There's a guy on another board with an ileostomy who rides a sports bike and is leant over the tank most of the time. He wrote " i had a cbr600f at the time and my dream bike was a 2003 blade which i couldnt afford as i was off work, so i sold the 600 and got a 2000 blade 2 months after my op, and 8 months later i got my 03 blue/black blade".
Good luck - your ileostomy shouldn't stop you from doing anything - only your mind will!
I have had an ileostomy for 30 years now due to UC.
I'm not a complete idiot - some parts of me are missing!