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2011 KTM Dirt Bike Models Photo Gallery

The 2011 KTM 125 SX is the smallest in the motocross line.

Check out the latest Dirt Bike models from Austrian motorcycle manufacturer KTM for 2011.

The small-bore smoker is back again for all the light-handling, zippy fun. It too gets the new PDS chassis, two-part silencer.

For 2011, the 250 SX has the new PDS chassis with a revised airbox.

The quarter-liter machine is the other KTM dirt bike to receive fuel injection – opposite of the Japanese brands which have converted the 450 machines first.

The 2011 KTM 250 SX-F is kick start, but has been modified this year to allow for a conversion to e-start if desired using a PowerParts kit with starter, ignition cover, gears, battery and wiring.

The 350 SX-F uses a DOHC engine with four titanium valves with
Keihin engine management system and 42mm throttle body.

The kTM 350 SX-F is finally here. Fuel injection, electric start and a linkage shock top a long list of highlights.

All SX-F models also get the latest generation 48mm WP fork to pair with the new triple clamp from 2010. Settings on the closed-cartridge fork are tailored to match the chassis and new shock, but the fork is relatively unchanged.

Bore and stroke for the 350 are 88 x 57.5mm compared to 76 x 54.8mm (250) and 97 x 60.8mm (450).

KTM retains the chromoly frame, but have made changes which increase torsional rigidity and lessen longitudinal stiffness. The frames only differ between PDS and the new linkage shock in the mounting points.

The 349.5cc mill uses four titanium valves with a claimed rev limit of 13000 rpm.

The 2011 450 SX-F retains it 41mm Keihin carburetor – though who can argue after it won out 2010 450 Motocross Shootout against a slew of EFI machines.

Adding a linkage allows the shock shaft to move more quickly through its rising rate. This “high spring progression” is preferred for the increased loads associated with MX and SX.

The 2011 450 SX-F retains it 41mm Keihin carburetor – though who can argue after it won out 2010 450 Motocross Shootout against a slew of EFI machines.