supposed to be identical?

[tomkilde]

Sorry, meant to say "similar" not "identical".  Looking at photos of a 42-7730 chainguard, the distance between the holes is clearly different when comparing the front and rear mounting points.

My A10 came with an aftermarket chainguard fastened with a complicated set of custom brackets and straps, none of them using the original chainguard mounting points.  I'm just trying to sort out how to put it all back together correctly.