trk a verter help needed

#1
My Bird Romper 3 wheeler has i think a cat 99 tork a verter.Before I disassembled everything it seemed like the driven wasnt working right.Seemed to be opening too soon and killing the power but im not sure.What would i look for visually to inspect?
Im about ready to put the engine back on and the tork a verter.Any ideas or advice?

Thanks
 
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