Just got my Honda z50r together enough for a first ride yesterday. Got it running for about 30 seconds until the needle and seat stuck and flooded the engine. I let it sit for a few hours to dry out and now it won't start at all, just either pops once or twice or backfires out the carb. Any ideas? I was thinking timing but how would the timing change so suddenly apart from a sheared flywheel key (checked that)?