18-09-20, 02:01 PM
Sorry, having just re-read what the symptoms are, I think my last suggestion was wrong.
You say you've loosened adjustments at the lever and sprocket cover when they actually need tightening.
The lever adjustment admittedly, could be called loosening because you're turning the adjuster anticlockwise to tighten the cable. The bottom adjustment needs to go clockwise to achieve the same effect at the lever.
Also, check the sprocket cover and crankcase are clean along the mating surfaces before screwing them together tight. Dirt or looseness there will increase the distance the actuator needs to move before it starts pushing on the rod.