Cutting out at wide open throttle. I can cruise up to any rpm but if I crack the throttle at 4500 or higher in any gear the bike starts to stumble, almost like a pre rev limiter feel.
She starts great, idles good ( a bit off cadence here and there at idle) pulls strong through all gears and generally runs strong.
I was thinking maybe some trash in the bowls sucking into the jet at hard acceleration. I went completely through the fuel system. Tore down the carbs, float level,etc all looks good. Drained the tank, freh gas, removed the pingle and found nothing other than a little grunge around the petcock screen. I do not have the little hidden fuel screen, removed that sucker years ago. Clean air filter. Vac caps are all new.
The pickup coil setting (0.8mm) was checked last year, reading on meter currently seems good. No recent changes, jetting changes, et.
I've tried swapping the following only to find the same results. Coils, plugs, plug wires, cdi. All connectors are good and tight. Good ground.
One thing I noticed over the years I seem to find myself adjusting the the idle alot, she's alwawys liked to idle around 1150-1200 but it seems to fluctuate either up or down a few 100rms over a days ride. Not sure what that is telling me.
I'm stumped and I'm sure I'm missing something but I have been very thorough chasing this gremlin over the last couple of weeks,
Any idea what I should be looking for that would cause the stumble?
