Translations:KAVAN FS400AR - Instruction manual/32/en

Throttle Valve Adjustment

The carburettor of the FS 400 has been set at the factory for best performance with the fuel tank located in the normal position (close to the back of the engine and where the level of the needle valve is at 2/3 height of the tank). However, the settings may, in some cases, vary slightly because of variations of fuel and climate. Additionally, during engine break-in, the needle valve is set rich, thus, the carburettor cannot be expected to show the best response. Therefore, it is recommended that the FS 400 be run first with the throttle settings as set at factory. After proper engine break-in, check the operation of the throttle according to the “IDLE ADJUSTMENT DIAGRAM” on the following page.