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Second-hand advice: KTM Duke
Second-hand advice: KTM
KTM Duke
Off-the-shelf and yet extremely individual – the KTM single-cylinder street sweeper proves impressively that this contradiction works. However, the heavy fun device has its pitfalls.
Thorsten Dentges
05/27/2010
The duke, the duke? Anyway, maybe best “the duke”, because the extroverted KTM comes across as something from another world. An indulgent world full of fun. The risk with the Duke (let’s stick with the “they”, The Duke) to go beyond your limits, however, is big. She beguiles with her appearance, that was the case with the first version from 1994. The cheeky design, daring for a series machine at the time, hid the enduro technology, which was initially very down-to-earth. 50 PS even hard-nosed drivers knocked softly on the narrow seat at some point. And brisk kicking off (first two years of construction) is also not for comfort people, so that today this model as a second-hand bike only appeals to hardliners.
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The Duke II from 2002, on the other hand, is more civilized with its 54 hp and is much more in demand from second hand. Similar to its ducal predecessor, it ennobled itself straight away to a design piece with noble ingredients: large disc brakes, fine fork, light wheels. Only a little over three hundredweight ready to drive, so even savvy super athletes can easily be tricked into narrow terrain. However, sooner or later too many wild rides lead to a heart attack in a high-pulse single-cylinder. And although the third and newest Duke generation (from 2008) deserves the crown when it comes to stability, prospective buyers shouldn’t expect the longevity of a good touring motorcycle and instead bring a good deal of irrationality with them. Duke remains Duke. That, that, that – why, why, why? Everything is self-explanatory. After the first ignition cycle.
Tests in MOTORCYCLE:
620er: 9/1994 (FB), 12/1994 (T), 12/1997 (VT), 640er: 16/1999 (VT), 4/2001 (VT), 17/2001 (VT), 2/2002 ( VT), 25/2002 (VT), 13/2005 (VT), 690er: 4/2008 (FB), 6/2008 (TT), 7/2010 (T, model R)
FB = driving report, T = test, TT = top test, VT = comparison test
Repeat orders by phone 0711 / 182-1229
Internet:
Fansites: www.dukecity.de, www.ktmforum.eu
Second-hand offers: https://www.1000ps.de/gebrauchte-motorraeder (620er), /bike3177.htm (640er), /bike3214.htm (690er), /bike4490.htm (R)
sightseeing
Run-in rocker arm rollers, crankshaft damage, worn gearbox input bearings, defective fork seals – defects that are not uncommon in older (built in 2002 and before), heavily used copies. Mostly the previous owner or owners are to blame: Full throttle in city traffic with a cold engine, wheelie ecstasy and laziness with regular maintenance and oil level checks leave their mark. Technical laypeople should therefore definitely have an expert do the test drive at the on-site appointment, who can interpret mechanical noises or even leave the check to a specialist workshop. In the case of private offers in particular, it is important to have a complete workshop history documented. Since many Dukes have also been given more power by means of carburetor kits and retrofit silencers (favorite: Akrapovic) are just as popular, it is advisable to check the vehicle documents for correct entries of the add-on parts and to take a look at the test marks – be careful if these are not available are!
Facelift
Used Dukes often go from hand to friend, so trading is primarily a private matter. The basis for negotiations starts at around 2000 euros, but these machines are not infrequently tinkered with conversions with a questionable history or specimens with minor defects. Very few used Dukes have more than 20,000 kilometers on the clock, but the number of interested parties who want to invest more than 6,000 euros is even lower. Professional dealers tend to be more reluctant to trade-in models that are clearly used, but traders occasionally have older Duke IIs or well-maintained ones “Great Dukes” from 2500 euros in the program. If a warranty is important to you as a buyer, you will most likely find it at the authorized dealer, who also sometimes have cheap previous year’s models around 1,000 euros below the new price or as good as new demonstrators from just over 7,000 euros.
Availability on the market: medium high
| Price level in euros |
Years of construction | Mileage |
| Low 1700-2700 | 1994-1998 | 20000-50000 | Medium 2800-3900 | 1998-2005 | 7500-20000 |
| High 4000-6900 | 2004-2008 | up to 7500 |
| Models | in program |
Approvals | 620/640/690 | from 1994 | around 4000 |
Technical specifications
archive
Filigree rims, elegantly appealing upside-down fork and firmly gripping brake with 320 mm disc.
Engine:
Water-cooled single-cylinder four-stroke engine, four valves, wet sump lubrication, carburetor, no exhaust gas cleaning, mechanically operated multi-disc oil bath clutch, five-speed gearbox, O-ring chain.
Bore x stroke 101 x 78 mm
Displacement 625 cc
rated capacity 40 kW (54 PS) at 7300 rpm
Max. Torque 58 Nm at 5500 rpm
Landing gear:
Single-loop frame made of steel, upside-down fork, adjustable rebound and compression damping, two-arm swing arm made of aluminum, central spring strut with lever system, adjustable spring base, rebound and compression damping, front and rear disc brakes.
Cast aluminum wheels 3.50 x 17; 4.25 x 17
Tires 120 / 70-17, 160 / 60-17
Mass and weight:
Wheelbase 1460 mm, steering head angle 64.2 degrees, caster 109 mm, seat height * 900 mm, weight with a full tank * 161 kg, payload * 189 kg, tank capacity / reserve 12 / 1.8 liters.
Measurements (MOTORRAD 2/2002):
Top speed 179 km / h
acceleration 0-100 km / h 4.2 sec
Draft 60-100 km / h 5.1 sec
consumption 4.7 l / 100 km (country road), 5.5 l / 100 km (at 130 km / h), super
* MOTORCYCLE measurements
Facelift
archive
The version of the KTM Duke from 2002.
1994 The Duke 620 “First edition” comes to Germany with a kick starter and manual decompression lever. Performance variants: 31 and 50 hp. Price: 13500 marks (6902 euros). A 400 version is also available in Austria.
1996 Duke 620 E with electric starter (in addition to the kick starter), modifications to the engine (new housing, two oil pumps). Price: 15290 marks (7818 euros).
1998 the “Last Edition” the 620 (built 400 times in total) already has the new LC4 single-cylinder engine with 625 cm3 displacement and balancer shaft. Performance variants: 34 and 54 hp. Price: 15,880 marks (8,119 euros).
1999 completely new model Duke II 640 with the new LC4 engine (see “Last Edition” 1998) and a heavily revised design. Price: 8580 euros.
2003 new, so-called high-flow cylinder head with larger valves; lighter rims and new control unit, hydraulic instead of mechanically operated clutch. Price: 8650 euros.
2004 Secondary air system to comply with the Euro 2 standard, new connecting rod. Price: 8650 euros.
2007 640 Duke II Last Edition as a special edition limited to 370 pieces in orange with orange rims Price: 8923 euros.
2008 Market launch of the third, current model generation, the 690 Duke, with a completely new LC4 engine (654 cm3, 34 or 65 hp), a new tubular space frame and design. Price: 8995 euros.
2010 Model Duke R with 34 or 70 hp engine with 690 cm3. Price: 9495 euros.
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