Possible Cause Operation
Loose nozzles Check the maximum and minimum nozzles are
adequately fixed in their fittings
Incorrect float level Restore the level in the tank by bending on the float
the thrusting reed of the petrol inlet rod so as to
have the float parallel to the tank level with the
carburettor inverted.
Transmission and brakes
Clutch grabbing or performing inadequately
IRREGULAR CLUTCH PERFORMANCE OR SLIPPAGE
Possible Cause Operation
Slippage or irregular functioning Check that there is no grease on the masses.
Check that the faying surface between the clutch
masses and the clutch bell is mainly in the middle
and with equivalent specifications on the three
masses.
Check that the clutch bell is not scored or worn
abnormally
Never run the engine without the clutch bell
Insufficient braking
INEFFICIENT OR NOISY BRAKING
Possible Cause Operation
Worn brake pads or shoes Replace the brake pads or shoes and check for
brake disk or drum wear conditions.
Front brake disk loose or deformed Check the brake disc screws are locked; use a dial
gauge and a wheel mounted on the vehicle to
measure the axial shift of the disc.
Air bubbles inside the hydraulic braking system Carefully bleed the hydraulic braking system,
(there must be no flexible movement of the brake
lever).
Fluid leakage in hydraulic braking system Failing elastic fittings, plunger or brake pump
seals, replace
Excessive backlash in the rear brake control cable Adjust the backlash with the appropriate adjuster
located on the back part of the crankcase.
Brakes overheating
BRAKES OVERHEATING
Possible Cause Operation
Rubber gaskets swollen or stuck Replace gaskets.
Compensation holes on the pump clogged Clean carefully and blast with compressed air
Brake disc slack or distorted Check the brake disc screws are locked; use a dial
gauge and a wheel mounted on the vehicle to
measure the axial shift of the disc.
Troubleshooting Fly 125 - 150 4T
TROUBL - 48
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