Panda
Check out these PEI websites,
www.motorcyclepei.com,
www.angelfire.com/pe/peimtc/
July and August are good times to visit as all the tourist attractions are open for business, September can be great if you're here for scenery and peace and quiet. June tends to be our rainy season and weather is unpredictable. There is one major rally the "Island Rally" each labour day weekend as well as assorted rides throughout the summer.
Here's a link to an AMA story on a Maritime tour.
http://home.ama-cycle.org/membersonly/magazine/story_dl.asp?id=431
Rick