Yamaha YP250 Service Manual page 28

Item
Automatic centrifugal clutch:
Clutch shoe thickness
Clutch housing inside diameter
Clutch shoe spring free length
Weight outside diameter
Clutch – in revolution
Clutch – stall revolution
V-belt:
V-belt width
Carburetor:
Type
I.D. mark
Ventuly outside diameter
Main jet
Main air jet
Jet needle
Throttle valve size
Pilot air jet
Needle jet
Pilot outlet
Pilot jet
Bypass
Pilot screw
Valve seat size
Starter jet 1
Starter jet 2
Float height
Engine idle speed
Intake vacuum
Oil temperature
Cooling water temperature
Fuel pump:
Type
Model/manufacturer
Oil pump:
Type
Tip clearance
Side clearance
Housing and rotor clearance
MAINTENANCE SPECIFICATIONS
Standard
3.0 mm
135 mm
28.1 mm
20 mm
2,100 X 2,700 r/min
3,700 X 4,700 r/min
22.6 mm
Y28V-1B-1
4UC 00 [4UD 00 (CH, A)]
ø28
(M.J) #130
(M.A.J) ø0.9
(J.N) 5D32-3/5
(Th.V) 11_
(P.A.J.1) ø1.2
(N.J) ø2.585
(P.O) ø0.8
(P.J) #44
(B.P) 0.7 4
(P.S) 17/8
(V.S) 1.4
(G.S.1) ø0.45
(G.S.2) ø0.5
(F.H) 27 mm
1,450 X 1,550 r/min
220 X 260 mmHg
65 X 75_C
80_C
Vaccum type
4HC/MIKUNI
Trochoid type
0.1 X 0.34 mm
0.013 X 0.036 mm
0.04 X 0.09 mm
2-6
SPEC
Limit
2.0 mm
135.5 mm
SSS
19.5 mm
SSS
SSS
21.0 mm
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
0.4 mm
0.15 mm
0.15 mm