I'm new here and not sure if this is the proper place to post but seems the best spot.
I just replaced the rings and intake valves on my 04 crf250r. I used oem rings, set the ring gap properly, pro-x gasket set, and new pro-x steel intake valves and springs. The valve lash is .005" and .004", timing is spot on, carb is cleaned and jetting is all original and mixture screw is a little more than 2-1/4 turns out. Exhaust and the rest of the bike is stock except a uni air filter.
I have premium fuel in my tank and still smells and looks ok (bike hasn't been ran since October. Spark is nice and blue. This piece of . started after assembly and ran for about 5 seconds and I shut it off (no muffler or coolant and is in my basement). I kicked it the other night after adding coolant and putting on my muffler and it started but puttered out. I kicked it a few more times and it started and puttered out when I tried giving it gas. Hasn't started since. I have checked everything. The kick feels nice and solid so I feel compression is good although I haven't busted out a compression tester. The bike was a real asshole to start prior to valves wearing out but now I have a chunk missing out of my boot and my foot is swollen and I can't get . out of this bike. Any ideas???!!