They should be able to handle a 1080 no problem. I am at 836 now. I had no problems with the voltage with the 3 0hm coils before the fuel injection. There is a volt meter on the bike and I would monitor it while riding,I was getting 13.5V too. That seemed ok to me until I put in the halogen headlight. I doubt if you would ever get 14.5V. I realized I had it wired so the low beam was on all the time and high was switched in, so both where on at the same time. This was too much for the charging system (went to 12v). Have it set up now that its all off until I switch to high beam, then just high beam comes on. I got a few permanent magnet flywheels in, haven't found one that directly fits the crank yet. Got a magna one that is the right taper but it is flipped over the other way. The coils are under the flywheel next to case not in the cover. If anyone knows of a permant mag flywheel that has the same taper as a cb750 besides the weak cb350 one, please let me know. Also any ideas of a slick way to adapt one of a different bore or taper would be great too.