Mark,
Check out the Motorcycling Amateur Radio Clud (MARC) website:
www.marc-hq.org
MARC members -- P Shivers is one -- have installed hundreds of amateur radios on their motorcycles. Everything from a 2M HT to full-blown HF rigs with "screwdriver" antenna...!
Lots of good info on the website. Some how-to articles also. I *assume* that you have a Wing, probably a GL-1800. These are one of the better motors for Ham Radio. Kennedy Technology
www.cellset.com makes plug-N-Play "black boxes" that connect into the Intercom and allow a standard helmet headset to TX and TX from/to the helmet.
If you are really serious about using it often while riding, then I suggest that you use a separate PTT under the left handlebar near the left thumb.
An external antenna will perform much better that the rubber-duck common to HTs.
J & M in Tucson AZ
www.jmcorp.com also makes a "hip pack" that integrates a bunch of devices into the headset -- the catch here is that it has to be a J & M headset...! The other catch is that you don't want to mention Ham anything. If you talk to them you've got a Kenwood "Free-talk" FRS/GMRS radio...!
Good Luck...!