Take off the cover and you will see the flywheel. Peer inside and you will see the points. There is a small screw (made of butter) that you undo and it allows the points to be adjucsted. Undo it just a bit and with a flat blade screwdriver put it in the slots and you can widen or narrow the gap. You do this with the timming mark F lined up on the flywheel and the V or arrow on the case. Points gap should be .012 to .016 inch. You need a thin feeler gauge. If the ponts are worn the right gap will not line up with the F mark and you need new points. You can see the points open so check the opening with the F mark if its way off new points. That means removing the flywheel so get back to us and we can fill you in. I can get pages off factory manual if you need it. Hope it all makes sense.
MXing in Australia. Mini 4 strokes rule! Australian Mini 4-strokes