What do the Suzuki faithful get for 2013? Showa SFF forks, lighter pistons, redesigned trannies and the great Suzuki cornering ability; Plus, the BNG RM85
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2013 SUZUKI RM-Z450
For 2013, the RM-Z450 is also redesigned to give riders an even greater edge. Its powerful, four-stroke liquid-cooled four-valve engine features updates including a new lighter piston, revised piston pin and connecting rod as well as a new intake cam – together, all of these updates help provide stronger mid-range torque and crisper throttle response. Complementing the engine improvements is a transmission update featuring revised gear shapes to 2nd, 3rd, 4th, 5th gears, along with a new shift cam to help deliver smoother and more precise shifts.
The RM-Z450 also comes with the all-new Showa Separate Function front Forks (SFF), which separates the spring and damping functions, and features fully adjustable spring preload. This makes the RM-Z450 the only production 450-class motocross bike with this innovative fork design. The new front suspension works with an updated twin-spar aluminum frame to further optimize the balance between rigidity and high-speed traction. This provides riders with incredibly precise handling and smooth performance on the toughest of tracks.
Both RM-Z models include two electrical couplers (one rich and one lean coupler) that quickly allow the rider to adjust the fuel setting to suit track conditions. Fuel settings can easily be changed to best suit the riding conditions by just connecting either coupler, all without using tools. A brand new option for 2013 – riders can now easily track engine-operating time and better manage maintenance intervals using Suzuki’s optional FI indicator light (Part no. 36380-28H00).
2013 RM-Z450 HIGHLIGHTS
The 2013 RM-Z450 uses adjustable mapping, which consists of three couplers that allow you to quickly adjust the fuel setting to suit riding conditions. One coupler contains the stock settings, a second is for a richer fuel setting than the stock setting and the third is for a leaner setting.
All-new Showa Separate Function front Fork (SFF) separates spring and damping functions. The right leg holds the spring, while the left leg incorporates the cartridge assembly to manage damping. The SFF design reduces friction, increased absorption performance and is lighter weight resulting in remarkably smooth performance over a variety of track conditions. Front fork inner tube diameter is increased from 47mm to 48mm, results in optimized stability and absorption. The spring pre-load is now adjustable, which allows a wider range of adjustment for all level of riders.
Redesigned 5-speed transmission with reshaped shift cam, stopper spring and drive shaft results in more solid shift feel, enabling more precise gear shift operation.
Riders can now track engine-operating time and better manage maintenance intervals using the optional FI indicator (Part no. 36380-28H00).
Compact and lightweight 4-stroke, 499cc, fuel-injected, DOHC engine provides extraordinary torque for awesome acceleration from idle to redline, with incredible high-rpm power.
The newly designed piston, piston pin and connecting rod are developed with use of Finite Element Method (FEM) analysis. The new piston is 13 percent lighter without any compromise to strength and rigidity. The new piston pin has Diamond-Like Carbon (DLC) surface treatment for less friction and increased durability. The new design reduces mechanical loss and helps the engine produce quicker throttle response.
Intake cam timing and amount of lift has been modified for smoother power delivery and control.
Aluminum cylinder, with Suzuki Composite Electrochemical Material (SCEM) coating, is designed for durability, light weight and efficient heat transfer.
An advanced battery-less fuel-injection (FI) system features a 12-hole fuel injector and progressive throttle linkage for instant throttle response.A new ECM with higher processing performance and a new high power ignition coil optimize combustion efficiency for increased roll-on performance.
Redesigned muffler internal parts, bottom-to-mid range power and torque are increased, resulting in improved performance without losing top end. The new muffler body now uses conventional bolts in end cap instead of rivets to simplify the replacement of the glass wool packing in the muffler.
Redesigned 5-speed transmission with reshaped shift cam, stopper spring and drive shaft results in more solid shift feel, enabling more precise gear shift operation.
The frame and seat rail have been refined for optimized rigidity balance. The result is an ideal balance of nimble handling and stability.
To maintain the RM-Z's renowned handling performance, each bike's rear suspension features a Showa Piggyback shock with setting changes and adjustments to best match with the increased engine performance and front forks changes. The design allows enhanced suspension performance for a wider variety of riders.
2013 SUZUKI RM-Z250
The RM-Z250 features a redesigned chassis and suspension, including the all-new Showa Separate Function front Forks (SFF), which separates the spring and damping functions. The right leg holds the spring, while the left leg incorporates the cartridge assembly to manage damping. With reduced friction, increased absorption performance and lighter weight, the Showa SFF provides remarkably smooth performance over a variety of tracks. The Showa SFF also offers fully adjustable spring preload.
The 2013 RM-Z250 engine is also more potent than ever thanks to revisions made to the piston, connecting rod and piston pin, as well as updated intake and exhaust cams. The result is improved mid-range torque and acceleration, which lets riders accelerate harder out of turns and power by the competition on the straights. Additionally, the RM-Z250 is equipped with a new five-speed transmission with revised gears and shift cam for smooth, precise shifting and a revised clutch release cam shape for improved clutch feel. New Dunlop MX-51 tires complete the RM-Z250’s total motocross package, delivering increased traction over a wider variety of terrain.
2013 RM-Z250 HIGHLIGHTS
The RM-Z250 usescouplers that allow you to quickly adjust the fuel setting to suit riding conditions. One coupler contains the stock settings, a second is for a richer fuel setting than the stock setting and the third is for a leaner setting.
All-new Showa Separate Function front Fork (SFF) separates spring and damping functions. The right leg holds the spring, while the left leg incorporates the cartridge assembly to manage damping. The SFF design reduces friction, increased absorption performance and is lighter weight resulting in remarkably smooth performance over a variety of track conditions. The front fork inner tube diameter has been increased from 47mm to 48mm further improving stability and absorption. The spring pre-load is now adjustable, which allows a wider range of adjustment for any level of rider.
The frame and seat rail have been refined for optimized rigidity balance. The result is an ideal balance of nimble handling and stability.
A new transmission provides smoother and crisper shifting. The clutch's cam release has also been modified for lighter operation and enhanced feel.
Riders can now track engine-operating time and better manage maintenance intervals using the optional FI indicator (Part #: 36380-28H00).
Compact and lightweight 4-stroke, 249cc, fuel-injected, DOHC engine is modified for increased reliability. It provides outstanding performance across an incredibly wide powerband.
A newly designed piston and piston pin was developed using Finite Element Method (FEM) analysis. The new piston is 3% lighter without any compromise to strength and integrity.
The crankcase reed valve has been revised for more efficient lubrication. The new oil strainer has a stronger magneto to capture contaminants from the engine oil. Together these changes contribute to better throttle response and smoother power delivery.
An advanced battery-less fuel-injection (FI) system features a 44mm throttle body with progressive throttle linkage and a 16-bit computer for instant throttle response. Aluminum cylinder, with Suzuki Composite Electrochemical Material (SCEM) coating, is designed for durability, light weight and efficient heat transfer.
Redesigned exhaust system meets new FIM sound limits while increasing mid- to high-rpm power and delivery. The new muffler body now uses conventional bolts in end cap instead of rivets to simplify the replacement of the glass wool packing in the muffler.
A new ECM with higher processing performance and a new high power ignition coil optimize combustion efficiency for increased roll-on performance.
The RM-Z250's cooling efficiency is increased thanks to a redesigned radiator fin and revised water hose routing, making the bike's high performance power output more stable, even in the most demanding conditions. RM-Z250's also features a new by-pass hose routing to simplify occasional radiator maintenance.
A new transmission provides smoother and crisper shifting. The clutch's cam release has also been modified for lighter operation and enhanced feel.
New Dunlop MX51 series front and rear tires provide enhanced traction.
The high-quality Renthal handlebars feature a tapered design and are fixed to the triple clamp on a rubber mount.
To maintain the RM-Z's renowned handling performance, each bike's rear suspension features a Showa Piggyback shock with setting changes and adjustments to best match with the increased engine performance and front forks changes. The design allows enhanced suspension performance for a wider variety of riders.
SUZUKI RM85
Although unchanged from 2012, the 2013 RM85 and RM85L carry on the powerful tradition of racing excellence in the Suzuki RM and RM-Z family. Their robust two-stroke engines produce smooth power at any RPM, with an emphasis on low- to mid-range performance. Like all Suzuki motocross bikes, the RM85 and RM85L deliver class-leading handling performance, appreciated by both amateur racers and future champions. With its smooth power delivery, loads of mid-range and lightweight handling, the 2013 RM85 and RM85L are perfect motocross bikes for riders of all skill levels.
RELATED LINKS
http://motocrossactionmag.com
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