Autoacceleration at the engine start

[santicuti]

Sorry for mi english, i am italian and i nere Your Help
After 2 years stop, the engine start but it have an autoacceleration to 5000 rpm.
I try a lot of time but autoacceleration its alwais the same and engine hold 5000/5500 rpm for ever
Does You ave some idea about it

[Kiwingenuity]

Hi there - hopefully we can help with a little more details.

• What year is your bike?
• Does the Throttle twist open and spring pull it closed smoothly?
• Does the bike start normally? Do you need to operate the choke (Idle set screw wound open?)

[herennow]

Hi, Does dropping the idle adjustment screw make any difference?  (Big plastic thumb screw under the carb)
Forza!

[santicuti]

hi,
thanks for yours answers.
my bike is a 2004 gs500
maybe i find the problem.
I can move the choke lever from zero to the maximum and vice versa, but in fact the choke is always set to maximum.
the choke lever cable has been broken and the choke has been trapped to the maximum.
I have to change the cable

[mr72]

That would do it!

You can manually push the "choke" back at the carb, BTW. Normally it springs back all by itself. If you disconnect the cable at the carb then you can operate it manually although it likely won't stay "on" and it will be a challenge to keep it on while you are warming up the bike.