CHAPTER 3B ENGINE 50cc/80cc ATV SERVICE MANUAL09.0
CHAPTER 3B ENGINE PAGE 3B - 41 -
3.6.1 Important points
·The chapter gives instructions related to the crankshaft and dismantling the crankcase Before striking,
it’s necessary to take the engine apart.
·Complete the following work before taking the crankcase apart. Remove the following.
—The cylinder head
—The cylinder & the piston
—The driving plate & the driven plate
—AC generator
—The carburetor & the air filter
—The starting motor
—The oil pump
Tech Criteria Unit: mm
Item
Normal Size Max Service
Allowance
The clearance of the both sides of the big end
of the connecting rod
0.10—0.35
0.55
The clearance of X — Y Directions of the
journal of the big end of the connecting rod
0—0.008
0.05
Crankshaft
Run out 0.10
Torque:
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