BritBike Forum logo
BritBike Sponsor BritBike Sponsor BritBike Sponsor
BritBike Sponsor

BritBike Sponsor

BritBike Sponsor
BritBike Sponsor BritBike Sponsor BritBike Sponsor
JRC Engineering dealers
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
Go2fer
Go2fer
Netherlands
Posts: 55
Joined: June 2011
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
39 registered members (Alan_nc), 197 guests, and 218 spiders.
Key: Admin, Global Mod, Mod
Newest Members
JoeBrown, Bart223, Duckster, IDG1, pemdoc65
10173 Registered Users
Top Posters(30 Days)
Lannis 93
reverb 82
Stuart 77
NickL 67
koan58 61
Popular Topics(Views)
551,048 mail-order LSR
Forum Statistics
Forums34
Topics66,569
Posts645,348
Members10,173
Most Online3,995
Feb 13th, 2017
Like BritBike.com on Facebook

Previous Thread
Next Thread
Print Thread
Rate Thread
Pre-Early Five Speed? #700771
07/04/17 9:47 pm
07/04/17 9:47 pm
Joined: Jan 2004
Posts: 3,646
ca, us
D
DMadigan Offline OP
BritBike Forum member
DMadigan  Offline OP
BritBike Forum member
D
Joined: Jan 2004
Posts: 3,646
ca, us
I have the gearbox out of the racer that had the JG motor (one of five '72 A75V 5 Speeds built in '71). The high gear does not have a part number. This uses an R&M FB148567 roller which is not the same as the Hoffman used on the early five speeds. The land where the rollers run is 1.560" diameter compared to 1.5075" for the 57-4372 high gear. The spline for the sprocket is longer by 0.107". The roller land is 0.310" wide compared to 0.332" for the 57-4372. The dogs are narrower and shorter radially.
For what it's worth.

Support your #1 BSA Forum and our favorite sponsors

Check out BSA on e-bay: BSA Parts in UK, BSA Motorcycles in UK, BSA Parts in North America, BSA Motorcycles in North America

 
 
Re: Pre-Early Five Speed? [Re: DMadigan] #700812
07/05/17 6:04 am
07/05/17 6:04 am
Joined: Feb 2014
Posts: 1,030
Lancaster, California
C.B.S Online content

Parts Dealer
C.B.S  Online Content

Parts Dealer
Joined: Feb 2014
Posts: 1,030
Lancaster, California
I have read this info before. Perhaps John Healy? Any photos?

Re: Pre-Early Five Speed? [Re: DMadigan] #700960
07/06/17 8:38 pm
07/06/17 8:38 pm
Joined: Jun 2002
Posts: 9,688
Scotland
S
Stuart Offline
BritBike Forum member
Stuart  Offline
BritBike Forum member
S
Joined: Jun 2002
Posts: 9,688
Scotland
Hi Dave,

As it's "out of the racer" and "'71-built", are the differences likely to be due to it's a Quaife?

If John doesn't know, Quaife Engineering is still around - run by Rod's son and daughter - and the images on the site seem to show the triple is still an acknowledged part of the company's heritage. bigt

Hth.

Regards,

Re: Pre-Early Five Speed? [Re: DMadigan] #701003
07/07/17 1:06 am
07/07/17 1:06 am
Joined: Aug 2012
Posts: 591
Oregon
D
Dana_twin Offline
BritBike Forum member
Dana_twin  Offline
BritBike Forum member
D
Joined: Aug 2012
Posts: 591
Oregon
My Hurricane engine has a close ratio four speed now but was originally fitted with a five speed. Looking at the part numbers on the four speed gears in my box (pun) none of the part numbers match what is in the 1971 A75 parts manual 00-5723 FWIW... nothing to do with roller bearings used of course smile


Moderated by  Allan Gill, Jon W. Whitley 


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
(Release build 20180111)
Page Time: 0.057s Queries: 15 (0.005s) Memory: 1.0036 MB (Peak: 1.1380 MB) Zlib disabled. Server Time: 2018-04-23 02:01:48 UTC