Quick Stats

1973-76, 903cc DOHC four, 83hp 130mph 50mpg 550lb

What to Expect

Immensely strong but heavy four with dubious handling, although most now have upgraded suspension and brakes (Z1’s disc crap). Engine tough, runs for 75 to 100,000 miles; clutch, gearbox and camchain most likely to go. Unlike smaller Z fours, has roller bearing crankshaft and gear primary drive. Make sure that 4-1 exhausts are matched with jetted carbs, otherwise pistons and valves melt. Immaculate Z1’s fetch serious money but chassis modded Z900’s make much more sense