AY50K1 K2/WRK1 K2 (’01 ’02-MODEL) 11-9
THERMOSTAT + RADIATOR + ENGINE COOLANT TEMP. SWITCH +
ENGINE COOLANT
ITEM STANDARD/SPECIFICATION LIMIT
Thermostat valve opening
*Approx. 65°C ———
temperature
Thermostat valve lift *Over 3 mm at 80°C ———
Radiator reservoir cap valve
opening pressure
100 kPa (1.0 kgf/cm
2
) ———
Engine coolant temp.
ON *Approx. 125°C ———
switch operating
temperature
OFF *Approx. 118°C ———
Engine coolant type
———
Engine coolant including
reserve
1 200 ml ———
TRANSMISSION Unit: mm Except ratio
ITEM STANDARD LIMIT
Reduction ratio P-02,18,22,39 Variable 2.975 – 0.781 ———
P-04,26,34,53 Variable 2.975 – 1.140 ———
Final reduction ratio P-02,18,22,39 16.271 (51/15 × 67/14) ———
P-04,26,34,53 13.812 (51/15 × 65/16) ———
Drive belt width 18.4 17.4
Driven face spring free length 110 104.5
CARBURETOR
ITEM
SPECIFICATION
P-04, 26, 53 P-34 P-18
Carburetor type KEIHIN PWS14 KEIHIN PWS12 ←
Bore size 14 mm 12 mm ←
I.D. No. 35EC 35EH 35EB
Idle r/min. 1 900 ± 200 r/min. ← 1 700 ± 200 r/min.
Float height 5.1 ± 0.5 mm ←←
Main jet (M.J.) #68 #65 #55
Jet needle (J.N.) N4WA-4th 6LQJ-5th N5GJ-3rd
Pilot jet (P.J.) #48 #45 #35
Air screw (A.S.) 1¾ turns back 2 turns back
3
/
8
turn back
Throttle cable play 2 – 4 mm ←←
Use an anti-freeze/coolant compatible with alumi-
num radiator, mixed with distilled water only, at the
ratio of 50:50.
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