The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Frame => Topic started by: Will on 13.03. 2020 17:58

Title: Front fork fettling
Post by: Will on 13.03. 2020 17:58
A10 fork sliders have a couple of dings where the mudguard studs are and are obstructing the bush passing and lower down on the other slider , I have been trying to rub them out all afternoon, anyone got any tips ideally they need matching out
Title: Re: Front fork fettling
Post by: Billybream on 13.03. 2020 19:01
You could try some Emery flap wheels, mount them on a power drill flexible drive, alternatively you could attach some emery to a round dowl to attempt to reach the damaged area, not an easy task but might salvage your legs.
Second hand legs do appear on Ebay, but they are normally not the version you require.
A decent machine shop might have a solution by hone or grind function.
Title: Re: Front fork fettling
Post by: Will on 13.03. 2020 19:08
You could try some Emery flap wheels, mount them on a power drill flexible drive, alternatively you could attach some emery to a round dowl to attempt to reach the damaged area, not an easy task but might salvage your legs.
Second hand legs do appear on Ebay, but they are normally not the version you require.
A decent machine shop might have a solution by hone or grind function.

Thanks Billy that’s what I been doing i gave up after 4 hours only a slight improvement
Title: Re: Front fork fettling
Post by: muskrat on 13.03. 2020 19:26
G'day Will.
If I had that problem (which I haven't) I'd make a dolly/drift long enough to get past the tight spot by a few inches and same diameter as the bush plus 1 thou". Push in until it gets to the tight spot and use a gas torch to heat that spot till the dolly can be pushed past.
DISCLAIMER this is just a thought, might work/might not.
Cheers
Title: Re: Front fork fettling
Post by: Jules on 17.03. 2020 09:40
I used the round dowel + emery to clean up my forks and you are right it takes hours! I used to do it for some time then leave it and come back a few days later and do a bit more etc etc, but I got there in the end  ;) - my dowel rod though wasn't fully round, I had 2 flat sides and 2 round sides, maybe that made it easier??
Title: Re: Front fork fettling
Post by: Will on 17.03. 2020 17:48
Thanks Jules I have just made a tool with 28 mm flap wheel and some threaded bar hopefully that will make it easier  *smile*
Title: Re: Front fork fettling
Post by: Swarfcut on 17.03. 2020 18:04
    The downside of removing too much material from the slider is that it obviously thins the tube.   

    For a big ding, Musky's way is worth a try.  A plug to fit the tube, tapered at both ends and with a nice piece of threaded bar to enable it to be pulled out, hammered in with a little bit of red heat should do it.  Taper on the topside gives a second bite on the way out. Not too much heat, or they will stick. Not ideal, but worth a go in the absence of any prospect of coming across a better part in the short term.

 Add..Musky's disclaimer.

 Swarfy.
Title: Re: Front fork fettling
Post by: bsa-bill on 17.03. 2020 18:46
The advice I got from an engineer at our local town when saying I had a fork leg I intended to take a dent out of - heat both side of the fork, the ding and opposite it