Yamaha R6 or Honda Shadow 750?

First find out what kinda two wheeler you are. Do you want to really go fast and feel like you are on a race track? If so-R6 is your bike. If you are a laid back type guy and just like cruising...Honda is you bike.

I know me, I always have liked sportbikes ( gssxrs, ninjas, r1- r6 etc.) i would never be comfortable with a cruiser as my only bike. On the other hand, I know guys that totally despise sportbikes. A r6 is a good starter bike in the sportbike category, but they are very fast, so don't try to stunt or underestimate it. Ride with caution, always wear a lid, and keep it on two wheels!!!

How much experience do you have riding motorcycles on the road? I'm assuming little if none. If that's the case, you'll probably end up killing yourself on the R6. The R6 will also be much more expensive to insure. Ride the Shadow to learn and then in a couple years you can switch to a rice rocket if you still want.

Your dad is probably concerned you'll kill yourself on the R6. Granted you can kill yourself on roller skates. The R6 is a much more powerful bike than the Honda. However you can have alot of fun on the Honda without going 150mph. I just don't care for the ergonomics of the R6. I like to be comfortable when I ride.

Get the one that makes you happy though. Your the one that's going to be riding it.

To say you have outgrown a bike should refer to engine size as well as frame size. A 250 Rebel is small in frame and power but is a great platform for beginning rider. That little 250 will get you around for several months while you learn basics of motorcycle riding, handling and dealing with traffic and weather. After that stepping up to a 750 will be a big step up but totally doable for a competent rider. A 500cc Shadow or Virago would be okay too and save some cost.

Id say niether. The R6 is too radical, and the Shadow is lame. Have you heard of the Honda Magna? Its a nimble, sporty, pretty fast cruiser. You may look into that as a compromise. Or if you really really want a 600 sportbike, look into the CBR600F or Kawasaki ZZR600. They are more tourquey, comfy and generally more steet oriented than the R6 but still very very sporty.

take the honda - over time you will be much happier with it