The 2012 KTM 350 SX-F is one of the most talked-about motocross bikes of its era, a machine that forced the industry to rethink what a mid-displacement dirt bike could do. Built for serious motocross riders who want the agility of a 250 with power that challenges a 450, this Austrian-engineered weapon arrived with a world championship title already under its belt. Powered by a liquid-cooled, DOHC single-cylinder engine with Keihin electronic fuel injection, the 2012 KTM 350 SX-F brought meaningful upgrades over its predecessor, including a revised chassis setup, improved clutch, and new Dunlop MX51 tires. It sits in the open motocross class and appeals strongly to intermediate and advanced riders looking for balance, precision, and race-proven performance.
2012 KTM 350 SX-F Price, Specs, & Review
Key Specifications
| Price | $8,499 MSRP (USA) |
| Engine | Single-cylinder, 4-stroke, DOHC, liquid-cooled |
| Displacement | 349.7 cc |
| Transmission | 5-speed manual, chain drive |
| Power | Approximately 47 hp at 12,200 rpm |
| Seat Height | 39.1 in (992 mm) |
| Curb Weight | 229 lb (103.9 kg) without fuel |
| Fuel Tank Capacity | 1.98 US gallons (7.5 liters) |
Image Gallery
2012 KTM 350 SX-F Top Features
- Keihin electronic fuel injection system
- DOHC four-titanium-valve cylinder head
- WP 48mm closed-cartridge USD fork
- WP monoshock rear linkage suspension
- Electric starter with kick start option
- Brembo hydraulic clutch actuation
- Optional map select engine switch
- Chrome-moly steel double-cradle frame
- Dunlop MX51 front and rear tires
- Lightweight aluminum subframe and swingarm
- Renthal aluminum handlebars
- Balancer shaft for vibration reduction
- Excel front and rear aluminum rims
2012 KTM 350 SX-F Review
The 2012 KTM 350 SX-F is not simply a bike you ride; it is a bike you feel. From the moment you swing a leg over its slim seat and fire up the Keihin EFI system, the engine comes alive with an eagerness that is immediately addictive. KTM had already proven the 350cc concept worked with a world championship in the bike’s debut season, and the 2012 revision sharpened the package in ways that mattered on the track. The chrome-moly steel frame is rigid yet communicative, striking a balance between feedback and composure that few motocross bikes manage at any displacement.
Styling on the 2012 SX-F is unmistakably KTM, with aggressive angular bodywork, slim radiator shrouds, and a seat profile that lets you shift your weight freely. The fit and finish is excellent for a purpose-built race machine. Nothing feels superfluous. Every panel, shroud, and bracket is designed to be light and functional. The bodywork ergonomics allow exceptional rider movement, which translates directly into faster lap times.
The DOHC single-cylinder engine is the heart of this machine, and it genuinely surprises you. Carbon-coated cam followers actuate four titanium valves with impressive efficiency, allowing the motor to spin freely toward 13,000 rpm. The 2012 model gained nearly two horsepower across the mid and top end compared to the 2011 version, pushing peak output to approximately 47 hp. That figure might seem modest next to a 450, but in the context of this bike’s 103.9 kg dry weight, it translates into a power-to-weight ratio that keeps the 350 SX-F seriously competitive.
The gearbox is a slick five-speed unit that slots into each ratio cleanly and quickly. The Brembo hydraulic clutch is progressive and light at the lever, which matters enormously when you are threading through whoops or making split-second decisions in a race. There is no vagueness, and the clutch holds up well under hard use. Combined with the optional map select switch, riders can tailor engine delivery for varying track conditions.
Handling is where the 2012 SX-F genuinely separates itself from heavier alternatives. The WP 48mm closed-cartridge upside-down fork delivers 300mm of plush, controlled front travel, while the WP monoshock at the rear offers 330mm of progressive stroke. The bike turns quickly and holds a line with confidence. It does not fight you mid-corner. That agility is a direct result of the revised 2012 geometry, which KTM tuned specifically for sharper directional response without sacrificing stability at speed.
Braking performance is strong across both ends. The 260mm front disc paired with a 220mm rear unit provides excellent stopping power with good feel and modulation. The system is predictable rather than aggressive, which helps less experienced riders build confidence. There is no ABS, as expected on a purpose-built motocross bike.
Practically speaking, the 2012 KTM 350 SX-F is a focused race tool. It has no underseat storage, no pillion provisions, and is not road-legal from the factory. Its 1.98-gallon tank is sized for a full moto rather than long-haul riding. City riding is not the intended use, and the aggressive ergonomics would feel tiring in stop-and-go traffic. But on a motocross track or off-road course, this bike is outstanding value and a genuinely rewarding machine to push hard.
2012 KTM 350 SX-F Performance, Top Speed, & Acceleration
The 2012 KTM 350 SX-F top speed sits in the range of approximately 85-90 mph under race conditions, with the engine pulling strongly through the rev range all the way to its 13,000 rpm ceiling. Peak power of roughly 47 hp arrives at around 12,200 rpm, making it one of the more high-revving motocross machines in its displacement class. That high-rpm character means the bike rewards riders who keep it in the power band.
Acceleration off the line is brisk and confident. While the 350 SX-F does not produce the violent bottom-end launch of a 450, its power delivery is linear and very easy to manage, which actually allows skilled riders to apply full throttle sooner out of corners. The 0-60 mph time is estimated at approximately 4.5 seconds in ideal race conditions. Overtaking on straights is effortless when the bike is in the right gear, and the five-speed gearbox keeps the engine in its sweet spot with minimal shifting effort.
2012 KTM 350 SX-F Competitor Comparison
The 2012 KTM 350 SX-F holds a unique position in the motocross segment. It outhandles the heavier Yamaha YZ450F and delivers superior agility for technical sections, while producing more usable power than the Honda CRF250R. However, the YZ450F still wins on raw torque and brute acceleration, and the Husqvarna FC 350 offers a very similar platform at a comparable price. Riders who prioritize balance, light weight, and smooth power delivery will find the KTM 350 SX-F the most rewarding choice of the three. Those who need maximum horsepower for wide-open tracks should consider the YZ450F instead.
| Feature | Yamaha YZ450F 2012 | Honda CRF450R 2012 | Husqvarna FC 350 2014 |
| Engine | 449cc Single, 4-stroke, DOHC | 449cc Single, 4-stroke, DOHC | 350cc Single, 4-stroke, DOHC |
| Power | ~55 hp | ~53 hp | ~48 hp |
| Top Speed | ~95 mph | ~92 mph | ~87 mph |
| Price in the US | $8,590 MSRP | $8,499 MSRP | Not sold in 2012 (est. ~$8,999 at launch) |
Who Should Buy the 2012 KTM 350 SX-F
The 2012 KTM 350 SX-F is built for intermediate to advanced motocross riders who want a competitive race machine without the physical demands of a full 450. If you are comfortable in the upper tier of amateur racing and want a bike that rewards precise, technical riding rather than brute-force riding, this machine is an excellent fit. Its manageable power delivery also makes it approachable for strong beginner-to-intermediate crossover riders who have outgrown a 250 but are not yet confident on a 450.
This bike is not suited for commuting, touring, or road use of any kind. Riders looking for a dual-sport or adventure machine should look elsewhere entirely. Beginners who are still developing throttle control may find the high-revving nature of the engine challenging to manage consistently. Anyone willing to invest time learning this bike’s character, however, will find it rewarding and fast at virtually any level of motocross competition.
2012 KTM 350 SX-F Specifications
Engine & Transmission
| Engine Type | Single-cylinder, 4-stroke, DOHC, liquid-cooled |
| Engine Displacement | 349.7 cc |
| No. of Cylinders | 1 |
| Fuel Type | Gasoline (Petrol) |
| Fuel Supply | Keihin EFI, 42mm throttle body |
| Cooling System | Liquid cooling |
| Bore | 88 mm |
| Stroke | 57.5 mm |
| Compression Ratio | 13.5:1 |
| Valves Per Cylinder | 4 (titanium) |
| Starting | Electric starter (kick start optional) |
| Ignition | Keihin EMS electronic ignition |
| Transmission | 5-speed manual |
| Clutch | Wet multi-disc, Brembo hydraulic actuation |
| Final Drive | Chain (5/8 x 1/4 in) |
Top Speed Performance, & Mileage
| Power | Approximately 47 hp at 12,200 rpm |
| Torque | Approximately 27 lb-ft (estimated) |
| Top Speed | Approximately 85-90 mph |
| Mileage | Not applicable (race/off-road use only) |
| 0-60 mph | Approximately 4.5 seconds (estimated) |
| 0-100 mph | Not applicable (off-road race use) |
Chassis & Suspension
| Body Type | Motocross / Off-road dirt bike |
| Chassis | Central double-cradle, 25CrMo4 chrome-moly steel |
| Front Suspension | WP USD closed-cartridge telescopic fork, 48mm |
| Rear Suspension | WP monoshock with aluminum swingarm and linkage |
| Front Wheel Travel | 300 mm (11.8 in) |
| Rear Wheel Travel | 330 mm (13.0 in) |
Brakes, Wheels, & Tires
| Front Brake | Hydraulic disc |
| Rear Brake | Hydraulic disc |
| Front Brake Diameter | 260 mm |
| Rear Brake Diameter | 220 mm |
| ABS | Not available |
| Front Wheel | Excel aluminum rim, 1.60 x 21 in |
| Rear Wheel | Excel aluminum rim, 2.15 x 19 in |
| Tire Type | Dunlop MX51 / GEOMAX off-road |
| Front Tire Size | 80/100-21 in (51M) |
| Rear Tire Size | 110/90-19 in (62M) |
Dimension & Capacity
| Wheelbase | 58.9 in (1,495 mm) |
| Length | Not specified by manufacturer |
| Width | Not specified by manufacturer |
| Height | Not specified by manufacturer |
| Seat Height | 39.1 in (992 mm) |
| Ground Clearance | 14.8 in (375 mm) |
| Curb Weight | 229 lb (103.9 kg) without fuel |
| Fuel Tank Capacity | 1.98 US gallons (7.5 liters) |
| Seating Capacity | 1 (rider only) |
Electricals & Lighting
| Battery Type | 12V lead-acid |
| Battery Capacity | 3 Ah |
| Headlight | Not fitted (off-road / race use) |
| Pilot Lights | Not fitted |
| Taillights | Not fitted |
| Turn Signals | Not fitted |
| Pass Light | Not fitted |
Instrument Console & Speedometer
| Console Type | Minimal race display (optional map select switch) |
| Speedometer | Not standard fitted |
| Tachometer | Not standard fitted |
| Odometer | Not fitted |
| Trip Meter | Not fitted |
| No. of Trip Meters | Not applicable |
| Fuel Gauge | Not fitted |
| Gear Shift Light | Not fitted |
| Gear Position Indicator | Not fitted |
| Low Fuel Indicator | Not fitted |
| Engine Temperature Indicator | Not fitted |
| Service Indicator | Not fitted |
Other Features
| Electric Starter | Yes (removable; kick start can be installed) |
| Engine kill Switch | Yes |
| Stand Alarm | Not fitted |
| Stepped Seat | No (single slim racing seat) |
| Pillion Seat | No |
| Pillion Grabrails | No |
| Pillion Footrest | No |
| Underseat Storage | No |
| Additional Features | Optional map select switch, Renthal aluminum handlebar, aluminum silencer, balancer shaft |
Frequently Asked Questions
What is the top speed of the 2012 KTM 350 SX-F?
The 2012 KTM 350 SX-F top speed is approximately 85 to 90 mph under race conditions. The engine revs freely toward 13,000 rpm, and while this is a motocross-oriented machine rather than a road bike, its power delivery at high rpm makes it genuinely fast on an open motocross track.
How much horsepower does the 2012 KTM 350 SX-F produce?
The 2012 KTM 350 SX-F produces approximately 47 horsepower at around 12,200 rpm. This represents a significant improvement over the 2011 model, with dyno testing from Motocross Action Magazine confirming nearly two additional horsepower in the key mid-to-top rev range.
What was the 2012 KTM 350 SX-F price in the USA?
The 2012 KTM 350 SX-F price in the USA was $8,499 MSRP. This placed it competitively alongside 450cc rivals from Yamaha and Honda, making the value proposition of its lighter weight and balanced performance very strong for race-focused buyers.
Is the 2012 KTM 350 SX-F good for beginners?
The 2012 KTM 350 SX-F is generally not recommended for true beginners. Its high-revving nature and race-focused ergonomics require a level of skill and confidence to get the most from. Strong intermediate riders who have already ridden 250cc motocross bikes will adapt well, but first-time riders should look at smaller displacement options first.
How does the 2012 KTM 350 SX-F compare to the Yamaha YZ450F?
The 2012 KTM 350 SX-F is lighter and more nimble than the Yamaha YZ450F, making it easier to ride fast in technical sections. The YZ450F produces more raw torque and is faster in a straight line, but the 350 SX-F’s balance and manageable power delivery give it an edge for riders who prioritize cornering speed and overall handling.
Does the 2012 KTM 350 SX-F have ABS?
No, the 2012 KTM 350 SX-F does not have ABS. As a purpose-built motocross racing machine, ABS was not available or expected in this segment in 2012. Braking is handled by a 260mm front hydraulic disc and a 220mm rear hydraulic disc, both of which offer strong feel and excellent modulation for off-road use.
Is the 2012 KTM 350 SX-F reliable for regular racing use?
Yes, when properly maintained according to KTM’s service schedule, the 2012 KTM 350 SX-F is considered reliable for regular amateur and semi-professional motocross racing. The Keihin EFI system eliminates many of the jetting headaches associated with carbureted competitors, and the clutch and gearbox are widely praised for durability under hard race conditions.
Ethan Collins is a passionate motorcycle journalist with a deep interest in sports bikes, cruisers, adventure motorcycles, and the latest industry trends. He loves comparing new launches, analyzing performance, and helping readers choose the right bike based on their riding style, budget, and needs.