Piston; Piston Diameter; Piston Ring Groove Width; Piston Ring Thickness - Suzuki VZ800 Service Manual

PISTON

PISTON DIAMETER

Using a micrometer, measure the piston outside diameter at the
place shown in Fig. If the measurement is less than the limit,
replace the piston.
 Piston diameter
Service Limit: 82.880 mm (3.2630 in)
 09900-20204: Micrometer (75 – 100 mm)
PISTON-TO-CYLINDER CLEARANCE
As a result of the aforesaid measurement, if the piston to cylin-
der clearance exceeds the following limit, overhaul the cylinder
and use an oversize piston, or replace both cylinder and piston.
 Piston to cylinder clearance
Service Limit: 0.120 mm (0.0047 in)
Piston oversize: 0.5, 1.0 mm
PISTON RING TO GROOVE CLEARANCE
Using a thickness gauge, measure the side clearances of the
1st and 2nd rings. If any of the clearances exceeds the limit,
replace both piston and piston rings.
 Piston ring-groove clearance
Service Limit (1st) : 0.180 mm (0.007 in)
 Piston ring groove width
Standard (1st) : 1.01 – 1.03 mm (0.0398 – 0.0406 in)
(2nd): 1.21 – 1.23 mm (0.0476 – 0.0484 in)
(Oil) : 2.51 – 2.53 mm (0.0988 – 0.0996 in)
 Piston ring thickness
Standard (1st) : 0.970 – 0.990 mm (0.0382 – 0.0390 in)
(2nd): 1.170 – 1.190 mm (0.0461 – 0.0469 in)
 09900-20803: Thickness gauge
09900-20205: Micrometer (0 – 25 mm)
(2nd): 0.150 mm (0.006 in)
ENGINE 3-41
15 mm (0.6 in)