I'm not sure exactly how to describe my problem but i'll try my hardest. Just got home from doing the Choc Mill group ride (which was great by the way) All day my bike ran fine, no issues as far as i could tell till it came time for the trip home. on the freeway in 5th & 6th after i went over about 9k RPM the bike would all of a sudden rev up into the high rpm's but that power didnt feel like it was getting transferred to the road but if i let off the throttle or just held it for a few seconds it would drop back to about 9k rpm and continue like normal. Also as i was getting closer to home and was going slower speeds i was having to rev the bike extra hard to get the same amount of performance i was getting just riding it normally earlier today & i managed to get it stuck in neutral a few times as i got near home i don't know weather that was me or the gear box though. Sorry i can't be more technical but it was hard to describe what the bike was doing. I'll take it for another ride tommorow & see if the issue persists. Bike is a 1998 Kawasaki GPX & it had only been serviced about 4 weeks ago.