An interesting article about Prince's custom-made motorbike posted earlier on Neon Rendez Vous, tumblr, http://neonrendezvous.tum...1760977944
A similar article was also originally posted on Maxim.com on April 22, 2016: http://www.maxim.com/ride...ide-2016-4
There is another good article about it here too.

"One of the most enduring images of Prince is the Purple Rain album cover and movie poster showing him astride a purple motorcycle. With billowing smoke, dramatic backlighting and heroic upward angle, Prince and his tricked-out ride make for a truly indelible image.

Prince rode a motorcycle as diminutive as the musical icon himself -the bike was actually a customized 1981 Honda CM400 twin-cylinder starter bike that was notable for its low seat height and its automatic two-speed transmission that absolved His Purpleness of having to squeeze a clutch lever.

He kitted out the bike with a classic '70s Vetter Windjammer fairing and a seat with pink velour inserts. Most motorcyclists would be dismissive of such a small-scaled machine, but Prince’s ride fit the five-foot-two pop god perfectly.

Honda’s advertisements from the time touted the low, 30-inch seat height and the ability of even short riders to stand confidently flat-footed rather than on tip-toes. Certainly it would have detracted from Prince’s imperious appearance in the Purple Rain photo if he’d appeared in danger of toppling over. As it stands, it just might be one of the most memorable pop culture motorcycle photos of all time.

Depending whom you ask, two or three bikes were used for the film. One belonged to Prince; the other, or others, were replicas used by stunt riders for the more daring sequences. Next time you see Purple Rain, watch the not-Lake Minnetonka scene and look closely at the motorcycle tires — you’ll see how the tire changes from street to off-road tread.

Prince kept his motorcycle and used it again in Graffiti Bridge, his 1990 sequel to Purple Rain. His bike retained its Vetter fairing, but was repainted black and some of its chrome pieces were gold-plated. After Graffiti Bridge, the motorcycle was retired to his Paisley Park estate. The Hondamatic line was not so lucky. Honda produced the 400cc version from 1978 to 1981. Other engine sizes were offered in different years, but sales were poor, and Hondamatics were discontinued after 1983."

Photo: www.instagram.com/apollonia_kotero






Photo Maxim.com, http://www.maxim.com/ride...ide-2016-4

Photo: Maxim.com, http://www.maxim.com/ride...ide-2016-4

We are talkin' 'bout it over here: http://prince.org/msg/7/433355

You should add your links over there. It's specifically discussed that there were three bikes in the movie, which one was repainted for GB, etc.