classic motorcycle forum

The VintageBike Message Board => Autojumble => Topic started by: rap on February 07, 2006, 12:22:05 PM

Title: bsa m21
Post by: rap on February 07, 2006, 12:22:05 PM

Am looking for m21 engine crank and flywheels as have 3 m20,s and want to build an m21 motor. Any help would be appreciated
       Thanks Graeme.

Title: Re: bsa m21
Post by: terryk on April 08, 2007, 09:07:14 PM

Hi mate you only need the m21 flywheels all the rest is the same as m20. The piston is shorter though. regards terry