3-20
Disassembling
Crankcase Half
1. Remove the crankshaft from the left crankcase
half.
KM721
2. Remove the balance shaft from the left crank-
case half.
KM722
Table of Contents
(Servicing Components)
NOTE: Critical engine/transmission specifica-
tions are located at the beginning of this section.
Servicing Top-Side Components .......................... 3-20
Valve Assembly ................................................. 3-20
Cylinder Head Assembly.................................... 3-22
Piston Assembly ............................................... 3-23
Cylinder Assembly ............................................. 3-25
Servicing Left-Side Components .......................... 3-26
Recoil Starter (Utility Model) .............................. 3-26
V-Belt Cover ....................................................... 3-29
Drive Pulley ........................................................ 3-29
Driven Pulley/Centrifugal Clutch Assembly........ 3-30
Servicing Center Crankcase Components ........... 3-33
Crankshaft Assembly ........................................ 3-33
Crank Balancer Shaft ......................................... 3-34
Servicing Right-Side Components ....................... 3-34
Transmission (DVX Model)................................. 3-34
Transmission (Utility Model) ............................... 3-36
Servicing Top-Side
Components
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
VALVE ASSEMBLY
When servicing valve assembly, inspect valve seats,
valve stems, valve faces, and valve stem ends for
pits, discoloration, or other signs of abnormal wear.
NOTE: Whenever a valve is out of tolerance, it
must be replaced.
Cleaning/Inspecting Camshaft
Holder
1. Remove the rocker arm shafts, rocker arms, and
stop plate from the camshaft holder.
AT THIS POINT
To service crankshaft assembly, see Servicing Cen-
ter Crankcase Components sub-section.
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Summary of Contents for DVX 250 2007
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