50cc stock cylinder
17 amal carb (overkill i know, the bike used to be kitted)
my maxi has been running very well for the past couple of months, with top speed of a puzzleing mid 40's while running a slightly rich 40:1 mixture.
Yesterday on the way home from work it started four-stroking like a mf in midrange, bogging out at full throttle, and I had to lean out the mixture just to hold idle.
So four the queston, Why would my bike suddenly seem to have these way rich symptoms, Dirty plug from from the slightly rich mixture i was using? Timing slip? What does loss of compression feel like?