Yamaha 250GETO Service Manual page 125

NOTE:
9 Fit dowels 1 on the cylinder block into the
dowel holes 2 in the main bearings.
9 Align the projection 3 and the projection 4
of the roller bearing with the groove in the
cylinder block.
9 Align the seal ring end gaps a with the
cylinder center line.
2. Install the pistons into the cylinders with
the "UP" mark on the piston crown facing
towards the flywheel magnet.
6S35H11
NOTE:
9 Apply engine oil to the pistons and piston
rings before installation.
9 Be sure to install the piston and connecting
rod assemblies into the corresponding
cylinders according to the marks b made
during disassembly. Also, be sure to install
the assemblies with an "S" mark on the star-
board side, and the assemblies with a "P"
mark on the port side.
3. Install the connecting rod bearings and
connecting rod caps onto the connecting
rods, and then tighten the connecting rod
bolts 6 to the specified torques in five
stages.
6S350430
b
c
NOTE:
9 Align the identification numbers c on the
6S350440
connecting rod caps and connecting rods,
which you made during disassembly.
9 Apply engine oil to the connecting rod bear-
ings, connecting rod caps, and connecting
rod bolts before installation.
6S350450
Piston slider 5:
90890-06530
Connecting rod bolt 6:
1st: 19 N·m (1.9 kgf·m, 14.0 ft·lb)
2nd: 36 N·m (3.6 kgf·m, 26.6 ft·lb)
3rd: Loosen completely
4th: 19 N·m (1.9 kgf·m, 14.0 ft·lb)
5th: 36 N·m (3.6 kgf·m, 26.6 ft·lb)
Crankcase
1
2
3
4
6
5
6
6G450710
7
8
9
5-38