Is an M8 Big Bore Kit Actually Worth the Money?

Deciding to pull the trigger on an m8 big bore kit is probably one of the most exciting moves you can make for your Harley-Davidson. If you've been riding a Milwaukee-Eight for a while, you already know it's a solid engine with plenty of smooth power, but there's always that little voice in the back of your head wondering what would happen if you gave it more "grunt." The M8 platform is arguably the best canvas Harley has ever produced for performance upgrades, and going big with the displacement is the fastest way to turn a touring bike into a street-shredding monster. ...

April 23, 2026 · 7 min · Forrest Didem