Back to the Future: 1983 Honda CX650 Turbo

Dean Stuckmann has four Honda turbos – two 500s and two 650s – and this perfect Honda CX650 is the nicest of the bunch.


1983 Honda CX650TEngine: Turbocharged 674cc OHV liquid-cooled transverse 80-degree V-twin, 82.5mm x 63mm bore and stroke, 7.8:1 compression ratio, 16.4psi max boost, 100hp @ 8,000rpm
Top speed: 139mph (period test)
Fueling: Computerized fuel injection
Transmission: 5-speed, shaft drive
Electrics: 12v, electronic ignition
Frame/wheelbase: Backbone-type with engine as a stressed member, round/box-section mild steel/58.9in (1,495mm)
Suspension: Showa air-adjustable fork with adjustable TRAC anti-dive front, Honda Pro-Link with Showa single shock w/adjustable air pressure and rebound dampening rear
Brakes: Dual 10.9in (276mm) discs front, single 10.9in (276mm) disc rear
Tires: 100/90 x 18in front, 120/90 x 17in rear
Weight (wet): 571lb (259kg)
Seat height: 31.1in (790mm)
Fuel capacity/MPG: 5.3gal (20ltr)/40-50mpg (est.)
Price then/now: $4,998/$4,000-$6,000


A visitor to Dean Stuckmann’s home in Newton, Wisconsin, would be whisked back to the early 1980s.

At the time, new technologies were launching that changed the way people watched movies and listened to music, and Dean appreciated new technologies such as the Sony Betamax videocassette player and Pioneer LaserDisc player. He still has both of them, set up and functioning, in his home entertainment system.


“I’ve always really been into new technology,” Dean says of his early-adopter status, and that passion carries over to his interest in motorcycles. He continues: “Early in 1981, when motorcycle magazines began running stories about the first Honda CX500 Turbo, I thought the bike was really something special. I went to my dealer, Wickman’s Cycle Service in Manitowoc, so I could be the first to get one.” Dean traded his Honda CB750F and put money down on a brand-new 1982 CX500 Turbo – sight unseen. Part of the deal included the dealer’s wall poster and sales materials, pieces of ephemera Dean continues to maintain in his personal collection. Almost four decades and 77,000 miles later, he’s also still got that CX500 Turbo. But that machine was really just a gateway to his ultimate Honda – the rare 1983 CX650 Turbo.

9/10/2020 2:32:55 PM

CX turbo's were an oddity and few were sold at our dealership, so none of our mechanics were trained to work on them, including me. A customer brought in a CX-500 turbo that had no boost power. It ran like a standard CX-500 and the other mechanics couldn't figure it out so they gave it to me (the electrical guru), because they figured it had an ignition problem. I checked the valve adjustment again, put in a second set of plugs, checked ignition timing, tried new igniters, fresh gas and nothing worked. So I started closely examining the boost system. Know what I found? There was a (drain?) bolt hidden at the bottom of the boost chamber that had fallen out so the turbo's pressurized air went nowhere. Probably wasn't tightened at the factory and just eventually fell out.

2/7/2019 7:11:46 PM

always thought the CX650 Turbo was cool (although, as car guys have learned, going with a smaller turbo gets rid of lag) and a major tech showcase, but it only takes removal of 4 phillips head cover screws and 4 stator mounting bolts to replace a stator on my one of my Moto Guzzis.

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