2006 KTM 125 SX / 250 SX

May. 01, 2006 By ORC STAFF

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Refining the Orange Lineup

2006 KTM
Motocross
50 SX	65 SX		85 SX		125 SX
250 SX	250 SX-F		450 SX		525 SX
Sport Minicycles
50 MINI ADVENTURE		50 SENIOR ADVENTURE		50 SX JUNIOR
Offroad EXC
400 EXC		450 EXC		525 EXC
Offroad Cross Country
200 XC	200 XC-W		250 XC		250 XC-W
300 XC	300 XC-W		450 XC		525 XC
Supermoto
450 SMR	560 SMR		625 SMC		950 SUPERMOTO
Adventure
950 ADVENTURE ORANGE		950 ADVENTURE BLACK		950 ADVENTURE S

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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2006 KTM 125 SX / 250 SX

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