Honda's ST
1100 model ran for 12 years and during that time
earned itself an enviable reputation amongst touring motorcyclists.
Now the ST has grown up and matured in to the ST 1300.
Weight is down, power
is up. But that is only half the story...
While it utilises the same V-4
configuration as the previous
model's 1,084cc engine, the performance improvements are
immediately obvious. Power is up by 20% while
torque improves by nearly 10%.
The new engine
displaces 1,261cc, but manages to be both more compact, and shorter in
overall length. The previous model's wide belt-driven cam drive was
replaced with a slim, new chain drive for lighter weight. The
combined result of these changes is a 60mm reduction in engine length and
a major reduction in the number of respective component parts.
The
engine's four valve per cylinder double overhead cam design uses
cam-over-bucket direct valve actuation. This helps keep operation simple while
reducing maintenance requirements. When routine maintenance does
become necessary, the engine's head covers are positioned for easy access
that allows even major operations to be performed with ease.
The engine is also
very aesthetically pleasing, making me think that it might just find it's
way in to some sort of power cruiser...
Like several of
Honda's most high-performance motorcycles, the new ST now
features advanced aluminium composite cylinder sleeves that are lighter in
weight, more resistant to wear and more effective at transferring heat
than conventional iron sleeves. Riding inside these new sleeves are
lightweight aluminium pistons. These feature a new 'Lube-Coat'
surface process that reduces friction and contributes to the engine's
sharper response and acceleration.
Fuel is delivered to the highly refined
new engine by Honda's excellent PGM-FI injection
system. The four 36mm throttle bodies are fed from a
29-litre dual element fuel tank. I covered 2,800km in three days
aboard the new ST and the machine returned
between 350 and 500km per tank depending on the
pace. An unmatched touring range in my experience.
Fluid drive is fed
through a faultless 5-speed gearbox via the maintenance-free shaft final
drive system. The old ST powerplant was fairly smooth and fuss free
but this new combination reaches a much higher level of refinement. |