Keihin" Carburettor Adjustment (Tc) - Husqvarna TC 250 2010 Workshop Manual

ENGINE OVERHAUL

"Keihin" carburettor adjustment (TC)

Adjust the carburettor with warm engine and with the throttle control in closed
position. Proceed as follows:
- turn the idle speed adjuster screw (1) located on the left-hand side of the
vehicle, until setting idle RPM quite high (turn clockwise to increase the speed
and counter clockwise to reduce the speed).
- Turn the adjuster screw (2) clockwise to fully closed position, and then turn
it back 1.5 turns.
- Gradually loosen the screw (1) until achieving suitable idle speed setting.
NOTES
If the engine is difficult to start, the idle jet may be the wrong size. When this is
the case: turn in the screw (2) to the fully closed position. If engine RPM does
not change, you need to install a smaller jet. If the engine stalls before reaching
the fully closed position when you tighten the screw (2), you need a larger jet.
Change the jet and repeat the "Carburettor adjustment" procedure described
above.
Sluggish acceleration or slow engine response at full throttle or a fouled spark
plug may indicate a worn throttle valve, taper needle and main nozzle. Further
details are given in the following pages (mixture enrichment).
G.22 Part. N. 8000 H1489 (10-2009)