gettin' older? needin' more than two wheels ta stay up?

Harley Davidson                      Honda                         Kawasaki
                              Victory                         Triumph
Suzuki                                    Yamaha                          Stallion?

Check out the "Motor Trike Site"  
Link at bottom of page
Conversion kits for just about any motorcycle, 

Harley: 
  FL Series: Electra Glide, UC Electra Glide, Street Glide, Road Glide, and Road King.  1987 to current.
Sportster: both 883 and 1200 2004-current.
V-Rod: All years
Softail Series: 1995 - current most models except Springer.

Honda:
F68 Raptor
GL 1800 2001-current
GL 1500 1988-2000
VTX Series, Valkyrie,Interstate, 750 Shadow, 1100 Sabre

Victory:
Cross Country, Cross Roads, Hardball, and Kingpin

Kawasaki: Vulcan 900, 1700, 2000
Triumph Rocket Three
Suzuki: Burgman
Yamaha: Roadliner, Stratoliner,RoadStar

Stallion: Stallion?  

Stallion...

http://www.motortrike.com/TrikeAllTrikes.aspx