So I recently did a head gasket on my 90mm 2.4 and got it all back together and it ran great for a solid day then the next day it would barley start and spit and sputter. Figured out the rocker are bar bolts were sheared. Fixed that and went to fix the timing. To I just re timed everything. Did it as told on this forum. And now it won't even start. And it has an awful backfire too. I don't know what I did wrong. Please help!