Author Topic: Kick quadrant shaft  (Read 253 times)

Offline muskrat

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Kick quadrant shaft
« on: 12.09. 2020 10:00 »
G'day Fellas.
Does anyone have a good quadrant shaft to measure. The thickness of the shaft where the cotter pin goes. Mine is 0.540". I have two new kick levers and the cotter nearly goes all the way through and after a few kicks needs to go further. I may need to build up the shaft.
Cheers
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Offline Greybeard

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Re: Kick quadrant shaft
« Reply #1 on: 12.09. 2020 10:07 »
What about making an oversized cotter pin.

Online RDfella

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Re: Kick quadrant shaft
« Reply #2 on: 12.09. 2020 10:56 »
Are you using a new kickstart lever? I've had to cut the bottom off before now and weld an old one on because either the shaft hole is too big or the cotter hole is too far off centre of shaft - or both.
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Online berger

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Re: Kick quadrant shaft
« Reply #3 on: 12.09. 2020 10:56 »
musky two of mine about 0.5570

Offline muskrat

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Re: Kick quadrant shaft
« Reply #4 on: 12.09. 2020 21:35 »
G'day Fellas.
Thanks bergs, I thought my shaft was worn (clean thoughts fellas).
Yes RD, both new/newish. The newest one the shaft hole is a little large and I think both have the cotter hole too high.
GB, yes I've tried an o/s cotter pin. Makes very little difference.
With the newish one (only a hundred or so kicks) I've had to use a 20thou shim between the shaft and cotter, hence buying another new one!
Bl@@dy pattern parts  *rant*. They'd be OK if made exactly to the pattern.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Online ironhead

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Re: Kick quadrant shaft
« Reply #5 on: 12.09. 2020 23:34 »
G'day Musky.  The pattern ones  *rant* I've  had the misfortune to have anything to do with seem to be made of cheese.
Or they missed the final process, CASE HARDENING!!  The original BSA shafts were hardened.  Maybe if you have the later type that the shaft presses out of the quadrant splines. take the new one to your nearest heat treatment place & see if they can case harden it for you?
Be good to know what its made of though as some steel will & some won't. I suspect the stuff they use is cheap low carbon machinery steel so may be worth a go.
PS  Lithgow guns would have done a lot of that work, maybe they still do.
SA

Online Peter in Aus

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Re: Kick quadrant shaft
« Reply #6 on: 13.09. 2020 01:14 »
H Musky the one I'm working on is .748, I think it should be .750 as mine seem to have a bit of wear.
Cheers,
Peter

Busselton West Australia
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Offline muskrat

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Re: Kick quadrant shaft
« Reply #7 on: 13.09. 2020 05:33 »
G'day ironhead.
I'd say the shaft i the original 1957 and it does have a bit of wear where the kicker rocks (in & out) when the cotter loosens. I could turn it down and either sleeve it or build up with weld and grind back. That way I can match the dodgy new kicker.

G'day Peter.
I meant the thickness of the shaft where the cotter pin goes. Mine is 0.540", berger measured two of his at 0.557 so mine is almost 20 thou worn.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Online Peter in Aus

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Re: Kick quadrant shaft
« Reply #8 on: 13.09. 2020 06:50 »
Sorry Musky, I see what you want mine is .557
Peter

Busselton West Australia
49 A7 longstroke
58 A10  SA

Offline morris

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Re: Kick quadrant shaft
« Reply #9 on: 13.09. 2020 21:24 »
Measured a spare one at .567  No wear marks so looks like a good one
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Online ironhead

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Re: Kick quadrant shaft
« Reply #10 on: 14.09. 2020 00:02 »
G'day ironhead.
I'd say the shaft i the original 1957 and it does have a bit of wear where the kicker rocks (in & out) when the cotter loosens. I could turn it down and either sleeve it or build up with weld and grind back. That way I can match the dodgy new kicker.

G'day Peter.
I meant the thickness of the shaft where the cotter pin goes. Mine is 0.540", berger measured two of his at 0.557 so mine is almost 20 thou worn.
Cheers

G'day musky,  I thought at first you were talking about the dodgy shafts out there *whistle.  Making a sleeve would probably be the best way to go.  Practice a bit of eccentric turning on the new lathe & make an oversize  cotter pin with a shorter, steeper taper.
SA

Online RichardL

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Re: Kick quadrant shaft
« Reply #11 on: 14.09. 2020 00:58 »
Musky,

Not sure you need more reports on this, but my two without levers on right now are 0.565" and 0.562". It's kinda amazing how close all of these are considering it's not what I'd call a precision piece and it gets a lot of abuse.

Richard L.
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Offline muskrat

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Re: Kick quadrant shaft
« Reply #12 on: 16.09. 2020 20:20 »
G'day Fellas.
Thanks for the replies.
I've got a NOS quad with shaft coming from Mike in QLD https://mikesclassiccyclespares.com/product/42-3160/
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7