TM RACING 250Fi MX, Use And Maintenance Manual

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4 S T R O K E S 4 S T R O K E S 4 S T R O K E S 4 S T R O K E S
5.2 DIAGNOSIS (450F SMR/SMM - ALL 530F)
Performing the scheduled maintenance operations on your motorcycle will make encountering problems unlikely. However, should a problem occur,
check the troubleshooting table and follow the instructions provided to solve the problem. Please note that operations marked with (A) require techni-
cal knowledge. For this reason and for your safety refer to an authorised tm workshop to carry out these operations. Your motorcycle will be serviced
optimally by specifically trained personnel. Contact a TM dealer if you have any questions.
Incorrect command
Ignition key not inserted
or not turned (SMR/SMM)
Faulty start-up relay
Discharged battery
Ambient temperature very low
Faulty starter motor
No fuel in the engine
Deteriorated fuel in carburettor
bowl
Interrupted fuel supply
Incorrect idle speed adjustment
Flooded engine
Wet spark plug
Incorrect distance between electrodes
Faulty start system
Damaged wiring
Damaged spark plug cap
Faulty kill switch (EN/SMR/SMM)
Faulty engine stop button (MX/SMX)
Open the fuel tap (18).
Refuel (37).
If the motorcycle is not used for more than 2 weeks, the fuel
should be drained from the carburettor bowl.
If this has not been done, close the fuel tap
and empty the bowl. Open the fuel tap again
and let the bowl fill up (76).
Make sure there is fuel in the tank and that the tap is closed.
Remove the fuel pipe from the carburettor, place it in a
basin and open the fuel tap.
Clean the carburettor if fuel escapes from the pipe (A).
If fuel does not leak from the pipe, check the tank vent
or clean the fuel tap.
Correctly adjust the idle speed (75).
Follow the hot start procedure (33).
Clean and dry the spark plug or replace it if required.
Adjust the distance between electrodes (0.8 mm).
Check the start system (A).
Check the wiring, earth connections,
connector integrity, cables and sheaths (A).
Check the spark plug cap and replace it if required.
Check the starter and kill switch (14) (A).
Check the engine stop button (15) (A).
Incorrect idle speed adjustment
Non-calibrated minimum air screw
Clogged minimum jet
Damaged spark plug
Faulty start system
Insufficient valve clearance
Correctly adjust the idle speed (75).
Adjust the minimum air screw (93).
Disassemble the carburettor and clean the minimum jet (A).
Replace the spark plug.
Check the start system (A).
Adjust valve clearance (A).
Faulty start system
Excess fuel in the bowl
Loosened maximum jet
Faulty ignition control unit
Check the start system (A).
Check the fuel level height and the seal of the
needle valve at the bowl fuel inlet (A) (page 76).
Tighten the maximum jet.
Replace the start control unit (A).
Repeat the procedure correctly to activate the starter motor
according to the motorcycle model (32-33).
Insert the ignition key and turn it clockwise (15).
Check the start relay and replace it (66).
Charge the battery and detect the cause of the discharge (65) (A).
Start the engine using the kick starter vigorously (17).
Check the starter motor (A).
PROBLEM
THE ENGINE DOES
NOT TURN OVER
(MODELS WITH E.S.)
THE ENGINE TURNS OVER
BUT FAILS TO START
(ALL MODELS)
THE ENGINE
DOES NOT STAY RUNNING
IN IDLE
THE ENGINE
DOES NOT REACH
FULL SPEED
CAUSE SOLUTION