Make sure if you purchase the ER6, it has gone through Kawasaki Health Check (Valve). Many members screwed up their engine before even the Kawasaki Health Check because of the low quality valve used in ER6 model.

I have been ridding the ER6 for few months before changing to Z800.

Actually it depends, if your going to get the bike for long term then go for Z800. But if you want something small and want to upgrade in 1-2 years time then get the ER6 first.

The power deliver in ER6 is more than enough actually but if you prefer a 4 inline sound plus rough look of the bike, go for Z800.

Just went in for service. Changed my oil to IPONE Fully Synthetic (3 + 1/2 bottle), K&N Oil Filter & K&N Air Filter. The engine was way smoother and better.

Good luck in getting your bike

Thanks