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 |
