Carburetor Adjustment Procedure - Honda P-50 Shop Manual

79
Trouble
Probable ause
orrective Action
o
slow speed difficult
12.
Clogged slow and/ or pilot jet
o
high fuel consump tion 3. Clogged air vent pipe
2. Clean or re pair
3 . Over flow pipe
ser vesales as air
vent ; prevent from
blo cking
o
erratic operation
Poor high speed
performande
1.
Choke par t ially closed
2.
Clogged air vent pipe
1. Fully open the choke
va lve
3. Loose main jet, dropped or clogged
2. Re fer to part 4
above.
4. Jet needle dropped
A.
Adjustment Procedure
I. Air screw
Screw in fully and t hen back off l · J,.il turn.
2. Throttle stop screw
Loosen the throttle screw fully and t hen screw in
to obtain the proper idle speed of 1500 RPM.
Determ ine the pr oper id le speed by runn ing the
engine w ith the rear wheel off the gr ound, t he
point of maximum thro tt le opening w i th t he rear
whee l stationary.
3. Slow speed adjustment
Adjust t he engine t o smooth operation with the
air screw and t hen adjust to t he proper idle speed
wi t h t he thr ot tl e stop screw.
4. Medium and high speed adjustment
Adjust with the main jet.
If exhaust gas is dark, r eplace main jet with one
of smaller number and visa versa.
(Note)
Jets are precision parts, therefore, handle
with care to prevent damage. Finally, check
the fuel level.
3.
Clean main je t and
t ighten securely
4. Replace jet needle
clip
Fig. 2-51 (!) Air screw
@ Throttle stop screw
Fig. 2-52
CD
Genuine parts mark
®
Main jet No.