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Just one thing; the M33 engine is subtly different from a B33 engine. The flywheels off the M33 are heavier and the connecting rod is a different length on centres (I can’t remember whether longer or shorter) resulting in the hole in the piston being in a different position. Evidently all in aid of the M33 being more suitable for pulling a sidecar.

Lovely bike. Sounds well.

Nice

I had a B33 back in the day. Top speed 80mph flat out. Dead reliable though.

Should have said, “resulting in the hole in the piston FOR THE GUDGEON PIN being in a different position. RAHG

Another great classic English motorcycle!! Only: where are the youngsters?? Have they lost the art of kick starting and riding these classic beauties??