Motorcycle Types Adventure / Dual-Sport KTM 2011 Off-Road Bikes Arrive in June

KTM 2011 Off-Road Bikes Arrive in June

2011 Models

KTM introduces its 2011 off-road lineup to dealerships in June, meeting the anticipation created by the 350 SX-F thanks to a win by Jagermeister KTM rider Mike Alessi at the opening round of the Lucas Oil AMA Pro Motocross Championship at the Hangtown Classic.

While some may be been skeptical that a 350 can run with 450s, the 350 SX-F earned 4-1 moto finishes with Alessi aboard, placing him second overall. The 350 SX-F was also the first-ever 350cc cycle in the MX1 World Championship, where Antonio "Tony" Cairoli won the premier race.

The new-size four-stroke–recalling the early years of two-strokes in motocross when open bikes were often 351cc–was developed by ten-time MX World Champion Stefan Everts, with the goal offering the performance of a 450cc with the agility of a 250cc MX bike.

The 350 SX-F, along with every other SX-F model, features linked rear suspension system, rather than the linkage-less shock PDS suspension associated with KTM. The 2011 two-stroke (SX) models still retain PDS.

The 350 SX-F also features a Keihin fuel injection system with a 42mm throttle body and a Keihin engine management system, and an electric start, although the bike can be retrofitted with a kickstarter.

The 350 SX-F is one of six MX models for 2011: the SX (two-stroke) models, the 125 SX, the 150 SX and 250 SX, and the SX-F (four stroke) models, the 250 SX-F, the 350 SX-F and the 450 SX-F.

As for the SX-F models, the 250 and 350 have the new fuel injection, but the 450 retains the 41mm Keihin carburetor. All SX-F models also get 48mm WP fork up front.

Both the SX and SX-F models have redesigned, stiffer framework, with the only differences arriving from the PDS vs. the linked suspension mounting holes.

As for the two-stroke SX models, all will retain PDS suspension and Keihin carburetors. The 150 and 250 SX models also have the following upgrades:

> New cylinder with improved casting

> New exhaust pipe with increased wall thickness for more resistance against damage

> New radiator cap for better heat stability

> Entirely new KTM-patented triple-clamp design that includes a 22mm fixed off-set and overall design improvements for improved flex characteristics and optimal handling.

> Modified air box with a new shape that helps reduce dirt and water collection and new TwinAir filter

> New brake pads for more progressive feel

> New Renthal Diamond handgrips

The 150 SX transmission also received a reinforced 1st gear for durability, and the frame is redesigned with a steeper steering head angle for easier cornering and a better feeling in the front end.

2011 KTM 125 SX

Engine type

Single cylinder, 2-stroke

Displacement

124.8 cc

Bore x stroke

54 x 54.5 mm (2.13 x 2.15")

Starter

Kickstarter

Transmission

6 gears

Carburetor

Keihin PWK 38S AG

Control

Exhaust control

Lubrication

Mixture oil lubrication 1:40

Transmission oil

Motorex, SAE 15W50

Primary drive

23:73

Final drive

13:50

Cooling

Liquid cooling

Clutch

Wet multi-disc clutch, operated hydraulically

Ignition

Kokusan

Frame

Central double-cradle-type 25CrMo4

Subframe

Aluminum

Handlebar

Renthal, Aluminum Ø 28/22 mm (1.10/0.87")

Front suspension

WP USD Ø 48 mm (1.89")

Rear suspension

WP PDS shock absorber

Suspension travel front/rear

300/336 mm

Brakes, front/rear

Disc brakes 260/220 mm (10.24/8.66")

Rims, front/rear

1.60 x 21"; 2.15 x 19" Excel

Tires, front/rear

80/100-21"; 100/90-19"

Chain

5/8 x 1/4"

Main silencer

Aluminum

Steering head angle

63.5°

Wheel base

1480±10 mm

Ground clearance (unloaded)

385 mm

Seat height

992 mm

Tank capacity

approx. 7,5 liters

Weight (no fuel)

approx. 88.8 kg

2011 KTM 150 SX

Engine type

Single cylinder, 2-stroke

Displacement

143.6 cc

Bore x stroke

56 x 58.4 mm (2.20 x 2.30")

Starter

Kickstarter

Transmission

6 Gears

Carburetor

Keihin PWK 38S AG

Control

Exhaust control

Lubrication

Mixture oil lubrication 1:40

Transmission oil

Motorex, SAE 15W50

Primary drive

23:73

Final drive

14:50

Cooling

Liquid cooling

Clutch

Wet multi-disc clutch, operated hydraulically

Ignition

Kokusan

Frame

Central double-cradle-type 25CrMo4

Subframe

Aluminum

Handlebar

Renthal, Aluminum Ø 28/22 mm (1.10/0.87")

Front suspension

WP USD Ø 48 mm (1.89")

Rear suspension

WP PDS shock absorber

Suspension travel front/rear

300/336 mm

Brakes, front/rear

Disc brakes 260/220 mm (10.24/8.66")

Rims, front/rear

1,60 x 21"; 2,15 x 19" Excel

Tires, front/rear

80/100-21"; 100/90-19"

Chain

5/8 x 1/4"

Main silencer

Aluminum

Steering head angle

63.5°

Wheel base

1480±10 mm

Ground clearance (unloaded)

385 mm

Seat height

992 mm

Tank capacity

approx. 7,5 Liter

Weight (no fuel)

approx. 88.8 kg

2011 KTM 250 SX

Engine type

Single cylinder, 2-stroke

Displacement

249 cc

Bore x stroke

66.4 x 72 mm (2.61 x 2.83")

Starter

Kickstarter

Transmission

5 gears

Carburetor

Keihin PWK 36S AG

Control

TVC power valve

Lubrication

Mixture oil lubrication 1:60

Transmission oil

Motorex, SAE 15W50

Primary drive

26:72

Final drive

13:48

Cooling

Liquid cooling

Clutch

Wet multi-disc clutch, operated hydraulically

Ignition

Kokusan

Frame

Central double-cradle-type 25CrMo4

Subframe

Aluminum

Handlebar

Renthal, Aluminum Ø 28/22 mm (1.10/0.87")

Front suspension

WP USD Ø 48 mm (1.89")

Rear suspension

WP PDS shock absorber

Suspension travel front/rear

300/335 mm (11.81/13.19")

Brakes, front/rear

Disc brakes 260/220 mm (10.24/8.66")

Rims, front/rear

1.60 x 21"; 2.15 x 19" Excel

Tires, front/rear

80/100-21"; 110/90-19"

Chain

5/8 x 1/4"

Main silencer

Aluminum

Steering head angle

63.5°

Wheel base

1475±10 mm (58.07 ± 0.39")

Ground clearance (unloaded)

385 mm (15.16")

Seat height

985 mm (38.78")

Tank capacity

approx. 8 liters (2.11 gal)

Weight (no fuel)

approx. 95.4 kg (208 lbs)

2011 KTM 250 SX-F

Engine type

Single cylinder, 4-stroke

Displacement

248.6 cc

Bore x stroke

76 x 54.8 mm (2.99 x 2.16")

Compression ratio

13.2:1

Starter

Kickstarter

Transmission

6 gears

Carburetor

Keihin EFI, throttle body 42 mm

Control

4 V/DOHC with finger followers

Lubrication

Pressure lubrication with 2 oil pumps

Engine lubrication

Motorex, SAE 10W50

Primary drive

22:68

Final drive

13:48

Cooling

Liquid cooled

Clutch

Wet multi-disc clutch, operated hydraulically

Ignition

Keihin EMS

Frame

Central double-cradle-type 25CrMo4

Subframe

Aluminum

Handlebar

Renthal, Aluminum Ø 28/22 mm (1.10/0.87")

Front suspension

WP USD Ø 48 mm (1.89")

Rear suspension

WP-Monoshock with linkage

Suspension travel front/rear

300/330 mm

Brakes, front/rear

Disc brakes 260/220 mm (10.24/8.66")

Rims, front/rear

1.60 x 21"; 2.15 x 19" Excel

Tires, front/rear

80/100-21"; 100/90-19"

Chain

5/8 x 1/4"

Main silencer

Aluminum

Steering head angle

63.5°

Wheel base

1495±10 mm

Ground clearance (unloaded)

375 mm

Seat height

992 mm

Tank capacity

approx. 7.5 liters

Weight (no fuel)

approx. 99.9 kg

2011 KTM 350 SX-F

Engine type

Single cylinder, 4-stroke

Displacement

349.7 cc

Bore x stroke

88/57.5 mm

Compression ratio

13.5:1

Starter

Electric starter/12V 3 Ah

Transmission

5 gears

Carburetor

Keihin EFI, throttle body 42 mm

Control

4 V/DOHC with finger followers

Lubrication

Pressure lubrication with 2 oil pumps

Engine lubrication

Motorex, SAE 10W50

Primary drive

24:73

Final drive

14:50

Cooling

Liquid cooled

Clutch

Wet multi-disc clutch, operated hydraulically

Ignition

Keihin EMS

Frame

Central double-cradle-type 25CrMo4

Subframe

Aluminum

Handlebar

Renthal, Aluminum Ø 28/22 mm (1.10/0.87")

Front suspension

WP USD Ø 48 mm (1.89")

Rear suspension

WP-Monoshock with linkage

Suspension travel front/rear

300/330 mm

Brakes, front/rear

Disc brakes 260/220 mm (10.24/8.66")

Rims, front/rear

1.60 x 21"; 2.15 x 19" Excel

Tires, front/rear

80/100-21"; 110/90-19"

Chain

5/8 x 1/4"

Main silencer

Aluminum

Steering head angle

63.5°

Wheel base

1495±10 mm

Ground clearance (unloaded)

375 mm

Seat height

992 mm

Tank capacity

approx. 7.5 liters

Weight (no fuel)

approx. 103.9 kg

2011 KTM 450 SX-F

Engine type

Single cylinder, 4-stroke

Displacement

449.3 cc

Bore x stroke

97 x 60,8 mm (3.82 x 2.39")

Compression ratio

12.5:1

Starter

Electric starter/12V 3 Ah

Transmission

5 gears

Carburetor

Keihin FCR MX 41

Control

4 V/DOHC with finger followers

Lubrication

Pressure lubrication with 3 oil pumps

Engine lubrication

Motorex, SAE 10W50

Primary drive

29:74

Final drive

14:52

Cooling

Liquid cooling

Clutch

Wet multi-disc clutch, operated hydraulically

Ignition

Kokusan

Frame

Central double-cradle-type 25CrMo4

Subframe

Aluminum

Handlebar

Renthal, Aluminum Ø 28/22 mm

Front suspension

WP-USD Ø 48 mm (1.89")

Rear suspension

WP PDS shock absorber

Suspension travel front/rear

300/330 mm

Brakes, front/rear

Disc brakes 260/220 mm (10.24/8.66")

Rims, front/rear

1.6 x 21"; 2.15 x 19" Excel

Tires, front/rear

80/100-21"; 110/90-19"

Chain

5/8 x 1/4"

Main silencer

Aluminum

Steering head angle

63,5°

Wheel base

1495±10 mm

Ground clearance (unloaded)

371 mm

Seat height

992 mm

Tank capacity

approx. 7.5 liters

Weight (no fuel)

approx. 106.9 kg

Ron Lieback
Ron Lieback
One of the few moto journalists based on the East Coast, Ron Lieback joined the motorcycle industry as a freelancer in 2007, and is currently Online Editor at Ultimate Motorcycling. He is also the author of "365 to Vision: Modern Writer's Guide (How to Produce More Quality Writing in Less Time).

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