last week I proceeded to do the valve adjustment to my GRiSO. Used the step by step on this forum -- really helpful. It was quite easy actually!
The bike has 10K miles. I found all the exhaust valve were really loose, and the intake valves, 3 out of 4 needed to be tight back to spec as well, but not as bad.
Last time the Guzzi dealer *supposedly* did them at 5K, but now I have my doubts..( same dealer that missed 1 KG of engine oil after service, which I checked after reading some horror story GRiSO without enough oil engine failure!!)
After valve back to spec engine performance has improved a lot ( already Bettle mapped with Agostini HF) ...
- No more extra pops when letting go of the throttle at high RPM
- Very noticeable better RPM pick up and overall throttle response
I was surprised how a simple valve adjustment made such a huge difference.
I have a throttle body clean up and balancing in my next to do list ( per 12K service manual)... even if now I am really quite pleased by the beast