I am in need of some help I am working on a 05 TRX450R it will kick over but it will also lock the kick starter up to the point its like trying to kick of a big v-twin motor with out a decompression release. I’ve checked valve clearance and adjusted still giving me issues, wondering if the decompression valves had issues in the past with these things. Any input would be great. Been working on bikes and atv’s for 13 years and this is actually a first for me.

Thanks