Quick Stats

1979-84, 499/553cc DOHC four 50/56hp 110/115mph 50mpg

What to Expect

Underdeveloped four broke camchains, tensioners at low mileages – post ’81 better. Fitting 550 bits helps. Gutless engine, most flogged to early death, and fast corroding chassis turned into a giant pogo-stick at speed. GPz mill fits.