Yamaha RXZ- Squeakin cricket sound comin from engine

[tink2k]

Any kind souls willing to share of any knowledge.

my rxz,

i just serviced the carb, change EO, spark plug, exhaust gasket,

block gasket.

everything was fine.

rode for few hours, parked.

den start my bike again,

a squeakin cricket sound starts to produce.

 

it will idle.. as per normal 0.5 k den slowly drop n die.

start again rev abit to 3k.

 

idle as normal den same thing dies off.

this squeakin sound is bein produced at rpm of

0.1k- 5k.

 

could is be the air intake.?

plug coil?

bcos i got sum problem wif the wiring.

carb?

piston i doubt so.

bcos i just open the top head, piston head cylider all okay.

 

no leakage in any of the gasket.