Cylinder And Piston Combination; Piston Ring Inspection - Yamaha WaveRunner Gp1200R Wartungshandbuch

POWR
PISTONS
4. Calculate:
Piston-to-cylinder clearance
Out of specification → Replace the
piston, piston rings and cylinder as a
set.
PISTON
CLEARANCE
Piston-to-cylinder clearance:
0.100 ~ 0.105 mm
(0.0039 ~ 0.0041 in)

Cylinder and piston combination

Select the appropriate piston to match the
cylinder size by the table as follows.
Cylinder size
indication a
0 ~ 5
6 ~ 10
11 ~ 15
16 ~ 18
NOTE:
New cylinder bore size = 80.000 + a/1,000
Example: a = 12 → 80.012 mm.

Piston ring inspection

1. Measure:
Side clearance
(with a thickness gauge 1)
Out of specification → Replace the
piston and piston rings as a set.
Side clearance:
0.03 ~ 0.05 mm (0.001 ~ 0.002 in)
5-28
CYLINDER PISTON
= –
BORE DIAMETER
Piston color mark
Red
Orange
Green
Purple
E