HUSABERG FE 450 AUS, Repair Manual

Page: 129 / 285

30/ENGINE - WORK ON THE INDIVIDUAL PARTS
127
19.32
Checking the valves
Info
The valve shaft is hard-chrome plated; wear generally appears at the valve guide.
200193-10
–
Check the valve plate for run-out.
Valve
Run-out at valve plate
≤
0.05 mm (
≤
0.002 in)
» If the measured value does not meet specifications:
–
Change the valve.
0 0 A A
400373-10
–
Check sealing seat

on the valve.
Valve
Intake sealing seat width 1.50 mm (0.0591 in)
Valve
Exhaust sealing seat width 2.00 mm (0.0787 in)
» If the sealing seat is not centered on the valve seat or deviates from the specifi-
cation:
–
Rework the valve seat.
19.33
Checking the valve springs
200190-10
–
Check the valve springs for breakage and wear (visual check).
» If the valve spring is broken or worn:
–
Change the valve spring.
–
Measure the length of the valve springs.
Valve spring
Intake minimum length (without
valve spring seat) 46.5 mm (1.831 in)
Valve spring
Exhaust minimum length (without
valve spring seat) 43.0 mm (1.693 in)
» If the measured value does not meet specifications:
–
Change the valve spring.
19.34
Checking the valve spring seat
500173-01
–
Check the valve spring seat for breakage and wear (visual check).
» If the valve spring seat is broken or worn:
–
Change the valve spring seat.
–
Measure the thickness of the valve spring seat.
Valve spring seat - thickness 0.9… 1.0 mm (0.035… 0.039 in)
» If the measured value does not meet specifications:
–
Change the valve spring seat.