- May 8, 2010
Looking to understand the different numbers on my Frame Head Stock, Left Side of my Motor and on the Forward portion of the Swing Arm.
By forward portion of the swing arm, do you mean the top of the transmission?-Front Frame Head Stock plate:
-Left Side of Motor
20M3S / 140461
-Forward Portion of Swing Arm
And my Frame is a 1971 ?By forward portion of the swing arm, do you mean the top of the transmission?
If so - ideally - all of these numbers should match.
From what you describe, you have a 'bitsa' - a bike that has been pieced together out of parts, or has had both catastrophic engine and transmission issues, necessitating the full replacement of each.
The engine is a late 1970, and the transmission is a 1969.
Hope this helps.
If the frame tag is the correct one for your frame, yes. The 1971 and later frame will have the centerstand mounted to the engine cradle, while the pre-'71 has the crossmember further rearward with the centerstand lugs mounted to it.And my Frame is a 1971 ?
Appreciate the above information
To better understand, look here: https://www.gregmarsh.com/MC/Norton/CommandoID.aspx and here: https://www.gregmarsh.com/MC/Norton/CommandoSurvey.aspxLooking to understand the different numbers on my Frame Head Stock, Left Side of my Motor and on the Forward portion of the Swing Arm.