I'm not going to argue with orcyclist, since he backs up his opinion with been-there knowledge. I'll simply say that if it's just the riding you're after, I'd listen to him. But if you're into history, the situation he describes is just the reverse - the vast majority of the interesting stuff (first important settlements, Revolution, Civil War) happened in the East.
I do hope you at least spend SOME time in the East, especially the Northeast. You simply can't miss the Niagara Falls region. See Old Fort Niagara at the mouth of the Niagara River where it flows into Lake Ontario - an 18th century French fortification in a beautiful spot. Then head down the road to Goat Island in Niagara Falls, where you can walk right close to the edge of the Falls. Cross the Rainbow Bridge into Canada and enjoy the sightseeing on the Canadian side - a jet-boat ride down the Gorge, the Maid of the Mist to the very foot of the Falls, the Cave of the Winds at the base. Rent a bicycle and pedal up the Niagara Recreational trail back up to Lake Ontario and the town of Niagara-on-the-Lake - if you're in decent shape, the ride up and back will take two or three hours and you'll be pedaling along what Winston Churchill called "the prettiest Sunday drive in the world." If you don't want to pedal it, just ride the accompanying road on your motorcycle. They're parallel. The bicycle trail can be hard to follow through one town section (I forgot the name of the town), but the locals are your fellow Commonwealthers, so they'll be happy to help. Oh, and it's great wine country, so have a taste at a vineyard. If you do decide to bicycle, you can leave your motorcycle parked on the American side, and walk across the bridge to Canada.
Also nice in the Northeast are the mansions of Newport, Rhode Island; the Lake Champlain-Hudson River Valley corridor in New York (more mansions, the French-and-Indian War Fort Ticonderoga, and Bear Mountain State Park, where motorcycle riders from NYC gather on weekends.) You could hit all of this stuff quickly on the way out West.