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Adjustments for Competition 121
Carburetor Adjustments & Tuning Tips
11. Change the main jet (5) and slow jet (6) as
required.
Main jet;
1.1 lbf·ft (1.5 N·m, 0.2 kgf·m)
Slow jet:
1.1 lbf·ft (1.5 N·m, 0.2 kgf·m)
15. Remove the clip (11) and jet needle (12)
from the jet needle holder (13).
(11) clip
(12) jet needle
(13) jet needle holder
16. Change the clip position of jet needle or jet
needle as required.
17. Reinstall the jet needle/holder assembly and
tighten it to the specified torque:
1.5 lbf·ft (2.1 N·m, 0.2 kgf·m)
18. Reinstall the carburetor top, cable clamp and
carburetor top screws. Tighten the
carburetor top screws to the specified torque:
1.5 lbf·ft (2.1 N·m, 0.2 kgf·m)
(14) tabs
(15) grooves
(16) connecting tube clamp screw
(5)
(6)
(10)
(9)
(8)
(7)
(13)
(11)
(12)
(15)
(15)
(16)(14)
(7) carburetor top screws
(8) cable clamp
(9) carburetor top
(10) jet needle/holder assembly
19. Rotate the carburetor and align the tabs (14)
on the carburetor with the grooves (15) on
the insulator and connecting tube.
20. Tighten the connecting tube clamp screw
(16) so the gap between the tabs of the
clamp is 0.1 ± 0.04 in (3 ± 1 mm).
(5) main jet (6) slow jet
12. Reinstall the float bowl plug and tighten it to
the specified torque:
3.6 lbf·ft (4.9 N·m, 0.5 kgf·m)
If you’ve determine that the jet needle or clip
position of jet needle must be changed, you must
remove the carburetor top.
13. Rotate the carburetor to the right and remove
the carburetor top screws (7), cable clamp (8)
and carburetor top (9).
14. Remove the jet needle/holder assembly (10).
0.1 ± 0.04 in (3 ± 1 mm)
(cont’d)
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