I have a 99 ZR 600. Had it in the shop every year, last 2 years. Told each time, it is fixed, charged hundreds, just got back from Michigan UP, SAME issue.
Sled starts fine, idles fine, runs fine, then trouble. I can get teh sled to @ 40-50MPH, 1/2 throttle, any more, and it bogs down, tries to die. Often will back fire. Tried new gas, higher octane, fuel injector cleaner, iso heat, last year the deal "fixed it" at teh end of the year. They found a bad temp. sensor, um BULL****! I put 5 miles on it (first time riddne this year), and it was doign it again!
I have suggested the stator, they have yet to act on that.
What can I do? would rather not drop $500 plus labor into this sled. It only has 2500 miles on it. I only put on a coupld hundred a year.