Kymco MO KXR 250 Service Manual - chap 11 (carter e controalbero)

11.CRANKSCASE/CRANKSHAFT/

BALANCE SHAFT

11-0

Mongoose/KXR 250

11

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CRANKCASE/CRANKSHAFT/BALANCE SHAFT

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SERVICE INFORMATION -------------------------------------------- 11- 2

TROUBLESHOOTING ------------------------------------------------- 11- 2

CRANKCASE/CRANKSHAFT/BALANCE SHAFT----------------- 11- 3

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11.CRANKCASE/CRANKSHAFT/

BALANCE SHAFT

11-1

Mongoose/KXR 250

11.CRANKSCASE/CRANKSHAFT/

BALANCE SHAFT

11-2

Mongoose/KXR 250

SERVICE INFORMATION

GENERAL INSTRUCTIONS

• This section covers crankcase separation to service the crankshaft. The engine must be removed

for this operation.

• The following parts must be removed before separating the crankcase.

-Cylinder head (!Chapter 7)

-Cylinder/piston (!Chapter 8)

-Drive and driven pulleys (!Chapter 9)

-A.C. generator (!Chapter 16)

-Starter clutch (!Chapter 18)

-Oil pump (!Chapter 4)

SPECIFICATIONS

Item

Standard (mm)

Service Limit (mm)

Connecting rod big end side clearance

0.05_ 0.4

0.6

Crankshaft

Connecting rod big end radial clearance

0_ 0.008

0.05

Run outæ0.10

TORQUE VALUES

Crankcase bolt 0.8_ 1.2kgf-m
Cam chain tensioner slipper bolt 0.8_ 1.2kgf-m
Cam chain cover bolt 0.8_ 1.2kgf-m

TROUBLESHOOTING

Excessive engine noise
Excessive bearing play