KTM 640 SUPERMOTO (1998-2007) Review

Published: 24 November 2006

"A rough, tough bugger that's a capable commuter, trackday sleeper and wannabe stunt monkey"

KTM 640 LC4 Supermoto motorcycle review - Riding

"A rough, tough bugger that's a capable commuter, trackday sleeper and wannabe stunt monkey"

  • At a glance
  • 625cc  -  53 bhp
  • 42 mpg  -  80 miles range
  • High seat height (910mm)

Overall Rating 4 out of 5

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.

Ride Quality & Brakes 3 out of 5

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.

Engine 4 out of 5

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.

Build Quality & Reliability 4 out of 5

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.

Value & Running Costs 4 out of 5

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 of 17 – compare motorcycle insurance quotes now.

Equipment 3 out of 5

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.

Owners' Reviews

5 owners have reviewed their KTM 640 SUPERMOTO (1998-2007) and rated it in a number of areas. Read what they have to say and what they like and dislike about the bike below.

We’re currently improving the way this section works, which means we’ve had to suspend the submission of new owners’ reviews for a short period. Please check back soon.

Summary of Owners' Reviews
Overall Rating 3.8 out of 5
Ride Quality & Brakes 4.6 out of 5
Engine 3.8 out of 5
Build Quality & Reliability 3.6 out of 5
Value & Running Costs 3.6 out of 5
Equipment 3.2 out of 5
5 out of 5

Total unadulterated fun

29 November 2011 by mattski34

One word..........BRRRAAAARRRP!!! Read more

Overall Rating 5 out of 5
Ride Quality & Brakes 5 out of 5
Engine 5 out of 5
Build Quality & Reliability 5 out of 5
Value & Running Costs 4 out of 5
Equipment 5 out of 5
5 out of 5

PRIMAL BIKING AT ITS BEST

11 October 2008 by dparky

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... Read more 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.

Overall Rating 5 out of 5
Ride Quality & Brakes 5 out of 5
Engine 5 out of 5
Build Quality & Reliability 4 out of 5
Value & Running Costs 5 out of 5
Equipment 3 out of 5
4 out of 5

blaster

21 February 2008 by banzai boy

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. Read more

Overall Rating 4 out of 5
Ride Quality & Brakes 4 out of 5
Engine 4 out of 5
Build Quality & Reliability 4 out of 5
Value & Running Costs 4 out of 5
Equipment 3 out of 5
1 out of 5

2006 lc4

17 June 2007 by r-tune

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

Overall Rating 1 out of 5
Ride Quality & Brakes 4 out of 5
Engine 1 out of 5
Build Quality & Reliability 1 out of 5
Value & Running Costs 1 out of 5
Equipment 2 out of 5
4 out of 5

2006 KTM 640 LC4 Motard

22 May 2007 by Phantom_Mark

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... Read more 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

Overall Rating 4 out of 5
Ride Quality & Brakes 5 out of 5
Engine 4 out of 5
Build Quality & Reliability 4 out of 5
Value & Running Costs 4 out of 5
Equipment 3 out of 5
Read all 5 owners' reviews in full

Facts & Figures

Model info
Year introduced 1998
Year discontinued 2007
Original price -
Warranty term (when new) Two year unlimited mileage
Running costs
Insurance group 11 of 17
Annual road tax £80
Annual service cost -
Performance
Max power 53 bhp
Max torque 41 ft-lb
Top speed 110 mph
1/4-mile acceleration 14.7 secs
Average fuel consumption 42 mpg
Tank range 80 miles
Specification
Engine size 625cc
Engine type 4v single, 5 gears
Frame type Tubular steel cradle
Fuel capacity 9 litres
Seat height 910mm
Bike weight 149kg
Front suspension Preload, compression, rebound
Rear suspension Preload, compression, rebound
Front brake Single 320mm disc
Rear brake 220mm disc
Front tyre size 110/90 x 17
Rear tyre size 160/60 x 17

History & Versions

Model history

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

 

Other versions

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

Photo Gallery

  • KTM 640 LC4 Supermoto motorcycle review - Riding
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Engine
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Brakes
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Front view
  • KTM 640 LC4 Supermoto motorcycle review - Exhaust
  • KTM 640 LC4 Supermoto motorcycle review - Front view
  • KTM 640 LC4 Supermoto motorcycle review - Riding
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Riding
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Engine
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Brakes
  • KTM 640 LC4 Supermoto motorcycle review - Side view
  • KTM 640 LC4 Supermoto motorcycle review - Front view
  • KTM 640 LC4 Supermoto motorcycle review - Exhaust
  • KTM 640 LC4 Supermoto motorcycle review - Front view
  • KTM 640 LC4 Supermoto motorcycle review - Riding
  • KTM 640 LC4 Supermoto motorcycle review - Side view