Yamaha MX775, Руководство по обслуживанию

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TR
OUBL
ESHOO
T
ING
OTHER TROUBLES
OTHER TROUBLES
ENGINE STARTS BUT STALLS
No. Checking steps Possible remedy
1 Check the fuel level. Add the fuel if it is insufficient.
2 Check if the fuel filter is clogged. Clean or replace.
3 Check if the fuel hoses is clogged. Clean.
4
Check if there is air suction from the throttle body assembly
joint, gasket, or throttle shaft.
• Tighten the throttle body assembly
nuts securely.
• Replace the throttle body assembly
joint or gasket with a new one.
5
Check the fuel pumps.
(Refer to “FUEL PUMPS” on page 4-1)
Replace the fuel pumps.
6
Check the low engine speed.
(Refer to “ENGINE SPEED” on page 2-14)
Adjust the low engine speed.
7
Measure the valve clearance.
(Refer to “ADJUSTING THE VALVE CLEARANCE” on
page 2-9)
Adjust the valve clearance.
8
Check the compression pressure.
(Refer to “MEASURING THE COMPRESSION PRES-
SURE” on page 3-1)
Too high:
Decarbonize the combustion chamber if
there is carbon deposits.
Too low:
Next checking steps.
9
Check if there is seizure, wear, or damage on the piston,
piston ring, or cylinder.
(Refer to “PISTONS, CAMSHAFT, CRANKCASE, AND
CRANKSHAFT” on page 3-38)
Rebore or replace.
10
Check the crankshaft position sensor air gap.
(Refer to “INSTALLING THE CRANKSHAFT POSITION
SENSOR” on page 3-19)
Adjust.