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Pre-Early Five Speed? #700771
07/04/17 9:47 pm
07/04/17 9:47 pm
Joined: Jan 2004
Posts: 3,598
ca, us
D
DMadigan Online content OP
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DMadigan  Online Content OP
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D
Joined: Jan 2004
Posts: 3,598
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.

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Re: Pre-Early Five Speed? [Re: DMadigan] #700812
07/05/17 6:04 am
07/05/17 6:04 am
Joined: Feb 2014
Posts: 971
Lancaster, California
C.B.S Online content

Parts Dealer
C.B.S  Online Content

Parts Dealer
Joined: Feb 2014
Posts: 971
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: 9,536
Scotland
S
Stuart Online content
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Stuart  Online Content
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Joined: Jun 2002
Posts: 9,536
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: 585
Oregon
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Dana_twin Offline
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Dana_twin  Offline
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Joined: Aug 2012
Posts: 585
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 


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