i had mentioned something similar with my zx.. i was WOT(hella revs..lol) going downhill and poof......just silence, let off and away we go again.. (seemed like when you let off and she "caught back up" alls fine). i was associating that with a rev limiter but like i would know
(it had done it on several different occasions) but shes not done it in awhile. now i can go down the same hill at 3/4 throttle and STILL have a better top speed by a easy 5mph.
so maybe it was fuel related.
even tho i still have the weak ass 14mm carb ........