Hello everyone.
I'm trying to confirm what the first two letters stamped on the crankcase before the hyphen and the numbers should be ??????
One I'm looking at doesn't look right, in as much the whole stamping is slightly wonky and the first two letters look like JM.
I already own a 198 and the engine number on that starts RM followed by the numbers which are nice and straight and about 5mm from the clutch housing gasket.
The wonky 199B number is about 10mm above the gasket line, and the stamped numbers and letters are not perfectly in line and a bit bigger than the 198.
The frame number on the 199B looks good, starting JB and numbers and letters look correct. Nicely in line and same size as my 198.
By the by, the 199B engine does have 6 gears.
Thanks.