Bought a 05 TRX 350 basketcase. Guy said he redid the top end but " put it together wrong" and tore up a pushrod. Had all new parts including a cam...My only conclusion was that he forgot the lifters. This due to the way the rod was dinged and the marks on the old cam. So I put in all the new parts, adjusted the valves and during rollover with the plug out, I keep hitting a hard spot that requires a pretty good push on the wrench to complete the rotation. Is this due to the compression release?