HONDA CBR1000SP2

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The CBR1000RR SP2 is a model for the true enthusiast and primarily built for
race modification; the CBR1000RR SP2 is instantly
recognised by its exclusively built Marchesini wheels
and commemorative 25th anniversary emblem.

The real differences between the CBR1000RR SP and CBR1000RR SP2 – and
what gives the Fireblade SP2 the ultimate racing potential – is what
lies inside the engine and in turn the modification options which give
full play to an evolved race ready performance.
The CBR1000RR SP2 has exclusive gold Marchesini aluminium forged wheels
to reduce front/rear wheel inertia by 18/9%. Marchesini and Honda
achieved a high level of durability and reliability using a racing
design, proven in the most extreme international motorcycle
competitions.
Combining the design and production process of Marchesini with the
know-how of Honda allowed dramatic improvement of the strength and
weight balance of the wheels, in comparison with the general cast units.

The new electronic control system provides constant, selectable and
fine-tuneable rider support. The 9-level Honda Selectable Torque Control
system (HSTC)precisely manages rear wheel traction via the FI-ECU and
Throttle By Wire (TBW). Wheelie Control works by detecting differences
between front and rear wheel acceleration and adjusting the engine
output by altering the TBW throttle position.

The new Anti-Lock Braking System (ABS) works with a 5-axis Inertial
Measurement Unit (IMU), maintaining excellent stability even when
braking in a turn. Rear Lift Control (RLC) uses acceleration information
from the IMU to control braking force before excessive rear lift occurs
when braking hard.

While the 76mm bore is identical to the SP, the Fireblade SP2 cylinder
head runs 1mm larger 31.5mm diameter intake valves and 1.5mm larger
25.5mm diameter exhaust valves, with 10°/12° included valve
intake/exhaust included valve angles (from 11°/11°). The valve pitches
are identical, maintaining cylinder head width.
It runs the same 13.0:1 compression ratio but uses valve shapes and
combustion chambers optimised for efficiency. Elongated spark plugs and a
water jacket tightly wrapped around the combustion chambers improve
cooling; this technology is derived directly from Honda’s RC213V MotoGP
machine.
The pistons use an exclusive crown design with heat treatment that
strengthens the area around the piston boss, which itself employs a
2.5mm shorter (and 8g lighter per cylinder) piston pin. Ready to house
high-lift camshafts the outer diameter of the valve lifter has grown 2mm
to 28mm, while total height and thickness have been reduced saving
weight.