Engine architecture
Single throughout
Every KTM SMC ever made has used the LC4 single — KTM signature engine, originally air-cooled then liquid-cooled from 2008. Capacity has grown 654 → 693cc across 22 years; the architecture has never changed. One big piston, lots of torque, light weight.
Why this category exists
Track-day supermoto
Supermotos are dirt-bike chassis with road wheels and tyres — light (140-150kg), torquey, narrow, easy to flick. The KTM 690 SMC R is widely considered the purest big-single supermoto on sale. Hooligan tool, track-day weapon, twisty-road specialist.
Power gain
+14bhp
60bhp LC4 660 SMC → 74bhp 690 SMC R. 23% more horsepower from the bigger and liquid-cooled LC4 single. Modern bike makes power higher in the rev range — old bike was all bottom-end torque.
Weight is the cruiser tax inverted
Held under 150kg
147kg dry across all three generations. The supermoto promise is "stay light no matter what" and KTM has held the line. The 2026 bike has more power, more electronics, more displacement, but weighs the same as the 2006 original. That is engineering discipline.
Real cost change
−A$2.4k
LC4 660 SMC was A$13,600in 2006 (A$22,900today). 690 SMC R is A$20,500for 2026 — about 11% cheaper in real terms. KTM has held SMC pricing remarkably steady despite huge tech additions (cornering ABS, IMU, ride modes, TFT, quickshifter). 2026 brings a refreshed LC4 with new crankcase, clutch and stator covers, improved oil delivery, and a 4.2" TFT — held flat at the 2025 price.
Why supermotos are hard to sell
Niche category
Supermotos are a small market. KTM, Husqvarna and Aprilia are the only major manufacturers still building them. Reasons: small fuel tank, uncomfortable for distance, expensive consumables (fat sticky tyres die fast), and the riding style appeals to a small slice of riders. Honda, Yamaha, Suzuki have all left the category. KTM keeps making them because the brand is built on this kind of bike.
Cheapest way in
A$6.8k
A clean LC4 660 SMC from 2007-2010. The original — air-cooled LC4, kickstart on early models, characterful, slightly agricultural by modern standards. Probably the cheapest way to put a proper KTM supermoto in your garage. Service costs are low (single cylinder), but the LC4 motor needs careful maintenance to stay alive.
