Could you please describe the -problem- more clearly?

It is simply impossible to understand what is going on for you.

Clutch slip at speed when torque is increased is a common problem.

Worn shock-absorber in shafts and gearboxes may cause accelleration problems...

Worn splines may cause weird phenomenas...

Loose wheel-axels may cause problems...

Loose shocks will cause problems...

Loose Subframe will caused phenomenas...

Clutch leaver not adjusted correctly may cause sudden clutch slipping...

Swingbearing not set propperly or worn-out may cause perculiar happenings...

A bad rim may cause weir stuff...

...and so on...


What have you done with the bike?
- new bottom-end (=½ new engine).
- what else did you do?
- cast or sprocket wheels?

And, by the way, there is no way in... that you can -feel- a dragging central- or side stand. You hear it, but thats all you do - I know for sure; mine is dragging (poor service on my part an excellent on the road salts part...).
Perhaps you try to describe that odd weird feeling of a "braking" somewhere in-spite that there isn't anything obvious causing this? Had that a lot the last year... feels like the tires "glues" to the tar...

Do NOT set the timing beyond the full advance marker... the exhaust fumes get really hot... that will in time damage the exhaust valve and may result in a separation between the disc and valvestem... my right exhaust valve did this to me back in 2006 at 5200rpm.
Reset the timing to the correct! Ok... - the bike will not start as easilly and it will not rev as happilly; if that is a major down for you - change the Bings to Mikuni, Keihan or dell'Orto (I recommend 36-38mm).

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Drive Safely,
Albert