1980 Horsepower Hints for Harley-Davidson Sportster and Yamaha 650

Cover: Robison Industries Thunderheads mated to the Harley-Davidson Sportster engine; Custom Reports: Suzuki GS850L; Kawasaki KZ1000 Z1-R; Special Section: Vetter on Styling - advice for home customizers plus taking the mystery out of the Mystery Ship; Speed: Yamaha 650 -updating your twin for more oomph in the tight spots; Harley-Davidson Sportster - making a bike that lives forever live faster; Chrome-Plating Buyers Guide; The Custom Files: Highway 61 revisited -a second look at a first rate Harley; more

GS850-L GS-850 KZ-1000 Z1R

1980 July Custom Rider Motorcycle Magazine Back-Issue available at www.DadsVintageAds.com