I want to mount up bigger wheels

This is not a common process and certainly is not plug and play. Motorcycle wheels don't easily interchange like car wheels. This is usually only done by racers who are looking for wider wheels so they can run radial tires.

Anyone interested in going to 17" wheels for a better selection of rubber should get a set of 16" wheels welded up by Kosman. This will change the wheel sizes to 3.25-17" front and 4.50-17" rear, which will fit 150-width radial tires out back and 110 on the front. This runs about $1200, and then you'll want to run better, more expensive tires, too.

Unless you're going to race it's not worth it. Even if you are going to race, it's still probably not worth it. :-)

Kosman wheels at left, stockers right.