·The crankshaft was u work of art
with split, roller bearing big-ends
(two to ('ach "throw" as in a V-twin)
while the design of the cylinder heads
was unusual. Eadl cylinder block
consisted of a Gist Jiglll alloy waterjackl,t with the cylinder he-dds imegral. Imo the block were screwed the
four cast-iron "wet-liner" cylinder
bores. The two val ves pl'r cy1inder
seated din'ctly into the heads without
insells.
Compression ratio was fairly low
at len to one and the power from the
original engines (lhe machines fir t
appeared at the 1955 Belgian GP
where they were tried out in prdclice
but not r
