The strongest Jap four, with lots of roller bearings and gear primary drive. Stable, safe handling but excess mass. Alternator and rectifier (use Superdream items) burn out. Top end eventually goes after 75k. Engine should be smooth and clean running. Exhaust and caliper rot endemic to the breed. Katana version looks flash, does 60mpg but lacks comfort. Custom version handles strangely above 70mph. Expensive on consumables but very tough.
1977-85, 549cc DOHC four, 54hp, 110mph, 50mpg, 450lb