1959 Matchless G12 Piston Modification Part 1

[@vidviewer100]

fascinating, I'd be very happy if I had an engine rebuilt by you. Looking forward to watching you enlarge the grooves....

[@andyfearn6609]

Hi... Thanks for posting... Out of interest did you do compression test on the engine before taking apart?

[@atlasvantech]

Hi Andy, No, not on this occasion. I pulled it apart to cure the rattle on the top end and measured the rings which were worn and replaced them while I was in there. Plenty of compression now though!

[@andyfearn6609]

Cheers... Have a 59 g12 very similar to yours... Bout 130 psi both cylinders kicking it over a couple of times.... 63 years not bad i guess...