Hey guys, I rebuilt this thing. Bought it in pieces. P.O. said it had no compression to the point where he could push over easily with hand. Still ran though...Rebuilt top end to find it was 66mm. Bought Namura 66 mm bore piston kit. Started up fine. Carbs were overflowing. Cleaned carbs, Assembled and it wouldnt start easily. Intake leak in right boot...replaced...quad wouldnt start without starting fluid at first then started fine. Today, I poured a lil premix directly in cylinder and she fired right up. Left cylinder was backfiring and missing. Tried to run compression test but was probably doing it wrong, Anyhow, both looked in the same ballpark. Took carb off in last ditch effort. Turn bowl upside down, voila, a jet falls out of the bowl, 1.4 it says. I cannot find where she resides though...Could this jet be the core of my issues?