BritBike Forum logo
BritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorThe Bonneville ShopBritBike Sponsor
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments.
Buy BritBike staff a coffee
Buy BritBike's staff a coffeeStill here since 1996 serving BritBike enthusiasts..
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Member Spotlight
TR6Ray
TR6Ray
Illinois, USA
Posts: 2,525
Joined: May 2010
Show All Member Profiles 
Newest Members
NTB31, B. Hunt, JM Ahumada, Michael nelson, [email protected]
10824 Registered Users
Top Posters(30 Days)
franko 139
NickL 78
DavidP 68
reverb 58
Popular Topics(Views)
972,335 mail-order LSR
a word from..
Forum Statistics
Forums34
Topics67,364
Posts677,205
Members10,824
Most Online14,755
May 5th, 2019
Who's Online Now
16 registered members (998John), 88 guests, and 445 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
A65 rear swing arm #506404 09/15/13 12:06 pm
Joined: May 2006
Posts: 198
O
oleandreas Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
O
Joined: May 2006
Posts: 198
Hello

Anyone know when BSA A65 with pre oil in frame bikes, changed from swing arm with rubber bushings to swingarm with bronze bushings ?

I have a 1968 bike (more or less) and the rubber bushings in the swingarm dont keep up with the bigger engine, need to improve stability at the swing arm, the nut on the swingarmaxle loosen easily and the bike starts to wobble ..... any other reccomendations ? wants to keep the bike with original look. else I could change to something more modern. anyone tried to turn bronze bushings for the old swingarm ( the one without lubrication nipple, i.e. the one with rubber bushings)

Last edited by oleandreas; 09/15/13 12:07 pm.
Support Your #1 BritBike Forum!

Check out British motorcycles for sale:
British Motorcycles on e-Bay UK
British motorcycles on e-Bay North America
Re: A65 rear swing arm [Re: oleandreas] #506434 09/15/13 2:05 pm
Joined: Jul 2007
Posts: 528
kelvin Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Jul 2007
Posts: 528
these should be silentbloc bushes

Re: A65 rear swing arm [Re: oleandreas] #506461 09/15/13 4:22 pm
Joined: May 2013
Posts: 5,826
Allan Gill Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: May 2013
Posts: 5,826
Ole, the 1970's definitely had a bearing type setup (whether it be bronze I don't know)

I'm sure something could be done with the standard swing arm. It would certainly last much longer. You may need a new shaft too, one which would work better as a bearing surface. Depending on how much space you have, you could possibly use a thin bush with a bearing sleeve, and the swing arm shaft going through that - That would be a better solution if there is space for it.


beerchug
Re: A65 rear swing arm [Re: oleandreas] #506509 09/16/13 1:07 am
Joined: Jul 2009
Posts: 3,518
P
Pete R - R.I.P. Offline
In Remembrance
Offline
In Remembrance
P
Joined: Jul 2009
Posts: 3,518
Burn out the rubber,and leave all the steel parts intact.You won't need the inner sleeves from the silentblocs,but leave the outer sleeves in the swingarm.
Make shouldered bronze bushes to replace the rubber.You need a spacer tube between the bushes,and that spacer will compress slightly (elastically) when you tighten the swingarm bolt.Start with generous end float (about 0.040").Tighten the bolt against the bushes (use some spacers for checking),and see how much end-float you have when it's tight.

You can then trim some off the spacer tube or bushes to reduce side-float,without binding the shoulders of the bushes against the swingarm when everything is tight.
Lastly,face off the outside of the bushes so it all just fits into the frame.

It would be a good idea to fit a grease nipple,probably in the centre underneath the swingarm.

Re: A65 rear swing arm [Re: Pete R - R.I.P.] #506546 09/16/13 9:54 am
Joined: May 2006
Posts: 198
O
oleandreas Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
O
Joined: May 2006
Posts: 198
Hello guys thanks for answers.

Pete R: where is there place for shoulders ?

maybe a drawing if possible ?

I have removed the swing arm, burned out the silentblock rubber and removed the inner sleeve and rubber of the silentblock bushings, the outer sleeve is still located in the swing arm as you described... was your suggestion to make (turn) bronze bushings that fit between the outer sleeve and the swingarmrod ? crimped on the rod or ?

If you have a drawing, you can post to facebook or email if its easier for you.

[email protected]

ole andreas

Last edited by oleandreas; 09/16/13 11:44 am.
Re: A65 rear swing arm [Re: oleandreas] #506578 09/16/13 12:15 pm
Joined: Jan 2006
Posts: 206
A
Arnstein Offline
BritBike Forum member
Offline
BritBike Forum member
A
Joined: Jan 2006
Posts: 206
Ole Andreas.. The bronze bushes must have a press fit in the swingarm and the tube which the bush shall turn on ought to be hardened and have a accurat fit between the frame plates.There should also be some kind of dust seals as on the original bushed type. The big dia.original type of bush is a thin steel split type with bronze inside.
Regards
Arnstein


Arnstein

BSA Spitfire MK3.800cc (also engine 850cc 90degree)
Honda CB450T -71
Laverda RGS 1130cc -85
Ducati 1098 -08
Re: A65 rear swing arm [Re: oleandreas] #506591 09/16/13 12:45 pm
Joined: Aug 2001
Posts: 1,861
Dave - NV Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Aug 2001
Posts: 1,861
The conversion from 'silentbloc' to bushing swing arms done by our friend Peter Huber in Germany work nicely on our Goldies.
He pulls out the complete silentbloc and then press in undersize bore bronze bushings on either end of the tube.
He makes 2 steel inserts that will run in the bushings and a spacer that fits in the center. The total length of these pieces allows them to be secured tightly between the frame lugs when the swing arm axle is tightened.

Now here is an important step ... As the swingarm cross tube is always warped during mfg welding, he now reams the undersized bushings to fit the steel inserts. There is a grease zerk in the bottom center of the cross tube.


Last edited by dave - NV; 09/16/13 12:49 pm.

Dave - NV
Re: A65 rear swing arm [Re: oleandreas] #506602 09/16/13 1:38 pm
Joined: Dec 2004
Posts: 9,992
kommando Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Dec 2004
Posts: 9,992
I put needle rollers in my B44 instead of Silentblocs and lost that wobble you get going over whitelines, bushes would do the same.

Re: A65 rear swing arm [Re: oleandreas] #506605 09/16/13 1:53 pm
Joined: Oct 2009
Posts: 524
P
pushrod tom Offline
BritBike Forum member
Offline
BritBike Forum member
P
Joined: Oct 2009
Posts: 524
Pretty sure it was the 1969 models that went to 'real' bushings. If you can find a complete assembly from 69 or 70 it will pop right in. You can also get replacement parts for a rebuild. PRT

Re: A65 rear swing arm [Re: oleandreas] #506625 09/16/13 4:27 pm
Joined: May 2013
Posts: 5,826
Allan Gill Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: May 2013
Posts: 5,826
The needle roller sounds like a good idea Kommando, I for one would like to know more on that.


beerchug
Re: A65 rear swing arm [Re: Allan Gill] #506635 09/16/13 6:06 pm
Joined: May 2006
Posts: 198
O
oleandreas Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
O
Joined: May 2006
Posts: 198
is the swing arm changed too, or can I use earlier swingarm with the newer internal from 69 - 70 ?

Re: A65 rear swing arm [Re: oleandreas] #506680 09/16/13 8:26 pm
Joined: Oct 2009
Posts: 524
P
pushrod tom Offline
BritBike Forum member
Offline
BritBike Forum member
P
Joined: Oct 2009
Posts: 524
Don't remember. Check part # ?

Re: A65 rear swing arm [Re: oleandreas] #506714 09/17/13 3:45 am
Joined: Dec 2004
Posts: 9,992
kommando Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Dec 2004
Posts: 9,992
Needle roller conversion is covered in this thread,

http://www.britbike.com/forums/ubbt...ictor+special&Search=true#Post213356

Sizes may differ for an A65 but for the B44 the sizes matched closely what Torrington had.

Re: A65 rear swing arm [Re: oleandreas] #506734 09/17/13 7:39 am
Joined: May 2013
Posts: 5,826
Allan Gill Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: May 2013
Posts: 5,826
been a while since I had my B40 and B25 SwingArms but IF i remember correctly they use the same silent block bush


beerchug
Re: A65 rear swing arm [Re: oleandreas] #506768 09/17/13 12:35 pm
Joined: Jan 2006
Posts: 2,657
Gary E Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Jan 2006
Posts: 2,657
B44 and A65 each have different part numbers.


1967 BSA Wasp
1967 BSA Hornet (West Coast Model)
1967 BSA Hornet (East Coast Model)
1968 BSA Firebird Scrambler
1968 BSA Spitfire Mark IV

Moderated by  Allan Gill, Jon W. Whitley 

Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | DVD- Manuals & Parts books
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
BritBike Sponsor
Powered by UBB.threads™ PHP Forum Software 7.7.3