Can anyone explain to me how this works on the kayo 70? What I mean is that as a stop giving it full throttle it slowly works up to full power in order so that the child doesn't get tossed back?

Ideally I'd like to remove this if possible as my son can't even stop and go on a slight hill in our back yard.

 

It shouldn’t be that soft on the clutch release that you can’t go up a small hill. Does it start to move once the revs build? It sounds like the cliutch could be slipping a bit.

 

Bullnose screw on Kayo 70cc on back of throttle box, twist to add power
On the Kayo 70, behind the throttle is a stub nose screw. Get pliers and twist it counter clockwise and it will unscrew giving the throttle more play and giving it a lot more power. It is sold ready for beginners and so it won’t have much low end power