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Author Topic: Sleeve gear bushes replacement  (Read 12124 times)

Online KiwiGF

  • Last had an A10 in 1976, in 2011 it was time for my 2nd one. It was the project from HELL (but I learned a lot....)
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Re: Sleeve gear bushes replacement
« Reply #15 on: 03.02. 2012 21:06 »
Most likely BSA chose 0.812/813 as 13/16 is midway at 0.8125 so they could use a std 13/16 non adjustable reamer to get the reqd bush dia and machine all the shafts slightly under 13/16 to get the necessary clearance

The shaft you have is probably worn so you might want to make the bush slightly under 13/16
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1956 A10 Golden Flash  (1st finished project)
1949 B31 rigid “400cc”  (2nd finished project)
1968 B44 Victor Special (3rd finished project)
2001 GL1800 Goldwing, well, the wife likes it
2009 KTM 990 Adventure, cos it’s 100% nuts

Offline BSA500

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Re: Sleeve gear bushes replacement
« Reply #16 on: 04.02. 2012 09:09 »
The reamer I have chosen go's from 0.78 to .84 so should have that covered  *smiley4*
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1960 A7 (57 motor to SS spec)

Offline BSA500

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Re: Sleeve gear bushes replacement
« Reply #17 on: 18.02. 2012 17:53 »
Well the fun never ends does it. Just installed the bushes and found out the short bush of the pair is,well,short by 10 mm. Of course this means there is a gap. My question is would that really be a problem as I have it planned to do the gearbox next weekend and cannot afford to order replacemnet bushes in time reasons.
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1960 A7 (57 motor to SS spec)

Online KiwiGF

  • Last had an A10 in 1976, in 2011 it was time for my 2nd one. It was the project from HELL (but I learned a lot....)
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Re: Sleeve gear bushes replacement
« Reply #18 on: 19.02. 2012 06:58 »
If you look at my earlier pics the bushes are the same length and I would not use them if they have been supplied wrong

What does the supplier say about the bushes they have supplied?

Draganfly supplied mine ex stock
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New Zealand

1956 A10 Golden Flash  (1st finished project)
1949 B31 rigid “400cc”  (2nd finished project)
1968 B44 Victor Special (3rd finished project)
2001 GL1800 Goldwing, well, the wife likes it
2009 KTM 990 Adventure, cos it’s 100% nuts

Offline BSA500

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Re: Sleeve gear bushes replacement
« Reply #19 on: 19.02. 2012 10:59 »
These were from Draganfly and every order for parts from them recently have been wrong. The rocker feed that took 2 months then was for a b25 to ordering 4 sprocket nuts and paying for them and getting only one. As for the bushes my next door neighbour an ex engineer said it should be ok if the shaft is supported each end. As I said before next weekend is one of the few times I can have the car for work while I repair the box so it has to happen. Draganfly are not open weekends so I would have to wait until Monday to contact them. On the website it states you should have a short and long bush so I assumed that was right it seems not. It would take to long to get new bushes and meet my deadline. Ho hum
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1960 A7 (57 motor to SS spec)

Online bsa-bill

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Re: Sleeve gear bushes replacement
« Reply #20 on: 19.02. 2012 13:34 »
I'm pretty sure mine had one long one short
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All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline BSA500

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Re: Sleeve gear bushes replacement
« Reply #21 on: 19.02. 2012 19:23 »
bsa-bill,
was there a gap between the bushes when installed. Really wahat I am asking is there an issue with this gap. I myself cannot see a real problem with this?
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1960 A7 (57 motor to SS spec)

Online bsa-bill

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Re: Sleeve gear bushes replacement
« Reply #22 on: 19.02. 2012 20:37 »
I would think a gap would be good, a little oil would always be in there
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All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline BSA500

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Re: Sleeve gear bushes replacement
« Reply #23 on: 19.02. 2012 20:40 »
Yep I like that idea as well. *smiley4*
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1960 A7 (57 motor to SS spec)

Offline trevinoz

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Re: Sleeve gear bushes replacement
« Reply #24 on: 20.02. 2012 03:15 »
As Bill said, that's the way they were.

  Trev.
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Online KiwiGF

  • Last had an A10 in 1976, in 2011 it was time for my 2nd one. It was the project from HELL (but I learned a lot....)
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Re: Sleeve gear bushes replacement
« Reply #25 on: 20.02. 2012 08:18 »
I know you are going ahead with a gap but out of interest what part numbers did you order?

The part no for my 56 s/a GF is 2 off 67-3073, same part no for both bushes but one is drilled according to the BSA parts book, but both bushes were supplied undrilled.
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New Zealand

1956 A10 Golden Flash  (1st finished project)
1949 B31 rigid “400cc”  (2nd finished project)
1968 B44 Victor Special (3rd finished project)
2001 GL1800 Goldwing, well, the wife likes it
2009 KTM 990 Adventure, cos it’s 100% nuts

Offline BSA500

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Re: Sleeve gear bushes replacement
« Reply #26 on: 20.02. 2012 08:48 »
Looking on Draganfly website and using the list of parts the numbers were 67-3073 and 67-3080.
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1960 A7 (57 motor to SS spec)

Online KiwiGF

  • Last had an A10 in 1976, in 2011 it was time for my 2nd one. It was the project from HELL (but I learned a lot....)
  • Wise & Enlightened
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  • Join Date: Feb 2011
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  • Karma: 17
Re: Sleeve gear bushes replacement
« Reply #27 on: 20.02. 2012 09:18 »
Well I reckon 67-3080 short bush is correct, either the 54-57 BSA parts book is wrong or bsa shortened the bush on later models.

I'm now thinking I should have ordered using the Draganfly parts diagram myself!
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New Zealand

1956 A10 Golden Flash  (1st finished project)
1949 B31 rigid “400cc”  (2nd finished project)
1968 B44 Victor Special (3rd finished project)
2001 GL1800 Goldwing, well, the wife likes it
2009 KTM 990 Adventure, cos it’s 100% nuts

Offline BSA500

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Re: Sleeve gear bushes replacement
« Reply #28 on: 20.02. 2012 10:05 »
Maybe but I doubt it really makes much difference as long as the clearance is correct. Why didn't BSA just make it one long bush?
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1960 A7 (57 motor to SS spec)

Offline BSA500

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Re: Sleeve gear bushes replacement
« Reply #29 on: 23.02. 2012 22:54 »
Had an email from Draganfly which helps explain the different bush lenghts.....

Hi Andrew, from 1960 the A group gearbox was indeed fitted with two of the
67-3073 long bushes. Up to then, the bushes you ordered were fitted. Should
not be a problem though.
Cheers, Mick.

I have started the strip down tonight and will be pulling the gearbox apart tomorrow evening. Fingers crossed. Oh the play in the shaft is horrible.
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1960 A7 (57 motor to SS spec)
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