Piston Ring Groove Width; Piston Ring Thickness; Piston Ring End Gap - Suzuki VL800 Service Manual

3-34 ENGINE
PISTON-TO-CYLINDER CLEARANCE
As a result of the aforesaid measurement, if the piston to cylinder
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: 0.12 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) : 0.18 mm (0.0071 in)
(2nd) : 0.15 mm (0.0059 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)
PISTON RING FREE END GAP AND END GAP
Before installing piston rings, measure the free end gap of each
ring using vernier calipers. Next fit the ing in the cylinder, and
measure each ring end gap using a thickness gauge.
If any ring has an excess end gap replace the ring.
" Piston ring free end gap
Service Limit (1st) : 7.7 mm (0.30 in)
(2nd) : 9.4 mm (0.37 in)

" Piston ring end gap

Service Limit(1st) : 0.70 mm (0.028 in)
(2nd): 0.70 mm (0.028 in)
% 09900-20102: Vernier calipers
09900-20803: Thickness gauge