2011 Rancher 420 missing

Working on a Honda Rancher 420 that was sitting up for a few years, I cleaned tank, changed petcock, fuel pump assembly and fuel injector. Bike now starts and idles but misses bad when given throttle, around 1/4 throttle is almost sounds like a rev limiter.

I changed spark plug and checked all connections to PCM and sensors.

Any Ideas? Thanks in Advance.