I am afraid the GL1800 rear drive will not fit without huge modifications of the M3W. I did close to 100.000miles on GL1800's and never had any problems with reliability. I did most of it on twisty mountain roads in attac mode. Torque and BHP of the Goldwing are both outperforming the S&S engine. Could not believe that Morgan is uncapable to provide todays technology to a newly designed 3Wheeler.
