Stalling

[Fivehunny]

Hello,
My bike sometimes stalls. When I slow down and when I-m starting to ride, it sometimes stalls, liek BOOAAA. It doesen't help to twist the throtle. Afterwards it always starts fine.

The engine is slightly ported. Stock pilot is 55, I've tried that and 60+65. Stock main is 175, I've tried that and is now running 182.

Stock needle is in fourth pos. It's too rich (with 65/182).

After driving the spark is light grey.

Is the engine lean or rich?

Can anyone help me, please! What shall I do?

 

[Fivehunny]

zxcvxzcv

 

[jaypro55]

Well what kind of bike do you have? What kind of gas and oil do you run and at what ratio? If you've experimented with the jetting to no avail it could be a stuck powervalve you're dealing with. You might want to take off the cover and examine that next. Are you smoking and spooging a lot? That could signal a bad crankseal on the right side which is allowing oil to get into the combustion chamber...Post back with more info.