Carburetor Setting - Husqvarna TC 250 Owner's Manual

16.3

Carburetor setting

Effects of the carburetor setting
The different carburetor components must be tuned both to one another and for the use intended.
Main jet MJ
The main jet MJ has the greatest influence with the throttle slide open (full throttle).
If the insulator of a new spark plug is very light or white after a brief ride at full throttle, or if the engine knocks,
a larger main jet needs to be used. If the insulator is dark brown or sooty, a smaller main jet needs to be used.
Needle position POS
The needle position has the greatest influence in the mid throttle slide range.
–
Turn adjusting screw
A
play in the throttle grip.
Guideline
Play in throttle cable
–
Tighten nut 3
–
Slide on sleeve
400192-11
Finishing work
–
Check the throttle grip for smooth operation.
–
Install the fuel tank.
–
Install the right side cover. (
–
Mount the seat. (
–
Install the air filter box cover. (
–
Check the play in the throttle cable. (
16 TUNING THE ENGINE
2
in such a way there is throttle cable
2 ... 3 mm (0.08 ... 0.12 in)
.
1
.
( p. 76)
p. 74)
p. 67)
p. 69)
p. 120)
H01400-01
121