Translations:KAVAN AP06A - Instruction Manual/80/en

2) After the engine has warmed up, advance the throttle to full and slowly lean the high speed valve until the engine reaches peak R.P.M. After reaching peak R.P.M. richen the mixture slightly until an audible drop in R.P.M. is heard. If you are using a tachometer this should be between a 200 - 300 R.P.M. drop.