yamaha f115 Timing drops

[magnumrapala]

the motor is a yamaha f115 and at about 3000 rps the timing falls back and this shows on the laptop. I have tryed a different brain and that didn't help at all and i have put a new TPS on and cleaned the VST. Any suggestions?

 

[99yam40]

Re: yamaha f115 Timing drops

how far does the timing move? from where to where and when?

You are not giving much info