classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: glaser 31 on September 01, 2011, 05:22:47 PM

Title: help needed with this gearbox Moss
Post by: glaser 31 on September 01, 2011, 05:22:47 PM

I have this Moss gearbox, it has stamped into it R3 744.anyone know what bike it fit ?
thanks
Glaser

Title: Re: help needed with this gearbox Moss
Post by: rogerwilko on September 01, 2011, 07:19:56 PM

An Aston Martin??

Title: Re: help needed with this gearbox Moss
Post by: chaterlea25 on September 01, 2011, 09:46:11 PM

Hi Glacer,
How about a few photos of the gearbox??
Moss boxes were fitted to quite a few 20's bikes, but like sturmey/albion/burman
they come in a bewildering array of fitments and sizes  ???
I have a Moss hand book from the 20's , I got this to assist in the rebuild of the Moss for my Chater Lea
I will check what numbers, letters are on my boxes of bits tomorrow

Regards
John

Title: Re: help needed with this gearbox Moss
Post by: glaser 31 on September 02, 2011, 06:15:39 AM

hi John,
sounds great,hope this photo is usefull
regards Glaser

Title: Re: help needed with this gearbox Moss
Post by: chaterlea25 on September 02, 2011, 11:35:40 PM

Hi Glaser,
I have never come across anything that looks like your photo  ???
The book I have is for 3 speed types SL3s and SM3s
From your photo yours is more like the 4 speed??????
Some Moss boxes are remarkably similar to Sturmey Archer externally :o
BUT they do not have a crash second gear, the gears are constant mesh and the engagement is done with a sliding dog
I think I finally have all the bits to rebuild the one for my Chater Lea, I had to have some gears made and have the mainshaft ground, and the output sleeve (gear is splined on) spark eroded and a bush fitted
Hope the photos attached are of some help?
Regards
John

Title: Re: help needed with this gearbox Moss
Post by: glaser 31 on September 06, 2011, 06:03:48 PM

hi John,
ok thanks fore the help,I hoped someone mayby know what bike it could fit  :)
Is your bike with the moss on the photo ? ,I mayby have some spares used fore this
regrads Glaser

Title: Re: help needed with this gearbox Moss
Post by: chaterlea25 on September 07, 2011, 09:59:56 PM

Hi Glaser,
The gearbox for my Chater Lea Supersports is the one in the top pic. SL3s,
this is the one with 4 spring clutch, the other has a single spring , identified by a long threaded end on the mainshaft
Can you let me know if you have any spares for this type?
The Moss for the Chater Lea one is a close ratio type

Regards
John