2019 BMW S 1000 RR FIRST REVIEW
FIRST REVIEW
P58
The resultant all-new motor powers what's now a
much lighter bike weighing 434.3 pounds.
with revised cam profiles and
altered valve timing, is responsible
for at least 100Nm of torque being
available between 5500 rpm and
the short-stroke engine's 14,600
rpm limiter. And that eight pounds
of weight saving comes despite
the 2.2 added pounds entailed in
fitting the ShiftCam system.
Also, to further reduce reciprocating weight the S 1000 RR engine
now employs titanium 33.5mm inlet valves, while retaining steel for
the 27.2mm exhausts. Already weighing roughly half the amount
of steel ones, in a world first for series production motorcycles
the shafts of the titanium inlet valves are hollow-bored to reduce
weight by another 10% further. This Formula 1-derived technology is
matched by F1-type DLC-coated rocker arms which, as before, oper-
ate the valves, but these are now smaller and thus 25% lighter than in
the previous motor, allowing the engine speed to be increased safely
