I had mine jack me up for a year and a half, it just never made the power it should up top.I spent hundreds in caps, coil,CDI, 3 sets of domes, base gaskets, and dozens of hours tuning etc. Finally tuning it on a dyno it made the same HP over a wide rpm range 8,000-10,500 it just flatlined and made the same HP at 8K as it did at 10K. Nate McCoy said "you have a ricky stator don't you?". I put on a stocker and it made 18 more hp. A 20 min fix I fought for 1 1/2 yrs.