CF MOTO CF500-5B 2009, Руководство по обслуживанию, Страница: 118 / 272

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6 Eng i n e R e mo v a l , I n s p ec ti on & I n s t a l l a ti on
6
Valve Spring
Valve Spring keeps valve and valve seat tight.
Weakened spring results in reduced engine power
output and chattering noise from valve mechanism.
" Measure the spring free length.
Spring free length out of range: -- Replace
" Measure the force to compress the spring to the
specified length.
Valve spring tension out of range:
---
Replace
Service Limit: (IN/EX)
182N-210N/31.5mm
Tool: Spring Scale.
" Measure valve spring incline.
Spring incline out of range:
--
Replace
Valve Spring Incline Limit: 2.5 o /1.7mm
! !
Assembly of Cylinder Head
Service Limit: 38.8mm
Tool
: Vernier Caliper.
" Install each valve spring seat;
" Apply moly oil to valve stem seal and fit into
position.
M a t e ri a l : Mo l y o i l
Note: Do not reuse the valve stem seal.
" Insert the valves, with stems coated with moly oil
all around.
Note: When inserting the valve, be careful not to
damage the lip of the stem seal.