2006 KTM 125 SX / 250 SX

May. 01, 2006 By ORC STAFF
Refining the Orange Lineup
 
 

125 SX (photo at top)
Quite possibly the fastest bike in the 125 class, the SX 125 is light and its power-to-


250 SX
weight ratio has been the decisive argument in the 125 class for years. It has a re-vamped chassis and broadly usable rev range. Details like the adjustable CNC-machined triple clamp are normally available only on expensive factory bikes.

250 SX
The two stroke in the class, the 250 has power to burn over a broadly usable powerband. It's very light and fast and competes against the 450 four strokes in its class.

 
125 SX
250 SX
MSRP $5,398 $6,298
Engine   
Engine Type single cylinder, 2-stroke
Displacement 124.8 cc 249 cc
Bore/stroke 54/54.5mm
(2.13/2.15")
66.4/72
(2.61/2.83)
Compression ratio
-
-
Starter kick-starter
Transmission 6 gears 5 gears
Carburetor Keihin PWK 39 Keihin PWK 36 S AG
Power Valve Control TVC power valve
Lubrication mixture oil lubrication 1:40 mixture oil lubrication 1:60
Transmission lubrication Motorex Top Speed 15W50
Engine oil
-
-
Primary ratio 1.009027778 26:72
Final drive 13:50 13:48
Cooling liquid cooled
Clutch wet multi-disc clutch, operated hydraulically
Ignition Kokusan digital 2K-1
Chassis   
Frame central double-cradle-type 25 CrMo4
Subframe aluminum 7020
Handlebar Renthal aluminium Ø 28/22mm tapered Renthal Ø 28/22mm (1.10")
Front suspension WP-USD Ø 48mm (1.89")
Rear suspension WP-PDS shock absorber
Suspension travel front/rear 300/335mm (11.81/13.19")
Front/Rear brakes disc brakes 260/220mm
(10.24/8.66")
Front/rear rims 1.60 x 21"; 2.15 x 19"
Front/rear tires 80/100-21"; 100/90-19"
Chain 5/8 x 1/4"
Main silencer aluminum
Steering head angle 63° 63.5°
Wheelbase 1471±10mm (57.91±0.39") 1475±10mm (58.07±0.39")
Ground clearance (unloaded) 390mm (15.35") 385mm (15.16")
Seat height 925mm (36.42")
Fuel capacity approx. 7.5 litres (2 gal)
Weight (ready to race, no fuel) approx. 92.4 kg (203.7 lbs) approx. 97.7 kg (208 lbs)


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