Consistent long-term performance, even in intensive use or demanding environments.

Specific cut-outs prevent the accumulation of mud, sand or grit, which extends transmission life and reduces premature wear.

Perfect fit thanks to meticulous machining for easy assembly.

Forged and precision-machined for superior durability and wear resistance.

Optimized power transfer thanks to JT's advanced hardening process.

Provides superior hardness, up to six times longer service life than a 7075-T6 aluminum crown.

Much lighter than a steel crown, which reduces unsprung mass and improves the bike's responsiveness.

Designed for many Kawasaki and Suzuki models, including RMX 450 Z (2010-2017) and DR 250 S (years 1979-2026).

Induction-hardened, high-carbon steel outer ring → up to 6 times longer service life than a conventional 7075-T6 aluminum ring.

Increases mechanical strength and reduces surface tension, improving durability

Allows original replacement or modification of gear ratios to adapt engine behavior (acceleration vs. top speed).

Heat treatment and bead-blasting to reduce surface tension and improve durability.