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CB250 Addendum
NOTE
The pilot screw is factory pre-set and should not be removed unless the carburetor is overhauled.
Turn thepilot screw in and carefully count the nurnber of turns befo re it seats lightly. Make a note of this to use as a
reference when reinstalling the pilot screw. If new pilot screw is installed, turn pilot screw out to the initia! opening
before making a pilot screw adjustment (page
19-20).
'-
Requisite Service
•
Carburetor remova1/installation (page
19-17)
Procedure
Q'ty
Remarks
Vacuum Chamber Disassembly Order
Assembly is in the reverse order of disassembly.
(1 )
Vacuum chamber cover screws
4
(2)
Vacuum chamber cover
1
NOTE
• Atinstallation, hold the piston almost full open to avoid
pinching the diaphragm with chamber.
(3)
Spring
1
(4)
Diaphragm/vacuum piston
1
(5)
Jet needle holder
1
(6)
Spring
1
(7)
Jet needle
1
Float Chamber Disassernblv Order
Assembly is in the reverse order of disassembly.
(8)
Carbu reto r he ate r
1
(9)
Collar
_1
(10)
Float chamber cover screws
4
At installation, first tightenthe two screws on the dowel
pin side.
(11 )
Float chamber
1
(12)
Float pin
1
(13)
Float
1
For float leve! of inspection, refer to the section
8
of the
Common Service Manual.
.,
(14)
Float valve
1
(15)'
Main jet
1
(16)
Needte jetholder
1
(17)
Needle jet
1
(18)
Slow jet
1
. Bystarter Valve Disassembly Order
Assembly isin the reverse order of disassembly.
(19)
Bystarter valve
1
(ZO)
Spring
1
"
(21 )
Valve nut
1
Pilot screw Disassembly Order
Assembly is in the reverse order of disassemb1y.
(22)
Pilot screw
1
(23)
Spring
1
(24)
Washer
1
(25)
O-ring
1
L
19-19
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