Alternatives and additions found:
YAMAHA - "Yahoo!", Agressive Motorcyclist Arse Hat Alert!
HARLEY DAVIDSON
Hogs Are Really Expensive, Your Dollars Are Very Irresponsibly Disbursed, Spent On Nonsense
SOFTTAIL
Soft Or Fluffy? Tell The Truth And I'll Laugh
LOW RIDER
Loud Old Wacko Rides Irresponsibly Down Entire Road
AMC
Almost Mechanically Caustic
BIG DOG
Barely Ingenious, Gonna Drop On Ground
WEST COAST CHOPPERS
Why Everyone's Still Too Cool, Obviously, As Seen Televised Constantly, Harley Ownin' Pediatricians Pervade Everyone's Ridin' Space
HONDA
Happy Owners, Nice - Deviceful Advertising!
GOLDWING
Get On, Load Dingy Wife, Irritate Normal Guys
KAWASAKI
Kick And Whack And Slam - Aren't Kawi's Indestructible?
SUZUKI
Slow Until Zooming Under Kids' Influence
YAMAHA
You And Me Ain't Harley Admirers
DUCATI
Developed Ulcer Considering Affording This Item
CAGIVA
Can't Afford, Get It Via "Aquisition"
BMW
British Made Wreckage
TRIUMPH
Totally Ripping It Up, Making Police Hurry
NORTON
Nice Old Ride, The Owner's Nuts
EXCELSIOR HENDERSON
Even X-Champions Expect Loose Screws, I Only Ride Her Extreemly Near Distances, Even Rain Spooks Owners' Nerves
BSA
Bruises, Sprains Assured
BENELLI
British Engineers Never Even Learned Little Italian
MOTO GUZZI
Machine Owned To Only Goof Up, Zig-Zag, Irritate
URAL
Unless Russians Are Loners
ROYAL ENFIELD
Rich Old Yanks All Love, Even Nuts Feel It's England's Lowest Development
KTM
Killed The Maico
MAICO
Malfunctions, Awfuly Irritating, Constant Obstacles
BULTACO
Bettter Understood Largely Throughout Ancient Civilizations Only
INDIAN
Irresponsible Nutjobs Devised Illogical Alliance Nevertheless
BUELL
Boring Until Engineers Lighten Load
VICTORY
Very Impressive, Cool To Old Riding Yokels
HODAKA
How Often Does A Kid Aquire?
HUSQVARNA
Horribly Ugly, Something Quite Vicious About Riders, Not Advised
DUKE
Don't Underestimate Kooky Engineering!