137ZRT/015 | REGINA CHAIN | CHAIN 137ZRT 118 LKS W/CONN. LINK + OUTER LK BOXED GSX8R For the last two decades

For the last two decades bikes have been equipped with an exhaust flap valve (also called as EXUP valve) to improve low down torque with the hindering of the flow of escaping gasses creating back pressure in the exhaust system

Triumph Tiger 1200XR 2018

Yamaha Tracer 900GT 2020

With its lightweight construction and modern styling

Suzuki DL1000 V-Strom 2008

137ZRT/015 | REGINA CHAIN | CHAIN 137ZRT 118 LKS W/CONN. LINK + OUTER LK BOXED GSX8R For the last two decades137ZRT 015 REGINA CHAIN CHAIN 137ZRT 118 LKS W CONN. LINK + OUTER LK BOXED Description: Regina 137ZRT Premium Drive Chain 525 Pitch 118 Links Includes Connecting Link and Outer Link Plate Patented Z Ring sealing technology for reduced friction and maximum durability Designed for high performance sport, touring, naked, and superbike motorcycles High carbon alloy steel construction with shot peened components Quad riveted pin design for superior tensile