Backfire???

[az300]

My warrior is backfiring at idle. When I go to give it gas it backfires more and won't go more than 5 mph. I thought the problem might be in the carb so I took it off and cleaned it out ( was pretty clean) changed to smaller jet at the same time since plug was black. Where do I go from here???

[m36indiana]

id check the keyway on your flywheel. ill bet it broke and put the timing off, or your jumped time on your timing chain

[az300]

It ended up being my parking brake. The switch was over but the brake was not set causing the engine to think that it was set.