Sym GTS 250 Service Manual page 52

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4. Fuel System
Remove fuel needle seat, spring, and injector
Piston Needle seat Needle
needle.
Inspection
Check if the vacuum piston and needle for wear
out, crack or other damage.
Check if the diaphragm for damage or crack.
Caution
Do not damage vacuum diaphragm.
●
Spring
Installation
Install in reverse order of removal procedures.
2 screws
4-5