Yokes

[Lightningpower]

I found a pair of yokes that are supposed to be A10/A7, but they are narrower than other a10 ones I have seen.  The casting number on the underside of the top yoke is: 65-5365.  I'm looking for a set of 1953 plunger yokes.  Will these work?   What are they from? 

[Goldy]

I cannot see a 65-5365 but 65- 5355 is BSA B models. If they are more narrow then this will be what they are for. They are not suitable for an A 10 because they are narrower the front wheel hub and mudguard will not fit.

[bsa- bill]

360272216645 item listed on Ebay as

A pair of original BSA steering yokes.Top yoke part number 65-5365 used but in good condition Top yoke measurement at widest point approx 8 1/4 inches,measurement centre to centre of fork leg holes approx 7 inches.Bottom yoke measurement at widest point approx 8 1/2 inches,measurement centre to centre of fork leg holes approx 7 inches.Suitable for BSA Single and Twin Plunger (Spring) models etc.

Seller could be wrong though, item ended BTW

I'm sure someone here will have a definitive answer

[Lightningpower]

The "3" in the number is a difficult one to read up close, it looks at once like a 3 a 5 and an 8!  So, if you say it's a five, it probably is.  The photo definately makes it appear more like a 5.  A B model hey?  I wondered if it was for a C model.  B model would be good.  There are more of them around here.

[Lightningpower]

What should the casting number be on a plunger A7?  I found a whole slug of yokes but none were anywhere close to the number in the parts book.  I assumed they were A65.

[Goldy]

According to Draganfly parts book for 1953 both A and B models use part No 65-5430.

[Lightningpower]

That's helpful.  Could they be C15 or C11?  If BSA used the same yokes for A and B plungers, then can I use the same wheel as a Goldstar?  Or the same forks?

[Rusty nuts]

Casting no.s & part nos are usually 1 digit different.
 If you search the Draganfly site, 65-5364 takes you here:
 
"65-5364
Top yoke (66-5088U)
THIS PART SUPERSEDES TO 66-5088 PLEASE SEARCH AGAIN USING THIS NUMBER
GBP 0.00"

Which leads to A/B 49-52 & M 49-57.
 Of course they could be wrong!
Nothing close in a 49 A7 parts book!

In general if the centres are correct (ie 7") you can use but you will have to pay attention to steering stop layout (there are at least 3 varieties)  vs the stops on your headstock.
  Also steering damper bottom bracket may have issues.
 There are also issues with shrouds as the length between top & pinch bolt cut outs are not all the same.

Safe to say I have some experience in these departments

Cheers

Rusty

[terryk]

BTW I am chasing fork yokes for 1948 longstroke A7 that are 225mm across the top. The others for BSA A10 etc measure 215mm. Anyone have a set I would be grateful. cheers Terry

[Lightningpower]

Hey there. Goldy,
What are the casting numbers?

The yokes pictured above measure 215mm accross.  Are they then suitable for use on a 53 A7?