RK RACING GB520MXZ4 The GB520MXZ4 chain features chromoly steel construction with seamless rollers and bushings and oversized special alloy pins for added strength. DETAILS: All components are heat-treated using RK’s exclusive Heat Induction Transfer process. The MXZ4 has a maximum tensile strength rated at 9000 pounds and can handle any motocross race application from 125 to 500cc. It was designed for racing. TYPE: Non-O-ring chain. WEIGHT: 3. 7 lb. RETAIL PRICE: $104.83 (gold, shown), $87.07 (non-gold), $120.17 (colors). CONTACT: (760) 732-3161 or www.rkexcelamerica.com.
RK RACING GB520MXU The MXU is one of the lightest sealed-ring motocross chains available and features RK’s UW- sealing rings. DETAILS: MXU’s ultra-thin UW seal is perfect for bikes with case clearance issues, and the small seal contact virtually eliminates drag. MXU chain-life expectancy is more than double that of a non-sealed chain. All components are heat-treated using RK’s exclusive Heat Induction Transfer process. Maximum tensile strength is rated at 9000 foot-pounds. TYPE: O-ring chain. WEIGHT: 3. 65 lb. RETAIL PRICE: $124.15. CONTACT: (760) 732-3161 or www.rkexcelamerica.com.
SUNSTAR 520MXR1 The 520MXR1 has extra-deep, gold inner and outer side plates with a superlight design that weighs just under 3. 6 pounds per 120 links. DETAILS: Constructed of 100- percent heat-treated components for strength and reliability, this chain is built to handle the demands of the fastest racers in the world. The MXR1 has a tensile strength of 9000 pounds. The chain is available in a gold color option with a clip-type master link in precut lengths of 116 and 120 links. TYPE: Non-O-ring chain. WEIGHT: 3. 65 lb. RETAIL PRICE: $97.95. CONTACT: www.sunstar-mc.com or your local dealer.