KTM 250 SX-F 2006 Repair Manual

5-5
Crankshaft
If replacing the conrod bearing, make sure the crank pin is in the right
position. The holes in the crankshaft web
A must align with the holes
in the crank pin
B.
! CAUTION !
I
F YOU PRESS IN THE CRANK PIN IN THE WRONG POSITION
, THE CONROD BEARING
WILL NOT BE SUPPLIED WITH ENGINE OIL
, WHICH WILL RESULT IN DAMAGE TO THE
BEARINGS
.
If you will continue to use the crankshaft, check the crankshaft journal
for runout. Place the crankshaft on a roller stand or similar support and
use a dial gauge to check the crankshaft journal for runout.
Crankshaft journal runout: max. 0.15 mm
Check the conrod bearing for radial and axial clearance.
Radial clearance: max. 0.03 mm
Axial clearance: max. 0.8 mm
A
B

KTM 250 SX-F 2006 Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	249.5 cc
Compression Ratio	12.8:1
Cooling System	Liquid cooled
Starter	Kickstarter
Transmission	5-speed
Primary Drive	24:73
Final Drive	14:50
Clutch	Wet Multi-Disc Clutch, Hydraulically Operated
Bore x Stroke	76 mm x 54.8 mm
Fuel System	Keihin MX FCR 39 Carburetor
Ignition	Kokusan digital CDI
Lubrication	Pressure lubrication with 2 Eaton pumps