Change who you are to make her happy and there will be consequences.
Biz009 or anyone else for that matter... are NOT a motorcycle.
Now, there is a safer alternative... get a dirt-motor bike, and ride on terrain - that doesn't have CARS. It's called "compromise".
One of the things that make for a better / stronger marriage is that the two people merge themselves together. It does require BOTH people to make changes... they share and change aspects of themselves to be a unit. My wife and I do things together, that we both bring to the table. She is also into motorcycles - and for us to BE together, as my wife and mother of my son, she isn't allowed to be on a motorcycle on the street. While my father lost his limbs from being hit by a car, the injuries reduced his quality of life - you know, from the lack of limbs - it also cut short his lifespan. There are things you won't be able to do - or do easily with your wife or future kids if you are severely injured (loss of limbs, paralyzed - which means your penis doesn't work and you may be pooping into a bag, brain injuries).
I think motorcycles are beautiful machines. I love checking out what people do to them, the engineering and understand the thrill of them... you get to do 50~100+MPH on a highway that can almost feel like flying because you are exposed to the elements. Inches from the road. The feel of the motor between your legs and sometimes - the pressing of breasts on your back. I still get some elements of that on a bicycle going 25+ MPH, hell - it's thrilling to do 15mph on a bike path with trees all over the place. The most dangerous thing to a motorcyclist is other cars, then the hard concrete parts of the road and of course speed. I drove by a dead motorcyclist on the highway because he crashed into a concrete barrier at a turn... when a few minutes earlier - he blasted past me at about 125+MPH and I was doing 60. I made it to my destination that night, danced and got laid with my girlfriend. He - well, he had nothing. No thoughts or anything else since he was in a cooler being dead.
Time to look at logistics.
It's easy to lay down your motorcycle from your own actions. Even when at a stoplight. Or someone can rear-end you at a stoplight.
Ever had a very hard sneeze? In a car, not so dangerous - on a bike, that could cause you to have a spill.
Bugs in your teeth and hair.
When it rains - its not so fun to be on a motorcycle. Besides getting soaking wet, you have to be extra careful to NOT loose control of your bike. New wet roads are extra slippery for CARS and they are far worse for 2 wheeled vehicles.
Cargo space = very limited.
Baby carrier on a bike... nope.
Your passenger has to hold on to you for dear life. If in an accident - the passenger has you or some rail to HOLD on to. Sure it gets women juicy; the danger, the feeling of the engine and holding onto a man... they tend to die as well. I really hate seeing small children on the back of bikes. A bump can make them lose their grip and get injured.
In the end, it's your choice... you are gambling with your life, which will effect more people than just you. So good luck.