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10. CYLINDER/PISTON MYROAD 700i
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· The cylinder and piston can be serviced with the engine installed in the frame.
· When installing the cylinder, use a new cylinder gasket and make sure that the dowel pins are
correctly installed.
· After disassembly, clean the removed parts and dry them with compressed air before inspection.
SPECIFICATIONS (XCITING 250/250 AFI) Unit: mm
Item Standard Service Limit
I.D. 76.9+0.01576.9+0.005 76.965
Cylinder
Cylindricity 0.01 0.05
True roundness 0.01 0.05
Ring-to-groove top 0.030.07 0.1
clearance Second 0.030.07 0.1
top 0.250.35 0.65
Piston, Ring end gap Second 0.30.5 0.65
piston ring Oil side rail 0.20.7 0.85
Piston O.D. 76.895+076.895-0.02 76.825
Piston O.D. measuring position 10 mm from bottom of skirt
. Piston-to-cylinder clearance 0.010.04 0.14
Piston pin hole I.D. 18.00218.008 18.018
Piston pin O.D 1817.994 17.984
Piston-to-piston pin clearance 0.0020.014 0.044
Connecting rod small end I.D. bore 18.03418.016 18.044
10-2