Yamaha XS650SG Specifications download pdf (Page 36)

G. Generator

1. Lock the crank rotation at the primary

drive gear.

2.

Reverse the generator removal sequence.

H. Oil

pump

Reverse the oil pump removal sequence.

I. Right-hand crankcase cover

While properly engaging oil pump gear, install

new case cover gasket and right-hand crank-

case cover. Tighten holding screws gradually

until proper torque is reached.

Crankcase cover holding screw torque:

1.0 m-kg (7 ft-lb)

J. Piston

1,

Position piston rings as shown.

NOTE:

1)

Make sure ends of oil ring expanders

are not overlapped.

2) Manufacturer’s marks or numbers

stamped on the rings are on the top

side of the rings. Coat pistons and rings

well with oil.

1.

T

OP

2.

2nd

3.

Expander

4.

spacer upper

5.

spacer lower

2. Install pistons on rods. The arrow on the

pistons must point to the front of the

engine.

NOTE:

Always install new piston pin clips.

K. Cylinder

and cylinder head

1.

2.

3.

4.

L.

1.

2.

Install the tensioner cushion onto crank-

case.

Install a new cylinder base gasket.

Install cylinder using special tool.

Install the cylinder head gasket and

cylinder head.

NOTE:

The assembly of the cylinder head is the

reverse of the disassembly procedure.

Install valve springs with tighter windings

(smaller pitch) down,

Camshaft

Rotate the piston to TDC.

Install the, chain onto the camshaft with

no slack in the cam chain on the front

portion

(opposite side

from the tensioner).

t

1. Center

2. No clearance

3.

Position the groove in the left side of the

cam sprocket so that it lines up with the

sprocket centers.

ii!

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