I decided to put a new plates clutch,because wend i put first gear is going too quick wend i lose the handle clutch,just change the plates and is doing the same problem,any idea how i can fix this.

Thanks .

There might be various causes:
oil exaust or air bubbles in circuit
master or slave piston worn
incorrect regulation of the screw in the main plate
are the first things to control.
Can you please put your location in the profile? it will be easier to help you!