I had posted previously regarding this very topic but realize it was on the site that mysteriously crashed, so here goes. I have an 08 in the fastest color. Mods are, full 2008 ZX14 exhaust with collector cats removed, K&N filter, PCIII USB with Dynojet tune, flies removed. I have the Kawasaki larger windshield and I'm running PR2's. Fully clothed I weigh in at an impressive 262lbs
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Prior to mods best I got top speed was 156 with bags on, verified by Garmin zumo 550, which itself has been compared to radar readings from the po po. I had the bags on and forget about 6th gear had to run through 5th, she actually slowed down in 6th. She had a little more to go, maybe a mile per hour or two but started to run out of room.
Since the mods she's seen 164, again verified by the Garmin and with the bags on. She still had another mile per hour or two but I was satisfied. She was very stable each time. I will do a bagless run to see the difference.