Fun stroker twins for the first 25000 miles, poor build quality lets it down. Cranks, carbs, exhaust and mono-shock can give trouble. Engines can seize, free up again and appear to run fine. Wriggles and weaves at speed, especially when tuned or suspension worn. Possible to tune the engine for 120mph when it turns in 20mpg. Lots of cheap tuning bits; many engines finicky, compounded by quick wear carbs. 350 better buy.
1980-85, 249/347cc w/c t/s twin, 35/45hp, 100/110mph, 40/35mpg,