Suzuki Announces New 2015 RM-Z450
Suzuki Motor Corporation has today announced the launch of its most
radically-changed production motocross machine in recent years; the
new 2015 RM-Z450 that is directly derived from the Factory bikes
currently being raced by Clement
Strijbos and James
Stewart in the World MXGP, AMA Supercross and AMA Motocross
After several years of regular refinements and improvements since its introduction in 2005 - plus a major redesign in 2008 - the 2015 RM-Z450 features a multitude of cutting-edge innovations tried-and-tested by Rockstar Energy and Yoshimura Suzuki Factory Racing riders in world championship competition.
The most-eagerly-anticipated feature for 2015 is the revolutionary 'Suzuki Holeshot Assist Control' system (S-HAC), plus the new Showa SFF-AIR front forks, although the machine features a multitude of further improvements and changes.
Suzuki Holeshot Assist Control:
The 'Suzuki Holeshot Assist Control' system features two different
modes to aid a rider to get-out-of-the-gate faster and
more-efficiently than ever: For hard surface or slippery conditions
at the starting gate, choose A-Mode. In this setting, Holeshot
Assist Control alters ignition timing to reduce wheel slip and to
deliver smooth acceleration to take you into the lead. Then after
1.2 seconds (or when you reach third gear), the system returns to
normal ignition timing. When conditions at the starting gate
provide better traction, and a more aggressive launch is needed,
choose B-Mode. For these conditions, Holeshot Assist Control
advances ignition timing to allow increased throttle response and
stronger acceleration off the line. One of three conditions will
then return the ignition to normal operation: after 4.5 seconds has
passed since launch - when you shift to fourth gear - or when the
throttle is closed (whichever happens first). You can turn the
Holeshot Assist Control system Off when no holeshot assistance is
Showa SFF-AIR Front Forks:
Also brand-new for 2015 are the state-of-the-art Showa SFF-AIR
(Separate Function front Fork-AIR) which are an advancement on last
year's SFF forks, which featured a coil spring in one side and an
oil-damper in the other fork-leg. The latest forks do-away with any
need to buy different-rate springs and then having to make further
adjustments to suit the riders' weight or skill-level. Now, the
forks are tuned and dialled-in via a pump and the heaviest part -
the coil spring - eliminated saving 1.100g weight.
The weight saving has also allowed Showa to increase the tube diameter (now 49mm from 48mm in 2014) and also increase the piston (39mm from 38mm) and rod size (14mm from 12.5) for greater suspension performance. Adjustment and tuning is now carried-out via three separate air valves - an inner and outer air pressure valve on the top of the fork and a balanced air pressure valve on the lower fork.
Other New 2015 Features:
Since its launch nine years ago - and as the first motocross
machine to feature electronic fuel-injection - the RM-Z450 has won
the World MX1 Motocross Championship (Steve Ramon in 2007), six AMA
Supercross and Motocross titles (Ricky Carmichael, Chad Reed and
Ryan Dungey) plus 10 further national titles in total from
Australia (Daryl Hurley, Matt Moss and Chad Reed), Germany (Ken
Roczen and Marcus Schiffer), New Zealand (Daryl Hurley) and Japan
Each year, Suzuki has worked closely with its Factory teams to make improvements to its production bikes following extensive testing; and for 2015, the RM-Z450 gets many new modifications that have also led to an overall curb-weight reduction of 1kg.
- Redesigned Frame: Internal frame parts are
reshaped to optimise rigidity and weight reduced by 4% without
- Improved Engine Starting: A longer, re-shaped
kickstarter lever, redesigned de-compression system, revised
kick-drive gear ratio, relocated kick idle gear and the addition of
a breather gear to improve engine starting.
- Improved Cooling: The water hose routing is
now revised, along with a redesigned water pump cover for
- Smoother Gear-Shifting: Gear-matching
precision is increased, along with a revised gear-shift cam for
more-precise and smoother operation.
- US Models: Now feature an extra internal
muffler pipe to comply with AMA regulations.
2015 Suzuki RM-Z450 Image Gallery
(Click for full size images)
Source: Team Suzuki