Author Topic: 1955 A10 Golden Flash 650cc - swinging arm model - clutch problem  (Read 3324 times)

Online Rocket Racer

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  • A kiwi with a racing A10 rig and too many projects
    • NZ Classic Sidecar Racing
As mentioned the plunger and swing arm clutches are different: And sadly yes the early swing arm clutch also fitted to B series plunger bikes is ideally suited to a washing machine  *whistle*. However if most of it is not too worn *wink2* , then they can provide many years of trouble free service.
The main issue with the six spring model is the budget ball bearing races that unlike the plunger and later 4 spring both ran on rollers *good3* . More modern clutch like the BNR have proper bearings, better again  *respect*.
Once the bearings are sloppy the plates don't lift nicely and can slip and drag (yes do both  *sad2*) if not well set up. - This isnt helped by the narrow point of lift with the rod in the clutch centre. A suzuki gs550 clutch top hat styled bearing releases nicer but is a mod.

I ran this type of clutch stock standard for around 30 years on my ZB33 and it does pay to select neutral approaching intersections involving waiting, but I did used to commute on that bike in city traffic and did a lot of two up touring.

Be patient putting it back together, for the double nuts (if not using nylocks -I didnt bother) they must be thin walled.
A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
New Zealand

Offline scotty

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The budget ball bearing races can be improved with this modest upgrade from Draganfly.


Scotty
'56 A10 Red Flash
'54 B33
'98 HD FLHTPI
‘74 BMW R75-6

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The budget ball bearing races can be improved with this modest upgrade from Draganfly.

That looks like a good idea, compared with the original separate races.
A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
New Zealand

Offline BrianS

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The budget ball bearing races can be improved with this modest upgrade from Draganfly.

Hi Scotty and thanks for the recommendation. I can't find that bearing on the Draganfly site. Any chance of a link or part number please?

Brian
1955 BSA A10 Golden Flash
Exeter, Devon, UK

Offline bikerbob

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Go to Draganfly Home page click on BSA Shop info, click on Shop,
click on A7 A10 etc, click on clutch, click on six spring clutch,
click on item 19 part No 65-3911 then you should see the modified bearing including the price.

Offline BrianS

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1955 BSA A10 Golden Flash
Exeter, Devon, UK

Offline scotty

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My 6 spring has this bearing mod with surflex plates set up with a dial indicator for even lift

Works well for me

S

Scotty
'56 A10 Red Flash
'54 B33
'98 HD FLHTPI
‘74 BMW R75-6

Offline chaterlea25

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1961 Super Rocket
1963 RGS (ongoing)

Online KiwiGF

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My 6 spring has this bearing mod with surflex plates set up with a dial indicator for even lift

Works well for me

S

Same here, I'm not sure if this bearing design is a deliberate mod by Draganfly or simply a way around non availability of the original style bearing, either way it works ok, and it's what you get if you order the standard bearing from them anyway (or was several years ago), I did notice what appeared to be the ally race wearing away after relative few miles though, there was a fine grey "paste" in the bearing area on inspection, but I've done over 5000 miles on the bearing now with no probs, albeit on NZ roads so not much traffic work  *smile*
New Zealand

1956 A10 Golden Flash (1st finished project)

1949 B31 rigid “400cc hot rod” (2nd finished project, + favourite bike)

1949 C11 rigid, but why!!! (cos it was cheap)

1937 B21, project missing parts, mission impossible?

GL1800 Goldwing, well, the wife likes it

KTM 950 ADV, cos it’s 100% nuts

1952 Armstrong Siddeley Whitley for rainy days (with wife

Offline scotty

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I seem to remember a clever forum member here modified his 6 spring pressure plate to incorporate a needle roller bearing  *????*

S

Scotty
'56 A10 Red Flash
'54 B33
'98 HD FLHTPI
‘74 BMW R75-6

Offline kiwipom

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hi Brian, got this one if it is any good to you it`s yours,cheers
A10.G.Flash(cafe racer)Honda 250 vtr. Yamaha Virago XV920.

War! what is it good for?Absolutely nothing, Edwin Star.
NewZealand

Offline trevinoz

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That one looks a little short, Kiwi.
Probably from a clutch with fewer plates.

Offline kiwipom

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hi trev, yes certainly shorter that the one Brian showed I presume it was off of a Bsa got it with other spares when I bought the A10, cheers
A10.G.Flash(cafe racer)Honda 250 vtr. Yamaha Virago XV920.

War! what is it good for?Absolutely nothing, Edwin Star.
NewZealand

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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hi trev, yes certainly shorter that the one Brian showed I presume it was off of a Bsa got it with other spares when I bought the A10, cheers

A b31 owner would probably be interested in your clutch centre kiwipom.
New Zealand

1956 A10 Golden Flash (1st finished project)

1949 B31 rigid “400cc hot rod” (2nd finished project, + favourite bike)

1949 C11 rigid, but why!!! (cos it was cheap)

1937 B21, project missing parts, mission impossible?

GL1800 Goldwing, well, the wife likes it

KTM 950 ADV, cos it’s 100% nuts

1952 Armstrong Siddeley Whitley for rainy days (with wife

Offline kiwipom

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Hi kiwigf, if you need one I'll send it  it'no use to me just a piece of junk, cheers
...How are you and your after the quake Wellington got hammered
A10.G.Flash(cafe racer)Honda 250 vtr. Yamaha Virago XV920.

War! what is it good for?Absolutely nothing, Edwin Star.
NewZealand