Gearbox shell differences
Posted: Sat Oct 06, 2012 2:42 pm
This week I was made aware of a comment by an author (may have been Roy Bacon) that the gearbox shell was different for the G15/P11 range of bikes.
Going by the part books, the std. shell has p/n 040144 while the hybrids had p/n 040413. The 500CS had yet another shell, p/n 040443.
Can anyone shed a light on the differences? Material? Heat treatment? Different machining? Bolt sizes for fixation to the engine plates?
For the roadsters, the hybrids and the 500CS, upper fixing bolt size is identical at 7/16". The pivot bolt size was initially 9/16" (p/n 000318) until MY1963 and for MY 1964 on it appears to be of smaller size (7/16") for the hybrids and all roadsters (p/n 024276, 033153).The 500CS stayed with the 9/16" bolt it seems.
I am beginning to think that the std. shell was actually 040413 for MY1964 on, but maybe there was another subtle change?
Any information on these shells is most welcome.
Knut Sonsteby
Going by the part books, the std. shell has p/n 040144 while the hybrids had p/n 040413. The 500CS had yet another shell, p/n 040443.
Can anyone shed a light on the differences? Material? Heat treatment? Different machining? Bolt sizes for fixation to the engine plates?
For the roadsters, the hybrids and the 500CS, upper fixing bolt size is identical at 7/16". The pivot bolt size was initially 9/16" (p/n 000318) until MY1963 and for MY 1964 on it appears to be of smaller size (7/16") for the hybrids and all roadsters (p/n 024276, 033153).The 500CS stayed with the 9/16" bolt it seems.
I am beginning to think that the std. shell was actually 040413 for MY1964 on, but maybe there was another subtle change?
Any information on these shells is most welcome.
Knut Sonsteby