Models
At least thirteen major models were produced.
- 11U European model - available in unfaired, or fully vaired variants (XZ550S) with many minor regional differences
- 16R Australasian model - available unfaired, with sales promotion full or bikini fairings. Marketed as XZ550R
- 11V German model - a 50PS low power version
- 11H USA/Canada model - 1982
- 11J USA/Canada model - 1982
- 11K USA/Canada model - 1983
- 28V USA/Canada model - 1983
- 28W USA/Canada model - 1983
- 30R Japanese model - unfaired
- 25R Japanese model - fully faired. Marketed as XZ550D
- 14R Japanese model - a 400 cc version unfaired
- ??? Japanese model - a 400 cc version with sport fairing. Marketed as "Air Current"
- 24R Japanese model - a 400 cc version fully faired. Marketed as XZ400D
Major differences between models included Single / Dual front disc brakes, Suspension, Air box, Carburettor (BD34, BD36), Paint schemes and branding (the XZ550 is branded as Vision in the US). As well as the full fairing, a smaller sport fairing was available, and offered as a purchase incentive for unfaired variants.
The 400 cc version was sold from 1983 to 1987 and is visually almost identical to the 550, although it has sightly different height, width, length and weight specifications. It was sold in full faired, half faired and naked versions. The XZ400 was sold into non-U.S. markets (including Europe, Japan, Australia and New Zealand). The most obvious differences other than engine capacity were slotted disc brake rotors, and a strap on the seat. Most parts are interchangeable, although the 400 had a different bore and stroke, valve sizes making engine part swaps difficult.
Three different gear ratios exist for the European/Australasian, US and Japanese markets. These are relatively easily swapped between models, allowing rides to select between lower-revving touring style riding, and faster acceleration.
Read more about this topic: Yamaha XZ 550
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