Gilera Runner RST 50 SP, Service Station Manual, Page: 85 / 183

• Remove the 2 plug stops by a screwdriver inser-
ted into the special slits on the piston
• Remove piston pin and remove the piston
N.B.
USE PAPER OR A CLOTH TO CLOSE THE CYLINDER
HOUSING MOUTH ON THE CRANKCASE TO PREVENT
SLIPPAGE OF ONE OF THE PIN LOCKING RINGS INTO
THE CASE.
• Remove the roller from the connecting rod as
shown in the figure
• Remove the piston sealing rings
CAUTION
NOTE THE ASSEMBLY POSITIONS OF THE LININGS TO
PREVENT INVERTING THE POSITION IN CASE OF REUSE.
N.B.
BE CAREFUL NOT TO DAMAGE THE SEALING RINGS
DURING REMOVAL.
Inspecting the small end
- Measure the internal diameter of the small end
using an internal micrometer.
N.B.
IF THE DIAMETER OF THE ROD SMALL END EXCEEDS
THE MAXIMUM DIAMETER ALLOWED, SHOWS SIGNS OF
WEAR OR OVERHEATING REPLACE THE CRANKSHAFT
AS DESCRIBED IN THE "CRANKCASE AND CRANK-
SHAFT" CHAPTER".
Characteristic
Rod small end: standard diameter
17 +0.011-0.001
Rod small end: maximum allowable diameter
17,060 mm
Runner RST 50 SP
Engine
ENG - 85