Piston Rings - PIAGGIO MP3 500 i.e. SPORT Service Station Manual

MP3 500 i.e. SPORT Business_LT_ ABS-ASR_EU_USA (2015)
Characteristics
N.B.
THE PISTON MUST BE INSTALLED WITH THE ARROW FACING TOWARDS THE EXHAUST SIDE,
THE PISTON RINGS MUST BE INSTALLED WITH THE WORD «TOP» OR THE STAMPED MARK
FACING UPWARDS.

Piston rings

* Fit piston rings «2» and «3» with the mark «TOP» facing up.
** Position the opening in the rings as shown in this figure.
*** Value «A» of the sealing ring inside the cylinder.
Check the size of the sealing ring opening:
Compression ring: 0.15 ÷ 0.35 mm. Max. value: 0.5 mm
Scraper ring: 0.25 ÷ 0.50 mm. Max. value: 0.65 mm
Scraper ring: 0.25 ÷ 0.50 mm. Max. value: 0.65 mm
Rings/slots coupling clearances:
Carefully clean the sealing rings housings.
Check coupling clearances by placing a thickness
gauge between the ring and the slot as shown in
the figure.
Top ring: Standard coupling clearance:
0.01÷0.06 mm
Maximum clearances allowed after use: 0.10
mm
CHAR - 15