KTM 400 EXC Owner's Manual page 27

PERIODIC MAINTENANCE
250/400/450/525 SX/XC/EXC 2006
RECOMMENDED INSPECTIONS OR MAINTENANCE WORK BY THE AUTHORIZED KTM WORKSHOP FOR HOBBY USE
(ADDITIONAL ORDER FOR THE KTM WORKSHOP)
A 100 liter fuel consumption is equivalent to approx. 15 operating hours
Check the clutch disks for wear
Check the length of the clutch springs
Check the cylinder and piston for wear
Check the groove on the piston pin retainer for wear (visual check)
Check the camshaft for wear (visual check)
Replace the camshaft bearings
Check the length of the valve springs
Check the spring cap for wear
Check the eccentricity of the valve disk
Check the valve guides for wear
Check the radial clearance of the rocker arm rollers
Check the elongation of the timing chain
Check the chain tensioner tooting for damage (visual check)
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Check the eccentricity of the crankshaft journal
Replace the conrod bearings
Check piston pin bearing
Replace the balancer shaft bearings
Replace the crankshaft main bearings
Check the entire transmission including the roller and bearings for wear
Check the length of the bypass valve spring
Replace the glass-fiber yarn filling in the silencer (SX)
Replace the glass-fiber yarn filling in the silencer (Enduro)
Replace the sealing cup for the foot brake cylinder (SX)
Replace the sealing cup for the foot brake cylinder (Enduro)
Replace the throttle slide, jet needle and main jet holder (every 210 hours)
NOTE:
If the inspection establishes that permissible tolerances are exceeded, the respective components must be replaced.
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every every every
30 60 90
hours hours hours
200 400 600
liter liter liter