JT SPROCKETS Countershaft Sprocket - 18 Tooth - Triumph JTF1184.18

A worn or damaged countershaft sprocket directly impacts your Triumph's power delivery, throttle response, and overall drivetrain efficiency. This JT Sprockets replacement restores factory-spec engagement with your primary chain, eliminating slack and ensuring consistent gear ratio performance. Whether you're rebuilding after high-mileage wear or upgrading for reliability, this 18-tooth sprocket is a critical maintenance component that demands precision manufacturing—which is exactly what JT delivers.

JT Sprockets has built their reputation on CNC-precision manufacturing and material science. This countershaft sprocket is cut from SCM420 chromoly steel, a high-strength alloy that resists wear and maintains tooth profile integrity even under sustained engine load. The result is smooth chain engagement, reduced noise, and extended sprocket life compared to standard alternatives.

• 18-tooth countershaft sprocket
• SCM420 chromoly steel alloy
• Triumph-specific fitment
• CNC-manufactured precision
• Bolt-on installation
• OEM replacement quality
• High wear resistance
• Factory-spec tooth profile