Okay this is my first post here, ive read hundreds of threads and finally decided to create an account. So here is the deal i had a perfectly running basically bone stock 66cc (nt carb 66jet, 2nd to top needle setting) and i had to ride 8 miles in the rain and it went south about a half mile from home... the bike started 4 stroking HARD then bogging/cutting out for a full couple seconds and then just 4 strokes for a few more seconds just to bog cut out for another couple seconds for the rest of the way. when i arrived at home i idled the bike for 10 minutes with a heater pointed at the magneto after i took the case off. (ive completely submerged an engine before after running it off a dock, did this process and the motor lived happily ever after) The next day its business as usual until about 22,23,24 mph and 4 stroking comes on hard followed by bogging out.... ran like this for 2 days and ive tried everything from different exhaust, different head, new magneto, new magneto magnet, new cdi, different carb, and now the motor has slowly begun to 4 stroke/bog at a lower and lower speed and now barely goes 10 mph and pulsates while at idle and WOT!! CLUTCH IN OR RIDING IT DOES THE SAME THING! if anyone has any recommendations on a fix let me know, this is my 5th build and im stumped.