Yamaha YP250 Mobility Scooter User Manual


 
2-4
MAINTENANCE SPECIFICATIONS
SPEC
Face Width Seat Width Margin Thickness
MAINTENANCE SPECIFICATIONS
ENGINE
Item
Standard Limit
Cylinder head:
Warp limit
SSS 0.03 mm
Cylinder:
Bore size
Out of round limit
69.000 X 69.005 mm
SSS
69.1 mm
0.03 mm
Camshaft:
Cam dimensions
Intake “A”
“B”
“C”
Exhaust “A”
“B”
“C”
Camshaft runout limit
36.545 X 36.645 mm
30.021 X 30.121 mm
6.524 mm
36.547 X 36.647 mm
30.067 X 30.167 mm
6.48 mm
SSS
36.45 mm
29.92 mm
SSS
36.45 mm
29.97 mm
SSS
0.03 mm
Cam chain:
Cam chain type/No. of links
DID SCSA-0404A SDH/104 SSS
Rocker arm/rocker armshaft:
Rocker arm inside diameter
Rocker shaft outside diameter
Rocker arm-to-rocker armshaft
clearance
12.000 X 12.018 mm
11.981 X 11.991 mm
0.009 X 0.012 mm
12.03 mm
11.995 mm
SSS
Valve, valve seat, valve guide:
Valve clearance (cold) IN
EX
0.08 X 0.12 mm
0.16 X 0.20 mm
SSS
SSS
Valve dimensions
“A” head diameter IN
EX
“B” face width IN
EX
“C” seat width IN
EX
“D” margin thickness IN
EX
Stem outside diameter IN
EX
Guide inside diameter IN
EX
33.9 X 34.1 mm
28.4 X 28.6 mm
3.394 X 3.960 mm
3.394 X 3.960 mm
0.9 X 1.1 mm
0.9 X 1.1 mm
0.8 X 1.2 mm
0.8 X 1.2 mm
5.975 X 5.990 mm
5.960 X 5.975 mm
6.000 X 6.012 mm
6.000 X 6.012 mm
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
5.94 mm
5.92 mm
6.05 mm
6.05 mm