Sputhe Engineering Parts & Accessories

Sputhe Engineering invented the five-speed transmission that drops into a four-speed Big Twin frame — a genuine before-and-after for anyone running a 1970-on Harley who wanted modern gearing without changing the rest of the bike. They also build the only aftermarket five-speed-with-reverse and the only one-piece mainshaft kick-starter on the market.

Andrews gears and mainshafts as standard, all-American parts, twenty-eight-plus years of supplying the Big Twin restoration and chopper crowd. The kind of catalogue you only really need once, but when you need it, nobody else has the part.