Husqvarna TC 450 Workshop Manual page 146

ENGINE OVERHAULING
NEEDLE VALVE
Inspect needle valve (9) and valve seat (c)
Grooved wear (a): Replace. Dust (b): Clean.
THROTTLE VALVE
Check for free movement.
Stick: Repair or replace.
Insert the throttle valve (5) into the carburetor body, and check for free move-
ment.
JET NEEDLE
Inspect jet needle (6).
Bends/Wear: Replace.
Standard clip position: 4th Groove.
G.24 Part. N. 8000 H1344 (10-2009)