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DescriptionThe Dirt Tricks Yamaha Rear Sprocket was designed and patented by Dirt Tricks president and engineer Greg Burns in 2002, using his knowledge of aerospace steels, heat treatments, as well as FEA stress analysis. Being an expert desert racer, Greg became tired of changing aluminum sprockets...

All new KTM 85cc Zirconium rear sprocket now available ! DescriptionKTM 85cc Zirconium Sprocket Features:- 2 year wear guarantee:if you wear it out, we will replace it!- Chromoly steel is 2.5 times stronger than stainless steel- Machined to the tightest industry standards and tolerance- Zirconium pl...