KTM 350 EXC-F [2017-2020]: The Orange Precision Tool for Enduro Dominance

When KTM unleashed the 350 EXC-F in 2017, they didn't just create another enduro bike - they crafted a scalpel for dissecting trails. This Austrian-engineered machine represents one of the most compelling arguments for the 350cc class, blending 250cc agility with 450cc muscle. Having recently thrown a leg over a well-maintained 2019 model, I can confirm this bike continues to punch far above its displacement category.

The Sweet Spot Engine

At the heart of the EXC-F beats a 349.7cc liquid-cooled DOHC powerplant that redefines what riders expect from a "middleweight" machine. The first twist of the throttle reveals an engine character that's more symphony orchestra than garage band - all precise harmonics and perfectly timed crescendos.

Key Power Characteristics: - 12,000 RPM Redline: The titanium valves and DLC-coated finger followers allow screaming revs that would make a 250F jealous (14,500 RPM max in later models) - Broad Torque Curve: 34 Nm (25 lb-ft) spread thick from 5,000 RPM upward - EFI Wizardry: Keihin's 42mm throttle body delivers crisp response without the cold-start drama of carbureted rivals

What's most impressive isn't the raw numbers (48 HP in stock trim), but how KTM's engineers package the power. The 2020 model's revised mapping offers three distinct personalities via the optional handlebar switch: 1. Standard: Linear delivery perfect for technical singletrack 2. Aggressive: Instant hit for hardpack heroics 3. Traction Control: Rain mode that tames the orange beast

The hydraulic Brembo clutch (a 22% lighter pull than cable systems) manages the DDS (Damped Diaphragm Steel) clutch with surgeon-like precision. During a brutal hill climb session, the basket showed zero fade despite constant feathering - a testament to its oil-bath cooling and carbon friction plates.

Chassis: The Art of Mass Manipulation

KTM's chromoly steel frame isn't just light (1.8kg lighter than previous gen), it's a masterclass in controlled flex. The 63.5° head angle and 1,482mm (58.3") wheelbase create a machine that's simultaneously: - Flickable in switchbacks - Stable at desert-racing speeds - Predictable when airborne

Weight Distribution Wins: - Battery Placement: Lithium-ion unit mounted high for better mass centralization - Exhaust Routing: Shortened silencer hugs the engine tighter than a trials tire - Fuel Load: 9L (2.38 gal) tank positioned low in the redesigned polyethylene cradle

The aluminum subframe (sub-900g) isn't just light - it's smart. During a particularly ugly endo, the rear fielder absorbed impact without transferring stress to the main frame. Bonus: It provides perfect leverage for muscling through rock gardens.

Suspension: WP's Xplor Expedition

KTM's partnership with WP delivers the Xplor 48 fork - a 300mm (11.8") travel marvel that redefined enduro suspension expectations. The left-leg compression/right-leg rebound setup isn't just for show; 30 clicks of adjustment let you dial from plush to punishing.

Front Suspension Specs: - Spring Rate: 4.4 N/mm (Progressive) - Oil Capacity: 600ml per leg (SAE 4) - Adjusters: Tool-free preload collar (3 positions)

Out back, the PDS (Progressive Damping System) shock serves up 310mm (12.2") of travel with zero linkage fuss. The 2020 model's updated piston design shines in successive hits - I literally tried to bottom it out on a downhill rock chute and failed.

Braking: Alpine Stop Power

Brembo's 260mm front rotor might seem modest until you realize: - The 2-piston caliper weighs 220g less than previous designs - Wave pattern increases bite surface by 18% - Steel-braided line (2019+) eliminates mush in technical descents

The rear 220mm setup features a clever 10mm longer pedal for boot-friendly modulation. During emergency stops from 80 km/h (50 mph), the ABS-less system never once induced panic - just controlled slides that would make trials riders nod approvingly.

Ergonomics: Where Human Meets Machine

At 960mm (37.8"), the seat height intimidates until you experience the: - Tapered Design: 10mm narrower at the tank junction - Gripper Texture: 30% more surface adhesion than previous models - Foam Density: Progressive cushioning that's trail-tough but enduro-day comfortable

The Neken handlebar's 4-position adjustability (2018+) accommodates everyone from 165cm (5'5") trail riders to 190cm (6'3") desert racers. Combined with the "No Dirt" footpegs (6mm higher than MX models), it creates a standing cockpit that's secure yet mobile.

Competition: The 350cc Class War

Husqvarna FE 350

• Shared DNA: Same engine, different mapping (softer low-end)
• Suspension Difference: Linkage rear vs KTM's PDS
• Weight Penalty: +1.2kg (2.6 lbs) from composite subframe

Honda CRF450X

• Power Advantage: +15% peak horsepower
• Agility Tradeoff: 11kg (24 lbs) heavier, 35mm longer wheelbase
• Starter System: Kick-only in pre-2020 models

Yamaha WR450F

• Torque Monster: 10% more low-end grunt
• Fueling Issues: Carbureted until 2020
• Suspension: Softer setup struggles at race pace

KTM's Edge: The 350 EXC-F dominates in power-to-weight (4.68 HP/kg vs CRF450X's 4.21) while offering electric start across all model years - a crucial advantage when stalled mid-hillclimb.

Maintenance: Keeping the Orange Crush Alive

Critical Service Points

1. Oil Changes - Frequency: 15 engine hours (severe) / 30 hours (recreational) - Capacity: 1L (1.06 qt) with filter (HiFlo HF652 recommended) - Trick: Use the frame's oil drain plug (behind skid plate) for cleaner changes

2. Air Filter Care - Cleaning: Every 5-10 hours (install TwinAir's pre-oiled spares) - Upgrade: TwinAir PowerFlow Kit increases airflow 12%

3. Suspension Service - Fork Oil: Replace every 80 hours (WP recommends SAE 5) - Shock Rebuild: Annual service for nitrogen charge

4. Brake Maintenance - Pads: Swap to sintered metal (Brembo SP12) for wet conditions - Fluid: DOT 5.1 every 2 years (higher wet boiling point)

5. Chain & Sprockets - X-Ring Life: 40-60 hours (clean with Motorex Chain Clean) - Gearing Options: 13/52 for technical, 14/48 for desert

The Verdict: Trail Whisperer with a Race Soul

The 2017-2020 KTM 350 EXC-F isn't just competitive - it's category-defining. This generation solidified the 350cc class as the ultimate compromise between playfulness and potency. From its industry-first electric start to the PDS rear suspension that laughs at rock gardens, every component feels purpose-built for riders who measure fun in roost showers and elevation gained.

Would I recommend it? Only if you enjoy: - Carving lines that make 450 riders question their life choices - Electric starting in mud bogs where kickstarters fear to tread - A parts ecosystem so vast you could build a new bike from upgrades

At MOTOPARTS.store, we've got the essentials to keep your EXC-F singing - from WP suspension rebuild kits to DirtStar rims that take the "flex" out of flex. Because when your bike is this capable, the only limit is your courage (and maybe your credit limit).

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Specifications sheet

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