JT. 420HDR 420 Universal ChainRef : JTC01447A / 1077644013

JT DRIVE CHAIN 420 HDR – Heavy-duty transmission chain for small cylinders

Manufacturer reference: JTC420HDR140SL. The JT Drive 420 HDR chain is a Heavy-Duty solution designed for use on machines from 50 to 150 cm³. Made of black steel, it combines strength and ease of maintenance for urban riders, light cross enthusiasts, and compact roadsters.

• Type: 420 HDR Heavy Duty
• Pitch: 420
• Number of links: 140 (delivered ready to install)
• Weight: ≈ 0.74 kg / 100 links
• Roller diameter: 7.77 mm
• Pin length: 15.05 mm
• Plate thickness: 1.6 mm (inner/outer)
• Closure: clip
• Material / color: black steel

• Heavy-Duty construction providing tensile strength suitable for small displacements.
• Easy installation and maintenance thanks to the clip closure.
• Versatile: suitable for road, dual-purpose, and light motocross up to 150 cm³.

Common mounting examples: HONDA CRF 110 F (2026), RIEJU MRT 50 SM (2025), FANTIC XM 50 PERFORMANCE (2025). Before installation, check the spacing and length: an adjustment of the length may be necessary for perfect alignment of the sprocket/crown.