The 900SS stripped of its bodywork and given sexy naked styling proved a gamechanger, and has been built in sizes from 600cc to 1200cc. Aftermarket parts? Thousands. Carbon this, stainless that, anodised the other, and more red bits than a Costa del Sol beach. Termignoni pipes are almost compulsory and are the quickest way to liberate horsepower. Latest ones are the best performers; early 900s are a bit tired now. The air-cooled models still look the best and are way cheaper to run. The 600/620 is cheapest, and the best way into Ducatis with little financial risk.
What you’ll pay now £1000£9000. We’d go for an injected 796. But should you? No naked bike is as cool.