KTM 640 Duke Motorcycle - Street (1998-2006)

The KTM 640 Duke, primarily known as the 640 Duke II during its 1998 to 2006 model years, is a distinctive liquid-cooled, single-cylinder, four-stroke motorcycle powered by the robust LC4 engine. With a displacement of approximately 625 cc, this engine typically delivered between 53.6 and 55 horsepower at 6750-7000 rpm, alongside 60 Nm of torque at 5500 rpm. The main trim offered was the KTM 640 Duke II, with a Limited Edition appearing towards the end of its production run, notably in 2006. The transition from the earlier Duke I (pre-1998, 610cc) to the Duke II marked a significant evolution, introducing the larger 625cc engine. Throughout the 1998-2006 period, the 640 Duke II consistently used a Mikuni BST 40 carburetor, distinguishing it from later fuel-injected LC4 generations. This generation also saw styling updates, including sharper body lines, BBS cast-alloy wheels, and a 43mm WP inverted fork, enhancing its performance and aesthetics. A gear-driven counterbalancer was also integrated into the engine to reduce vibrations. Q: How do I ensure I select the correct parts for my KTM 640 Duke?

A: To guarantee compatibility, please use our year and edition selector at the top of the page. This will filter parts specifically for your motorcycle's model year.

Maintenance