Yamaha XZ550RJ 1982 Owner's Manual page 239

Troubleshooting chart
1'4MMii ______ _
Never check the fuel system
while smoking or in the
vicinity of an open frame.
1. Fuel
2.
Check if there is
fuel in the
fuel tank
Compression
Use electric
Remove the fuel
cock drain screw
Turn the fuel
cock to "ON"
Turn the fuel
cock to "RES"
Full of fuel
No fuel
Restart engine
Turn the fuel cock
to"PRI"
Compression normal
Check fuel flow
Clean filter- cock
No irregularity up
to fuel cock
Clean fuel cock
starter
Ask Yamaha dealer to inspect
3. Ignition
Remove spark
plug(s) and
check electrode
4. Battery
Use electric
starter
Wipe clean with dry
cloth
Anach plug cap and
ground to chassis
Engine turns
over quickly
Engine turns
over slowty
Banerygood
Check fluid, recharge,
check connections
Use electric
starter
-227-
No spark
Ignition system normal
Adjust plug gap or
replace plug(s)
Ask Yamaha dealer to inspect