Found on eBay: 1981 Kawasaki GPz550 - Motorcycle Classics | Exciting and evocative articles and photographs of the most brilliant, unusual and popular motorcycles ever made!
Kawasaki Z550 GP
1982 Kawasaki GPZ550 - YouTube
Retro Revamped - OSG Kawasaki GPZ550 | Return of the Cafe Racers
Kawasaki Z500/Z550 - Wikipedia
Kawasaki GPZ550
No Reserve: 1985 Kawasaki GPZ550 for sale on BaT Auctions - sold for $2,500 on February 5, 2019 (Lot #16,065) | Bring a Trailer
The Kawasaki GPz550 Launched the Middleweight Revolution | Cycle World