If is the clutch the trouble, a belt too short it is possible ? or bad clutch setting ? , Because in the drive clutch the belt make a Black line at the 3/4 of the Clutch and when is arrives that brake the motor and the motor can't go to full open but is only when the oddy foward, when it is at Neutral position the belt go at the top of clutch and is ok , is only when the oddy run foward. The motor setting is OK and it want to run open trottle, but is brake at 3/4 because the clutch don't run great . And to other idea , the Rave Valves in trouble can make this too ? It is the three idea i have , but i doesn't Know what is the trouble.
Can say me your idea about that ?
tanks A+