hsr-benelli S-series Service Manual page 51

Valves and Valve Guide Inspection
The following procedure must be carried out on all valves and relative valve guides.
Check that values (A) and (B) are within the tolerance of the specific values.
If values (A) and (B) are not within the value limits, change the elements.
INTAKE VALVE DIAMETER LIMIT
A max. = 5.05 mm
B min. = 4.965 mm
EXHAUST DIMENSION LIMITS
A max. = 5.05 mm
B min. = 4.955 mm
Check condition of the surfaces of the valves.
Eliminate eventual carbon deposits.
If the surface is excessively ruined, change the element.
Check thickness (A) indicated in the figure.
VALVE THICKNESS VALUE LIMIT
A= 1,0 ÷ 1,3 mm
ver.2009_03 Page 51/215