Assembling The Piston And Connecting Rod Assembly; Assembling The Power Unit - Yamaha E115A Service Manual

Assembling the piston and connect-
ing rod assembly
1. Assemble the pistons 1, connecting
rods 2, needle bearings 3, washers 4,
piston pins 5, and new piston pin clips
6.
3
c
7
4
2
3
4
1
6
a
NOTE:
9 Face the embossed "YAMAHA" mark a on
the connecting rod in the same direction as
the "UP" mark b on the piston.
9 Use the small end bearing installer 7 to
install the needle bearings.
9 Always use new piston pin clips.
9 Be sure to align the piston pin clip end with
the piston pin slot c.
Small end bearing installer 7:
90890-06528
2. Install the 2nd piston ring 8 and top ring
9 onto the pistons.
61U5H11
6
b
6
5
61U50720
9
8
6G450670
cC
Do not scratch the pistons or break the
piston rings.
NOTE:
Install the piston rings with the recess for the
locating pin facing up toward the piston
crown.

Assembling the power unit

1. Set the crankshaft in the cylinder block.
a
NOTE:
9 Fit dowels 1 on the cylinder block into the
dowel holes 2 in the main bearings.
9 Align the seal ring end gaps a with the
crankcase center line.
Crankcase
1
2
3
2
4
1
5
6
61U50440
7
8
9
5-42