GRiSO 8 V clutch operation

Hello, i have a problem with my 2009 GRiSO with 50000 km., when i am driving under 5000 rpm. the clutch and gearshift seems to work normal, when i increase trotthle and revs, it looks if the shifting is not completed, and the clutch lever feels very strange, like the gear is not shifted totally. or the clutch is not coming back in normal position.
This only occurs when i am acclerating at full power and revs., i can not shift trough the gears at a proper manner, it is difficult to explain, but i hope it is recognizable, i already changed the upper clutch cilinder with another one, the gear lever is fully loose, perhaps the clutch cilinder in the gear box? For the rest still a great bike, with excellent looks.

Greetings Jos

Sounds like it needs bleeding Jos.

Hello, the bleeding is perfect is my opinion, it feels fine when i engage the clutch, no soft feeling or what so ever,

Does this change if you alter the lever span?

Jos i know this sounds strange but check the height of the gear change lever - we all tend to tense up when accelerating hard and you may have changed your seating position or not be moving your foot as far up as you do when sitting relaxed.

This problem can also arise if you are wearing shoes or boots of a different shape or thickness.

Seriously

Hello, I would like to mention that my clutchproblem is solved, before above 5000 rpm the gear box was blocked, now i have changed the bushing in the input shaft from the gearbox, it had a lot of play with the clutchtappet, and now it looks like that cluctch operation and gearshifting problems are gone.

Well that's a weird one.......