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 |
