Translations:KAVAN AP09A - Instruction Manual/120/en

Due to the single-needle design of the carburettor, the idle speed will be relatively high, up to around 6000 rpm before a proper break-in. After breaking-in, the main needle can be closed more to set a leaner mixture. This will also be reflected in a drop in idle speed to somewhere between 4,000 and 5,000 rpm.