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2019 · Supermoto · Buyer's Guide
One Cylinder, Zero Mercy
The 690 SMC R takes the big-bore street supermoto idea and sharpens it to a point. The 692 cc single makes 77 hp and 54 lb-ft, and it pulls cleanly from low in the rev range instead of bogging the way most thumpers do. Ride-by-wire fueling, ride modes, traction control and a quickshifter now come standard, so the wildness arrives with electronics you can actually lean on. Light steel-trellis chassis, fully adjustable WP suspension, genuine lean clearance to spare. This is KTM's orange attack distilled down to one cylinder and not much weight.
On the road it rewards a rider who stays busy: weighting the pegs, throwing it side to side, driving the line instead of riding along. It ages well, too, with low running costs and a deep aftermarket if you want to make it your own. The honest caveats are real. The 35.0 in seat shuts out shorter riders, so sit on one before you sign anything. There's a safety recall on the clutch slave cylinder for 2018–2020 bikes, plus a handful of LC4 niggles worth checking on any used example. Buy with your eyes open and it delivers.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 77 hp (57 kW) |
|---|---|
| Torque | 54 lb-ft (73 Nm) |
| Displacement | 692 cc |
| Engine | Single-cylinder |
| Bore × stroke | 105 × 80 mm |
| Compression | 12.7:1 |
| Cooling | Liquid-cooled |
| Fuel system | EFI, ride-by-wire |
| Gearbox | 6-speed |
| Final drive | Chain |
| Frame | Steel trellis |
| Fork | Upside-down (USD) |
| Front brake | 320 mm |
| Rear brake | 240 mm |
| Front tire | 120/70-17 |
| Rear tire | 160/60-17 |
| Wheelbase | 58.1 in (1475 mm) |
| Ground clearance | 9.4 in (238 mm) |
| Front travel | 8.5 in (215 mm) |
| Rear travel | 9.4 in (240 mm) |
| Seat height | 35.0 in (890 mm) |
| Fuel capacity | 3.5 gal (13.2 L) |
Equipment check
Chassis
Drivetrain
Safety
Swing a leg over and the height registers immediately; at 35.0 in this is a tall, narrow machine that wants a confident rider. Thumb the starter and the single barks with real character, a hard mechanical voice that never fades into background drone. The bars are wide and the whole bike feels tiny underneath you, so you ride it with your body, shifting hips and loading pegs through every turn. It looks radical parked, then turns friendly once you're moving, faster and more approachable than the styling threatens. The Continental SM2 rubber backs you up almost from cold, letting you load the front earlier than you'd dare on most bikes. Under all of it there's chassis movement from the long-travel suspension, lively and alive, quietly asking you to trust it.
My own 0–100 score for this bike against the class, area by area — the marker on each bar is the class average.
Aim it and it's already there. Nothing sits between my input and the front wheel, and the faster I chain quick lefts and rights, the more the geometry seems to feed on it. The SM2 rubber backs that up, gripping before it carries any heat and meshing with the chassis on track so cleanly I stopped thinking about it. The honest flaw is the entry. All that suspension travel keeps the bike busy beneath you, and that jumpiness on the way into a corner never cleaned up, however I set things.
The brakes are the most finished part of the bike for me. I could haul it down hard with the machine already laid over and the front never protested, no shudder, no sense it was about to let go. Feedback through the lever is clear enough that I set my speed by feel instead of guessing where the limit sat, which is exactly what trail-braking asks for. Switch the ABS off for track work and the full bite of the front opens up. Real composure under load, and that's rarer than it should be.
Big singles usually punish you for asking too early, and this one just doesn't. I could lug it in first or grab a gear too many and there was still genuine drive waiting under the throttle, no flat patch through the middle and no hesitation when I leaned on it down low. The way the power tracks my wrist rather than arriving in a lump is what sets it apart. From one cylinder this size, that kind of even delivery is genuinely uncommon, and it lets me stop micromanaging the throttle and ride.
This is the part I never get tired of. The bike looks like it'll fight you, all hard edges and menace at a standstill, then you ride it and the speed simply shows up without the struggle the styling advertises. I made better time, and spent far less effort doing it, than anything that aggressive has any right to allow. That distance between how confrontational it seems parked and how willing it is once you're rolling is the whole appeal for me.
Comfort here isn't about padding. The bike is built for a rider who's always working, loading the pegs, sliding hip to hip, trimming the line in the middle of a corner, and the bars are wide enough to hand me real leverage for all of it. With so little weight under me, that constant repositioning stayed easy instead of wearing me down over a session. The one wall is the saddle. It sits tall and doesn't bend for a shorter inseam, so get on one in person first.
Clutch slave cylinder failure
The bellow-style gasket can be damaged during assembly, leading to clutch failure and inability to disengage. KTM issued a safety recall (NHTSA 21V-792) for the affected 2018–2020 models.
Rocker arm bearing wear
Premature wear of the rocker arm bearings can lead to engine noise and potential damage. Well-known in the LC4 platform, though incidence on the updated 2019+ engine is unclear.
Cam sprocket bolts requiring Loctite
Some 2019 models had a service action for cam sprocket bolts that could loosen; a recall/dealer fix applied Loctite. Not an official NHTSA safety recall.
Fuel pump / filter issues
Faulty fuel pumps or clogged filters can cause stalling, hesitation, or poor starting. Related to the fuel system common across LC4 models.
Electrical gremlins
Weak battery, faulty wiring, or corroded connections can lead to intermittent starting problems or electrical failures. More common on earlier models but still reported.
Counter shaft seal leak
Premature seal leakage at the output shaft, sometimes occurring within the first few rides. Reported on some 2019 examples.
Where this KTM 690 SMC R pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Seat height
Forget spec-sheet bragging. Here's who the 690 SMC R is actually built for.
If your weekends mean Angeles Crest and tight canyon work, this is your tool. It flicks instantly, brakes deep, and rewards precise, aggressive riding. Just know the tall seat asks for a confident reach.
Made for Angeles Crest Highway · Coronado Trail / US 191 · Highway 1 / Big Sur
Tail of the Dragon and Blue Ridge are exactly its element. Light, sharp, and built for skill over speed, it lets you work the line corner after corner. Road pace exposes some entry liveliness you'll learn to trust.
Made for Back of the Dragon · Blue Ridge Parkway · Cherohala Skyway
For Hill Country backroads it's a riot, with low running costs to match. The catch is range and comfort: a 3.5 gal tank and a tall, hard-edged seat make it a sport play, not a long-haul cruiser.
Made for Austin / Texas Hill Country · Twisted Sisters · Austin / Handbuilt Motorcycle Show