I just changed cam plates to the hyd tensioner and bigger oil pump. I took 3 days and kept my book beside me as well as referencing this site. I matched dots on the cams and sprockets , aligned the oil pump with alignment tools from e-bay. My problem started when I put the PR,s and rocker boxes in. I finished and started the bike ,only one cylinder was firing . I did a compression test and found the back jug had none and the front 150 . I pulled the PR's and found I mixed them up and they were backwards . switched and assembled ,now 170 psi back jug ,the problem is it runs rough and has low oil pressure . Could i have messed up something serious ? both cylinders are now firing, oil pressure good until under 1500 rpm . any help or suggestions would be appreciated. 99 flht carb 84,000 miles Update , now it wont start both oil lights are coming on, any suggestions are appreciated .