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KTM 640 LC4 Supermoto motorcycle review - Riding

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KTM 640 LC4 Supermoto (1998-2007)

Detail	Value
Used price range	View KTM 640 SUPERMOTO bikes for sale to see current asking prices
Engine size	625cc
Power	53bhp
Top speed	110mph
Insurance group	11

	MCN ratings	Owners' ratings
Overall
Engine
Ride & Handling
Equipment
Quality & Reliability
Value

MCN overall verdict

The KTM LC4 640 is KTM’s popular supermoto stalwart – a rough, tough bugger that’s a capable commuter, trackday sleeper and friend to the wannabe stunt monkey. It sits on the civilized side of the LC4 family, benefiting from an anti-vibe damper, and an electric start to complement the kicker. Like all supermotos it’s as cheap as chips, geared for giggles and ready to rumble.

MCN rating
Owners' rating

This KTM 640 LC4 Supermoto's liquid-cooled, SOHC single-cylinder motor has been in KTMs for over a decade, and in the 640 it’s definitely as its most civilised. But if you’re new to the world of supermoto you’ll probably think it rough and vibey. They’re all like that, Sir. Unlike the spunkier SMC range, which flat-slide carbs, the 640 gets a 40mm CV item for a more user-friendly response, especially around town.

MCN rating
Owners' rating

Providing it’s not still sitting on the dreadful Pirelli MT60 tyres it comes with the KTM 640 LC4 Supermoto handles sharply. The fully-adjustable WP suspension and four-piston Brembo brakes mean confident stopping is just a two-finger tug away. The seat is narrow to let you climb over the bike for faster cornering, but you’ll be thankful for the small tank and the chance to get off after just 70-odd miles.

MCN rating
Owners' rating

Apart from top names like Brembo and WP which adorn the stock machine the aftermarket offers a virtually unlimited opportunity to screw every last ounce of power from your KTM 640 LC4 Supermoto. A rear wheel dyno figure of 60bhp is well within reach.

MCN rating
Owners' rating

The KTM 640 LC4 motor is extremely reliable, providing it’s serviced regularly. Every 3000 miles there are two oil filters to change, but that’s a 30-minute job. Change the oil, too – that takes about another 20 minutes, but those chores will keep the motor perkier for much longer. Adjusting the valve clearances is easy thanks to a simple screw and nut arrangement. Keep the 640 away from salted roads – or else it corrodes like hell.

MCN rating
Owners' rating

The KTM 640 LC4 Supermoto is very good to buy, rubbish to sell. Supermotos are a poor monetary investment. Find a KTM 640 Supermoto for sale.

Insurance group: 11

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1998: Model released.
2005: Gets a twin pipe exhaust.
2007: KTM 640 LC4 Supermoto deleted.

KTM 660 SMC: No e-start, vibes aplenty, huge power, lighter weight, much shorter service intervals. Huge fun.

Specifications

Top speed	110mph
1/4-mile acceleration	14.7 secs
Power	53bhp
Torque	41ftlb
Weight	149kg
Seat height	910mm
Fuel capacity	9 litres
Average fuel consumption	42mpg
Tank range	80 miles
Insurance group	11

Engine size	625cc
Engine specification	4v single, 5 gears
Frame	Tubular steel cradle
Front suspension adjustment	Preload, compression, rebound
Rear suspension adjustment	Preload, compression, rebound
Front brakes	Single 320mm disc
Rear brake	220mm disc
Front tyre size	110/90 x 17
Rear tyre size	160/60 x 17

See all KTM 640 SUPERMOTO motorcycles for sale

KTM
640 SUPERMOTO

9900 miles

£2,800

Owners' Overall Rating (5 reviews)

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Total unadulterated fun

mattski34

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One word..........BRRRAAAARRRP!!!

29 November 2011
PRIMAL BIKING AT ITS BEST

dparky

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I have wanted one of these for a couple of years now, and now that I finally got one I have to say I am not in the least bit disappointed. Incredible road holding, top gear roll on from 60 to 90 is a rush of grunt that bikes 3 times the cost would be proud of. Keep it serviced with fresh oil and filters, wash it like its your baby and it repays you with grin factor a-plenty. The seat is a razor blade, but a comfort version is available for peanuts, as is the rest of the parts and accessories for these bikes, so turning it into a comfortable mode of transport is easy. Think of it as a bare bones, no un-nessessary clutter of a bike and enjoy biking at its most primal.

11 October 2008
blaster

banzai boy

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I bought the 2006 LC4 from Premier in Didcot, aftern a road test i had to have it.So easy to ride, loads of low end grunt and fun B road handing,Ilove the point and squirt fun & instant overtaking power.The bike is a HOOT.

21 February 2008
2006 lc4

r-tune

Average rating

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Poor engine reliability for an engine which is supposed to be bullet proof.

17 June 2007
2006 KTM 640 LC4 Motard

Phantom_Mark

Sleaford , UK

Average rating

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Everything as said in this review. I bought mine from a main dealer in the midlands ( Gear4 - Market Deeping ) second hand, 1 owner from new FSH and 1700 Miles. My machine has the aftermarket Akropovic titaniums and airbox mod, jetted to suit. The only real negatives I would say about this bike are that the seat is rock hard, really sore ass after a day out and only 200 ish miles. Fuel tank is tiny, 100 miles to reserve, and the rideability around town is terrible sub 20mph in your typical urban traffic, very jerky, hard to be smooth. Aside from these gripes the handling and performance is just breathtaking to be honest, my last bike was a FZR1000 however :D

22 May 2007