BOLD MAGENTA part numbers are new for 2024 BELTS, CHAINS & SPROCKETS PARTS-UNLIMITED.COM ATV/UTV | 2024 683 STANDARD (M) •Heat-treated medium carbon alloy steel construction •All components heat-treated and shot-peened for maximum strength •Four-point pin riveting and solid rollers •Chains include clip connecting link SEALED UW-RING (MXU) •The lightest sealed-ring MX chain on the market •Designed for the professional motocross racer •Consistent power delivery with an extended chain life •Ideal for race applications between 125-500cc •Chains include clip connecting link HEAVY DUTY (MXZ/4) •These lightweight chains are developed from advanced alloy materials and manufacturing technology •Feature chromoly steel construction with seamless rollers and bushings, and all components are heat-treated using RK’s exclusive HIT (Heat Induction Transfer) process • Moderately priced, 420 MXZ chains are the strongest in their class, giving you the best value-performance rating of any MX chain in the world today •Up to 150cc applications •Chains include clip connecting link XW-RING (EXW) • High-speed, extreme heat performance chains that can handle large cc motors •Suitable for up to 750cc off-road motorcycles •Chains include clip connecting link SIZE AND TYPE WEAR LIFE INDEX AVERAGE TENSILE STRENGTH (LB.) MAXIMUM ENGINE CC STREET/DIRT 520 Std. 100 6,800 250/250 530 Std. 100 6,800 400/NA GB 420 MXZ 200 5,000 150/150 GB 428 MXZ1 200 6,070 125/125 SIZE AND TYPE WEAR LIFE INDEX AVERAGE TENSILE STRENGTH (LB.) MAXIMUM ENGINE CC STREET/DIRT GB 520 MXZ5 300 8,500 NA/500 GB 520 MXU 600 8,000 NA/500 520 EXW, GB 520 EXW 1,000 7,700 750 FEATURES All RK chains are pre-stressed and pre-stretched to ensure equal load distribution and minimal maintenance.They’re made of the highest-grade medium carbon alloy steel available, with all components shot peened and heat treated. 520 EXW CONNECTING LINK DESCRIPTION PART # SUG. RETAIL Clip connecting link R18-520EXW $8.93 520 EXW – CUT-TO-LENGTH NO. OF LINKS PART # SUG. RETAIL 100 RK520EXW-100 $99.65 110 RK520EXW-110 109.62 NO. OF LINKS PART # SUG. RETAIL 120 RK520EXW-120 $119.57 GB 420 MXZ (GOLD COLOR) - CUT-TO-LENGTH OR BULK NO. OF LINKS PART # SUG. RETAIL 82 RK420MXZ82 $29.30 100 RK420MXZ100 35.73 104 RK420MXZ104 37.17 110 RK420MXZ110 39.30 114 RK420MXZ114 40.73 118 RK420MXZ118 42.18 NO. OF LINKS PART # SUG. RETAIL 120 RK420MXZ120 $42.90 124 RK420MXZ124 44.30 126 RK420MXZ126 45.02 130 RK420MXZ130 46.47 132 RK420MXZ132 47.18 GB 420 MXZ CONNECTING LINK DESCRIPTION PART # SUG. RETAIL Gold clip connecting link R18422MXZ $2.62 GB 520 EXW (GOLD COLOR) – CUT-TO-LENGTH NO. OF LINKS PART # SUG. RETAIL 100 GB520EXW-100 $109.93 110 GB520EXW-110 120.92 NO. OF LINKS PART # SUG. RETAIL 120 GB520EXW-120 $131.93 GB 520 MXU (GOLD COLOR) - CUT-TO-LENGTH NO. OF LINKS PART # SUG. RETAIL 110 1222-0190 $134.03 114 1222-0192 138.88 116 1222-0193 141.33 120 1222-0194 146.22 CONNECTING LINK Clip connecting link 1225-0144 9.48 GB520 EXW CONNECTING LINK DESCRIPTION PART # SUG. RETAIL Gold clip connecting link R18-GB520EXW $8.93 Gold rivet connecting link R18-GB521EXW 8.93 M520 – CUT-TO-LENGTH NUMBER OF LINKS PART # SUG. RETAIL 82 RKM52082 $20.18 84 RKM52084 20.67 86 RKM52086 21.16 90 RKM52090 22.14 NUMBER OF LINKS PART # SUG. RETAIL 92 RKM52092 $22.64 98 RKM52098 24.11 130 RKM520130 31.99 25’ roll (cut-to-length) R18-M521 118.10 M530 – CUT-TO-LENGTH NO. OF LINKS PART # SUG. RETAIL 118 RKM530118 $29.03 HOW TO ORDER RK chain is available cut-to-length or in bulk. Precut lengths are individually boxed with a clip-type connecting link, and all bulk rolls include clip-type connecting links.When ordering precut lengths, the number of links is indicated at the end of the PART # (example: PART #RKM52082 for a 520 Standard chain with 82 links).
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