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#700771 - 07/04/17 9:47 pm Pre-Early Five Speed?  
Joined: Jan 2004
Posts: 3,433
DMadigan Online content
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DMadigan  Online Content
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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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#700812 - 07/05/17 6:04 am Re: Pre-Early Five Speed? [Re: DMadigan]  
Joined: Feb 2014
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C.B.S Online content
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C.B.S  Online Content
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I have read this info before. Perhaps John Healy? Any photos?

#700960 - 07/06/17 8:38 pm Re: Pre-Early Five Speed? [Re: DMadigan]  
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Stuart Online content
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Stuart  Online Content
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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,

#701003 - 07/07/17 1:06 am Re: Pre-Early Five Speed? [Re: DMadigan]  
Joined: Aug 2012
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Dana_twin Online confused
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Dana_twin  Online Confused
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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, Mike Carter 


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