BritBike Forum logo
BritBike Sponsor BritBike Sponsor BritBike Sponsor
BritBike Sponsor

BritBike Sponsor

BritBike Sponsor
BritBike Sponsor BritBike Sponsor BritBike Sponsor
Jwood & co JRC Engineering dealers Jwood & co
Home | Sponsors, Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons, "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
Keane Lucas
Keane Lucas
New Jersey
Posts: 375
Joined: August 2014
Show All Member Profiles 
Shout Box
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Who's Online Now
36 registered members (998John), 284 guests, and 404 spiders.
Key: Admin, Global Mod, Mod
Newest Members
vietnammotorbike, Lennart Liljedah, Mal Wood, FireGuyKC, spuggy
10288 Registered Users
Top Posters(30 Days)
Stuart 94
Lannis 65
Mori55 60
Popular Topics(Views)
636,061 mail-order LSR
Forum Statistics
Forums34
Topics67,365
Posts654,057
Members10,288
Most Online3,995
Feb 13th, 2017
Like BritBike.com on Facebook

Previous Thread
Next Thread
Print Thread
Rate Thread
4 speed transmission interchangability #345590
11/29/10 3:36 am
11/29/10 3:36 am
Joined: Apr 2007
Posts: 207
Ontario , Canada
P
peter berry Offline OP
BritBike Forum member
peter berry  Offline OP
BritBike Forum member
P
Joined: Apr 2007
Posts: 207
Ontario , Canada
I am looking at a complete 4 speed transmission , layshaft & main shaft with gears . Are they interchangable between all 650 unit twins or are they specific to years Thanks Peter
76 T140
66 TR6 project

Support Your #1 BritBike Forum!

Check out British motorcycles for sale:
British Motorcycles on e-Bay UK, British motorcycles on e-Bay North America
Check out British motorcycles for sale:
British Motorcycles on e-Bay UK, British motorcycles on e-Bay North America
Re: 4 speed transmission interchangability [Re: peter berry] #345807
11/30/10 8:09 pm
11/30/10 8:09 pm
Joined: Apr 2007
Posts: 207
Ontario , Canada
P
peter berry Offline OP
BritBike Forum member
peter berry  Offline OP
BritBike Forum member
P
Joined: Apr 2007
Posts: 207
Ontario , Canada
Any body have any idea on this would be greatly appreciated , cant find anything specific in the archives Thanks again Peter

Re: 4 speed transmission interchangability [Re: peter berry] #345822
11/30/10 9:19 pm
11/30/10 9:19 pm
Joined: Mar 2005
Posts: 10,154
Boston, Massachusetts
J
John Healy Offline

BritBike Forum member
John Healy  Offline

BritBike Forum member
J
Joined: Mar 2005
Posts: 10,154
Boston, Massachusetts
As a donor set, all bits from a single motorcycle, they are interchangeable from 1964 (1963 has a different high gear spline) to 1970. 1971-72 can also be used with a bit of thought, again you want a set of gears from a single donor motorcycle.

There were changes in the diameters of the shafts and gears, some were made by BSA to a different standard than Triumph used, and you need to be a wiz kid to sort out an odd set of 4 speed gears and shafts. It can be done, but some experience required.


Re: 4 speed transmission interchangability [Re: peter berry] #345823
11/30/10 9:24 pm
11/30/10 9:24 pm
Joined: Sep 2001
Posts: 2,796
Comox BC Canada
G
Gordo in Comox Offline
BritBike Forum member
Gordo in Comox  Offline
BritBike Forum member
G
Joined: Sep 2001
Posts: 2,796
Comox BC Canada
John: Does any of the above rational apply to the mixing and matching of unit T100 gears sets between the years, either complete sets or odd gears?

Thanks

Gordo


Without frequent roadside repairs there is no fun in riding!
Re: 4 speed transmission interchangability [Re: Gordo in Comox] #345828
11/30/10 9:47 pm
11/30/10 9:47 pm
Joined: Apr 2007
Posts: 207
Ontario , Canada
P
peter berry Offline OP
BritBike Forum member
peter berry  Offline OP
BritBike Forum member
P
Joined: Apr 2007
Posts: 207
Ontario , Canada
Thanks , Im looking at a complete matched 4 speed set not sure what year Peter

Re: 4 speed transmission interchangability [Re: peter berry] #345839
12/01/10 12:36 am
12/01/10 12:36 am
Joined: Mar 2005
Posts: 10,154
Boston, Massachusetts
J
John Healy Offline

BritBike Forum member
John Healy  Offline

BritBike Forum member
J
Joined: Mar 2005
Posts: 10,154
Boston, Massachusetts
Gordo:

There does not seem to be the same situation with the 500 gear sets. To my knowledge all of the 500 gears and shafts were all made in Meriden using the Triumph standard for shafts diameters and gear bores.

There is a Wall Poster based upon some work done by Jack Shortland, US export parts manager, and a couple of others. It illustrates both the BSA and Triumph standards and gives dimensions. It also has an interchange which in theory was intended to allow you to identify alternate gears, but as Jack confided to me that even they could not sort all of this out and the chart was their "best guess".

I am sure some one can post the dimensions which should help people identify compatible gears and shafts.


Re: 4 speed transmission interchangability [Re: peter berry] #345871
12/01/10 6:46 am
12/01/10 6:46 am
Joined: Sep 2001
Posts: 2,796
Comox BC Canada
G
Gordo in Comox Offline
BritBike Forum member
Gordo in Comox  Offline
BritBike Forum member
G
Joined: Sep 2001
Posts: 2,796
Comox BC Canada
Thanks John.

Gordo


Without frequent roadside repairs there is no fun in riding!
Re: 4 speed transmission interchangability [Re: peter berry] #345887
12/01/10 9:15 am
12/01/10 9:15 am
Joined: Oct 2003
Posts: 3,605
Emsworth, sunny south of Engla...
D
dave jones Offline
BritBike Forum member
dave jones  Offline
BritBike Forum member
D
Joined: Oct 2003
Posts: 3,605
Emsworth, sunny south of Engla...
Peter- The only things I can think of that would be of any use is that in 1968 the clutch oil seal changed in size to run on the high gear itself rather than the high gear bush. Not sure if you need the whole plate behind the clutch to go with this or if you can use the same one. The other thing is that early machines require the speedo to be driven from the gearbox and early gearsets are designed for this. Otherwise, as John Healy says, you can put any four speed set in.
Don't know if you can put a four speed in five speed cases.
Dave

Re: 4 speed transmission interchangability [Re: dave jones] #346071
12/02/10 5:32 am
12/02/10 5:32 am
Joined: Sep 2008
Posts: 289
Goldendale, Washington
4
40 Below! Offline
BritBike Forum member
40 Below!  Offline
BritBike Forum member
4
Joined: Sep 2008
Posts: 289
Goldendale, Washington
Yes, you can put a 4spd in a 5 spd case.


"Growing old is obligatory - growing up is optional"
2015 HD Geezer Glide
85 Sportster Rocket Ship
69 Sportster resto project
66 TR6SR(750 tracker)
?? TR25 tracker
67 441 resto project
Re: 4 speed transmission interchangability [Re: 40 Below!] #346076
12/02/10 8:04 am
12/02/10 8:04 am
Joined: Jul 2007
Posts: 451
redondo beach, ca
Bob G Offline
BritBike Forum member
Bob G  Offline
BritBike Forum member
Joined: Jul 2007
Posts: 451
redondo beach, ca
I seem to remember the old Glenn's Triumph manual had a very detailed chart that showed gear and shaft interchangeability (with part numbers) between the different years.
Thia would be a great help for anyone trying to mix and match transmission parts.


Bob Gregor
Re: 4 speed transmission interchangability [Re: Bob G] #346098
12/02/10 12:19 pm
12/02/10 12:19 pm
Joined: Apr 2007
Posts: 207
Ontario , Canada
P
peter berry Offline OP
BritBike Forum member
peter berry  Offline OP
BritBike Forum member
P
Joined: Apr 2007
Posts: 207
Ontario , Canada
I think I have an old Glens lying around I will take a look Thanks


Moderated by  John Healy 


Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.6.1.1