Losing power 1999 Honda Magna VF 750

What type of spark plugs did you install (NGK or DENSO)? Did you check the gap and/or gap them to 0.036? There are other possibilities. Do you own a multimeter? You may want to pull them and check the resistance. Maybe a coil wire is not seated or the coil and/or coil wire needs service or repair from being handled. Maybe it is a coincidence and there is another problem. If the ignition system checks out then move to fuel and air. Any questions please let me know. Good luck.