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2012 KTM Four Stroke SX-F First Looks

Wednesday, May 18, 2011
Waves of press releases on the 2012 crop of MXers keep rolling in this week to the MotoUSA office, and we just received the details on the 2012 KTM four-stroke SX models. As the only manufacturer with three four-bangers in its arsenal Team Orange has one extra machine to update every year in comparison to the rest of the moto-mills.
 
2012 KTM 250 SX-F Specs
The 2012 KTM 250 SX-F now comes with electric start just like the 350 and 450 models.
Engine: Liquid-cooled 250cc Four-Stroke Single
Bore/Stroke: 76 x 54.8 mm
Starting: Electric
Fueling: Keihin 42mm Throttle Body EFI
Clutch: Wet multi-plate, hydraulic actuation
Transmission: Six-speed, chain final drive
Final Drive Gearing: 13/48
Frame: Chromoly steel
Front Suspension: WP 48mm fork; 2-way adjustable for compression and rebound damping; 11.8-in. travel
Rear Suspension: Linkage-equipped WP 5018 gas charged shock absorber; 4-way adjustable for spring preload, high/low-speed compression, and rebound damping; 12.48-in. travel
Front Brake: 260mm disc with Brembo dual-piston caliper, stainless-steel brake line
Rear Brake: 220mm disc with Brembo single-piston caliper, stainless-steel brake line
Handlebar: Tapered Renthal
Tires: Dunlop MX51 80/100-21, 110/90-19
Steering Head Angle: 26.5 deg.
Wheelbase: 58.86 in.
Ground Clearance: 14.76 in.
Seat Height: 39.06 in.
Fuel Capacity: 7.5 liters/1.98 U.S. gallons
Claimed Dry Weight: 221.6 lbs.
MSRP: $7699
KTM 250 SX-F
 
The smallest-bore SX-F gets the electric start treatment for 2012, making KTM’s entire line of camshaft-equipped racers complete with push-button starting. An optional kick starter assembly is available for the 250 SX-F from KTM’s in-house performance PowerParts catalogue. In addition to the magic button, the quarter-liter machine also gets new EMS mapping. The WP upside-down 48mm forks recieves new seals and bushings, while both ends get new valving settings. A new rear master cylinder has been fitted to the Brembo brake system. The already sharp-looking bodywork has received a facelift with a new white airbox and number plates, a new Renthal bar pad and a redesigned and reinforced rear fender. Excel rims mated to CNC machined hubs are wrapped with Dunlop’s MX51 motocross tires.
 
KTM 350 SX-F
 
The debatably game-changing KTM 350 SX-F has forgone any internal changes, with only the EMS mapping receiving tweeks. Just as with the 250, the mid-sized thumper gets a redesigned and reinforced rear fender, white airbox and new Renthal bar pad. The 350 also will run the Dunlop MX51 tires on Excel wheels and CNC hubs laced with lighter aluminum nipples. New seals and bushing have also been fitted to the 48mm WP fork, while the suspension settings have been revised.
 
KTM 450 SX-F
 
In addition to the same updates to the suspension, bodywork and wheels as the smaller KTM SX models, the 450 SX-F gets a major change to the engine. The one major change that everyone was waiting for was fuel injection. Well, they can keep waiting. KTM doesn’t feel the need to change over to FI just yet, instead opting for a 41mm Keihin FCR carburetor. What is changed is the clutch on the big dog of the KTM motocross line. A new steel basket is outfitted with a single diaphragm spring, replacing the conventional 6 coil spring layout. Three adjustable preload settings are available on the new clutch, and a new hydraulic clutch master cylinder completes the package.
 
The 2012 KTM SX-F models should start showing up on dealer's showroom floors in June.
2012 KTM 450 SX-F Specs
The KTM 450 SX-F will still be carbureted in 2012.
Engine: Liquid-cooled 450cc Four-Stroke Single
Bore/Stroke: 97 x 60.8 mm
Starting: Electric
Fueling: Keihin 41mm FCR Carburetor
Clutch: Wet multi-plate, hydraulic actuation
Transmission: Five-speed, chain final drive
Final Drive Gearing: 14/52
Frame: Chromoly steel
Front Suspension: WP 48mm fork; 2-way adjustable for compression and rebound damping; 11.8-in. travel
Rear Suspension: Linkage-equipped WP 5018 gas charged shock absorber; 4-way adjustable for spring preload, high/low-speed compression, and rebound damping; 12.48-in. travel
Front Brake: 260mm disc with Brembo dual-piston caliper, stainless-steel brake line
Rear Brake: 220mm disc with Brembo single-piston caliper, stainless-steel brake line
Handlebar: Tapered Renthal
Tires: Dunlop MX51 80/100-21, 110/90-19
Steering Head Angle: 26.5 deg.
Wheelbase: 58.86 in.
Ground Clearance: 14.61 in.
Seat Height: 38.8 in.
Fuel Capacity: 7.5 liters/1.98 U.S. gallons
Claimed Dry Weight: 236.8 lbs.
MSRP: $8799
2012 KTM 350 SX-F Specs
KTMs 250 SX-F remains largely unchanged except for some suspension setting ans ECM revisions.
Engine: Liquid-cooled 350cc Four-Stroke Single
Bore/Stroke: 88 x 57.5 mm
Starting: Electric
Fueling: Keihin 42mm Throttle Body EFI
Clutch: Wet multi-plate, hydraulic actuation
Transmission: Five-speed, chain final drive
Final Drive Gearing: 14/50
Frame: Chromoly steel
Front Suspension: WP 48mm fork; 2-way adjustable for compression and rebound damping; 11.8-in. travel
Rear Suspension: Linkage-equipped WP 5018 gas charged shock absorber; 4-way adjustable for spring preload, high/low-speed compression, and rebound damping; 12.48-in. travel
Front Brake: 260mm disc with Brembo dual-piston caliper, stainless-steel brake line
Rear Brake: 220mm disc with Brembo single-piston caliper, stainless-steel brake line
Handlebar: Tapered Renthal
Tires: Dunlop MX51 80/100-21, 110/90-19
Steering Head Angle: 26.5 deg.
Wheelbase: 58.86 in.
Ground Clearance: 14.76 in.
Seat Height: 39.06 in.
Fuel Capacity: 7.5 liters/1.98 U.S. gallons
Claimed Dry Weight: 230.2 lbs.
MSRP: $8499

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