APRILIA RS 250 Service And Repair Manual page 218

CARBURETTOR
Item
Carburetor type
Bore size
I.D. No.
Idle rpm
Fuel level
Float height
Main jet
Jet needle
Needle jet
Cut-away
Pilot jet
By - pass
Pilot outlet
Valve seat
Starter jet
Power jet
Air screw
Throttle cable play
ELECTRICAL
Item
Ignition timing
Spark plug
Spark performance
Ignition coil resistance
Generator coil resistance
Magneto coil resistance
Generator no-load voltage
Regulated voltage
Water temperature gauge
resistance
Standard
(M.J.)
(J.N.)
(N.J.) 0 - 8
(C.A.)
(P.J.) # 27,5
(B.P.)
(P.O.)
(V.S.)
(G.S.)
No. 1
No. 2
(A.S.)
Standard type
Upper heat
range type
Lower heat
range type
Gap
Primary
Secondary
Pick-up
coil
More than 49 V (AC) at 5.000 rpm (Y - Y)
SERVICING INFORMATIONM8 - 52
Catalysed version
MIKUNI TM34SS
34 mm
23D4
1.300 ± 150 rpm
7,1 ± 0,5 mm
8 ± 1,0 mm
L : # 270, R : # 280
6GH8 - 55 - 3
1,5 mm
0,6 mm
0,6 mm
2,5 mm
# 45
L : # 55, R: # 35
0,7 mm
–
0,5 - 1 mm
Specification
10° B.T.D.C. at 1.300 rpm
NGK BR9ECM
NGK BR8ECM
NGK BR10ECM
0,7 - 0,8 mm
Over 8 mm at 1 atm.
0,17 - 0,5 Ω (B/Y - W/L)
5 - 30 kΩ
(Plug cap - Terminal)
0,1 - 1 Ω (Y - Y)
20 - 200 Ω (Br - W)
20 - 200 Ω (R - W)
13,0 - 15,5 V at 5.000 rpm
50 Ω at 90 ÷95°C
15 Ω at 120 ÷130°C
0 - 9
# 20