TXX Interceptor: A custom Royal Enfield 650 from Thrive

The new Royal Enfield twins are a godsend for custom builders. By modern standards, they are simple on both the mechanical and electrical fronts: you don’t need a degree in Electrical Science from MIT to change the instrument panel. They’re also affordable. In the US, prices for the Interceptor start at a mere $5,799, which is well over $3,000 less than a Sportster Iron 883 or Triumph Street Twin. There’s also a lot to be said for starting with a new rather than used motorcycle—because you’re not dealing with tired or worn-out parts and hidden nasties. A late-model R-series BMW...