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STD T mainshaft confusion #641786
02/26/16 12:56 am
02/26/16 12:56 am
Joined: Feb 2016
Posts: 55
Victoria, BC,
S
Stephen Hill Offline OP
BritBike Forum member
Stephen Hill  Offline OP
BritBike Forum member
S
Joined: Feb 2016
Posts: 55
Victoria, BC,
I am trying to replace the mainshaft in a STD T gearbox. The drive side of the keyway is pretty much missing, the non-drive side of the keyway looks okay.

I am having a difficult time identifying the part # for the shaft.
One helpful reference on this forum was from dave-NV:
"Mainshaft Info
There were 4 different mainshafts used in these gearboxes.
RRT2 shaft 42-3131 for use with needle bearings in the 'A' sleeve gear

STD(T),RR(T),DAY(T) 67-330 shaft used in both the bushing and 'T' boxes

SC(T) shaft 67-3315 is slightly different than the STD shaft. This shaft can be used in a STD box, but not visa versa.

TRI(T), STB(T) shaft 67-3313 identical to the SC shaft except the 'G' 1st gear is made as part of the shaft vs pressed on."

This suggests I need shaft 67-330 for the STD T. But the part number seems too short, and I can't find other references to this part # anywhere.

Any ideas on the part number for a mainshaft for a STD T?
Where I might be able to buy one of these??
Is this mainshaft used in other gearboxes, which might help the search???

Thanks.
Stephen Hill

BSA Gold Star eBay items

BSA Gold Star forum This board is dedicated to BSA Gold Star motorcycles.

Re: STD T mainshaft confusion [Re: Stephen Hill] #641794
02/26/16 1:41 am
02/26/16 1:41 am
Joined: Dec 2005
Posts: 534
Kansas City area
BritTwit Online content

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BritTwit  Online Content

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Joined: Dec 2005
Posts: 534
Kansas City area
You need the following format
XX-XXXX
67-330 = 67-0330

Re: STD T mainshaft confusion [Re: Stephen Hill] #641801
02/26/16 3:44 am
02/26/16 3:44 am
Joined: Feb 2016
Posts: 55
Victoria, BC,
S
Stephen Hill Offline OP
BritBike Forum member
Stephen Hill  Offline OP
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S
Joined: Feb 2016
Posts: 55
Victoria, BC,
67-0330 does not appear to be a good number.
67-3330 does. Perhaps this is the correct number?
67-3330 shows up as an A7 A10 mainshaft number.

Does anybody know if a 67-3330 mainshaft for an A10 will fit in a STD (T) gearbox??

Thanks,
Stephen Hill

Re: STD T mainshaft confusion [Re: Stephen Hill] #641838
02/26/16 12:38 pm
02/26/16 12:38 pm
Joined: Dec 2005
Posts: 534
Kansas City area
BritTwit Online content

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BritTwit  Online Content

BritBike Forum member
Joined: Dec 2005
Posts: 534
Kansas City area
Sorry. Misplaced 0. Should be 67-3330.
67-3330 will fit all A & B group gear boxes (A10 B33 Gold Star ect.)

67-3330
RR & RR.T
DAY & DAY.T
STD & STD.T

I think there is a BSA Gear Box chart some where on Brit Bike but I can't find it.

Re: STD T mainshaft confusion [Re: Stephen Hill] #641845
02/26/16 2:32 pm
02/26/16 2:32 pm
Joined: Aug 2001
Posts: 1,864
Elko, Nevada USA
dave - NV Online content
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dave - NV  Online Content
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Joined: Aug 2001
Posts: 1,864
Elko, Nevada USA
Stephen .. The guys have given you the correct p/n for the mainshaft; 67-3330. Sorry for earlier posting the incorrect number. Please bear in mind the probable reason your shaft keyway was roached out is because the poorly designed 6 spring clutch nut came loose. By all means fit a 4 spring clutch with the nut and lock washer as was OEM on later GSs and A10s.


dave - NV
Re: STD T mainshaft confusion [Re: Stephen Hill] #641850
02/26/16 3:04 pm
02/26/16 3:04 pm
Joined: Aug 2015
Posts: 1,009
Bolton Lancs UK
A
Andy Higham Online content
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Andy Higham  Online Content
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A
Joined: Aug 2015
Posts: 1,009
Bolton Lancs UK
Ensure the key has clearance on the top, it is essential the tapers sit snugly together.
Ideally if you just push the hub onto the shaft taper by hand it should "stick"


1955 BSA B31 400cc "Stargazer"
1962 Greeves 200cc "Blue Meanie"
1962/67 Greeves 350cc
1967 Greeves 360cc Challenger
1984 Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc grasstrack
2003 Aprilia RSV Mille "Lo Stregone"
Re: STD T mainshaft confusion [Re: Stephen Hill] #642279
02/29/16 2:36 pm
02/29/16 2:36 pm
Joined: Aug 2001
Posts: 1,864
Elko, Nevada USA
dave - NV Online content
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dave - NV  Online Content
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Joined: Aug 2001
Posts: 1,864
Elko, Nevada USA
A bit off topic, but 'Goldie stuff'.
Andy has brought up a good point about the possible excess height/thickness of keys.
An ugly story for you, a different key but possibly a useful warning for you GSrs.
Some years ago I was assembling an engine for our GS dirt tracker. When I fitted the part time pinion on the crank I noticed it was hard going on. Not thinking I pressed it on using the crank nut. Whoops, it didn't want to go all the on. So using my small puller I tried to get it off. No joy. aargh. I ended up heating the gear with a torch and it finally came off. Measuring the thickness of the flat little repop key showed it being too thick, but I was able to dress it down on a flat stone.

I mentioned this problem to my friend GStarRon (RIP) and he replied, "You didn't know about the fat keys"?
sheeze. I miss that guy ...

And something else possibly of interest if you don't have little pinion puller with a 'live' tip, make a protective insert that fits into the oil feed hole and protects the end of the crank.


dave - NV
Re: STD T mainshaft confusion [Re: Stephen Hill] #642285
02/29/16 3:07 pm
02/29/16 3:07 pm
Joined: Feb 2011
Posts: 3,391
Orygone
Boomer Online content

BritBike Forum member
Boomer  Online Content

BritBike Forum member
Joined: Feb 2011
Posts: 3,391
Orygone
Good stuff Dave. Looking forward to seeing you in a few weeks.


Bill B...


Boomer

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