The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Frame => Topic started by: RoyC on 22.10. 2017 16:18

Title: Fork springs
Post by: RoyC on 22.10. 2017 16:18
Is it possible to change the fork springs without removing the forks ?
Thanks,
Roy.
Title: Re: Fork springs
Post by: chaterlea25 on 22.10. 2017 16:28
Hi Roy
Short answer No  *ex*
It is possible to drop out the fork legs and mudguard complete if you can raise the front end high enough
Its not a big job to pull the front end apart to change the springs

John
Title: Re: Fork springs
Post by: RoyC on 22.10. 2017 16:52
Thanks John.
Title: Re: Fork springs
Post by: RoyC on 23.10. 2017 08:57
I have ordered my springs (BSA A10 A50 A65 SIDECAR FORK SPRINGS PAIR 'NEW' 42-5145) from http://www.ebay.co.uk/itm/BSA-A10-A50-A65-SIDECAR-FORK-SPRINGS-PAIR-NEW-42-5145-UK-MADE-/322682937187?hash=item4b2166df63:g:QWgAAOxyUrZSpGXo  .
Do I need to get any special tools to do the spring change ?
Thanks,
Roy.
Title: Re: Fork springs
Post by: JulianS on 23.10. 2017 09:37
There is a tool which screws into top threads and acts as a drift when hit with a hammer to separate shaft from taper - then it is used to draw the shaft back throught the yokes on reassembly. Part 61 3350 in photo.

Link is to a commonly available tool.

http://www.ebay.co.uk/itm/FORK-STANCHION-REMOVAL-INSTALL-TOOL-BSA-NORTON-TRIUMPH-/331185703113?epid=677694663&hash=item4d1c34c8c9:g:ICQAAOSwR29ZHAq9
Title: Re: Fork springs
Post by: bsa-bill on 23.10. 2017 09:58
Quote
screws into top threads and acts as a drift when hit with a hammer to separate shaft from taper

ouch
Title: Re: Fork springs
Post by: RoyC on 23.10. 2017 10:48
There is a tool which screws into top threads and acts as a drift when hit with a hammer to separate shaft from taper - then it is used to draw the shaft back throught the yokes on reassembly. Part 61 3350 in photo.

Link is to a commonly available tool.

http://www.ebay.co.uk/itm/FORK-STANCHION-REMOVAL-INSTALL-TOOL-BSA-NORTON-TRIUMPH-/331185703113?epid=677694663&hash=item4d1c34c8c9:g:ICQAAOSwR29ZHAq9

Thanks Julian.
Just ordered it, although it doesn't look like the one in your photo, or am I missing something ?  *doh*
Title: Re: Fork springs
Post by: JulianS on 23.10. 2017 11:07
The modern multi bike tools are longer. 
Title: Re: Fork springs
Post by: RoyC on 23.10. 2017 12:02
The modern multi bike tools are longer.
Thanks Julian
Title: Re: Fork springs
Post by: RoyC on 25.10. 2017 09:42
Tools and springs have arrived.
Could someone tell me what all the round plugs are for ?
Title: Re: Fork springs
Post by: KiwiGF on 25.10. 2017 11:39
I've not used a tool like that (I use an old fork cap nut welded to some studding to pull the stanchions up) but I think you need to use just one of the plugs supplied (the one that has the correct thread for bsa forks), this screws temporarily into the stanchions, and the tool then uses the plug to pull the stanchions up ?
Title: Re: Fork springs
Post by: RoyC on 25.10. 2017 13:42
I've not used a tool like that (I use an old fork cap nut welded to some studding to pull the stanchions up) but I think you need to use just one of the plugs supplied (the one that has the correct thread for bsa forks), this screws temporarily into the stanchions, and the tool then uses the plug to pull the stanchions up ?
Thanks kiwgf.
I did eventually sort it out.
Job all done, it was a lot less complicated than I was dreading.
Thanks to all for the help, AGAIN.
Roy.
Title: Re: Fork springs
Post by: RoyC on 25.10. 2017 16:22
What w fork oil do you recommend? Ebay have everything from 5w to 30 w.
 
Just a few pictures.
Title: Re: Fork springs
Post by: JulianS on 25.10. 2017 18:17
I use 20 which is fine for normal solo use, you might find 30 better with your outfit, but worth trying both to see which suits you.

I think anything under 20 a bit too thin for our old design forks.
Title: Re: Fork springs
Post by: RoyC on 25.10. 2017 19:20
I use 20 which is fine for normal solo use, you might find 30 better with your outfit, but worth trying both to see which suits you.

I think anything under 20 a bit too thin for our old design forks.
Thanks Julian, I've ordered some 30w.
Title: Re: Fork springs
Post by: ellis on 25.10. 2017 20:00
Had 20w in at first but the ride was to harsh so now I run with 10w in and its much smoother. By the way I do have SRM damper rods in so 20w may have been too thick.     *beer*

ELLIS
Title: Re: Fork springs
Post by: Topdad on 26.10. 2017 11:06
I've got damper rods from George Prew and use 30 grade  this suits me fine but of course it as been noted that recently I'm even more of a fat ba'tard ,it's the winter coming don't you know !! *smile*