Originally posted by adamkerrnz
I was doing some high speed test running on my street today and i noticed that when i stop after the engine was doing a high speed run, the engine woul rev quite a bit higher than idle then die back down to idle revs after about 3 seconds. is this normal or can someone tell me something to adjust on my carb that can fix this.
It is somewhat normal if you are doing a long high speed run, turning around and doing another long high speed run, continue until you run out fuel. You need to richen up the top end needle on the motor to handle repeated long (I am talking over 60m long) high speed runs. This type of thing does not happen on the track in general and you need to tune the motor slightly differently.