BASIC INSTINCT
The iron Sportster engine is not difficult to work on if you have UNC/UNF tools, but can reveal nasty surprises when stripped. The simple, sturdy design means it will keep running even when it’s worn out.
“Sportsters were often owned by people who couldn’t afford a bigger Harley so an engine may have been owned by several people who didn’t spend much on it,” says Matt Neal, a former aviation engineer who specialises in H-DS.
“Failure of the roller big end is a typical problem; prolonged abuse can break third gear. The earlier a problem is dealt with, the smaller the repair bill.”
With loads of raw character, the Sportster is increasingly sought-after, especially in pre-1980 form. Expect to pay about £2500 for one in need of attention, up to £6000 for a sound original example.