ATV-UTV

MXZ GB420MXZ, GB428MXZ (and Non-Gold 420MXZ & 428MXZ) GB520MXZ (and Non-Gold 520MXZ) Available in Gold or non-Gold finish. 420 and 428 MXZ racing chains are the strongest in their class giving you the best value-performance rating of any MX Racing Chain in the world today! Made for the serious Motocross racer, GB520MXZ chains feature Chromoly steel construction with seamless rollers and bushings, and oversized special alloy pins for added strength. All components are heat treated using RK’s exclusive HIT (Heat Induction Transfer) process. With a maximum tensile strength rated at 8800 foot pounds, GB520MXZ is the strongest Motocross chain available for the professional level 125cc to 250cc.

Tensile strength Lbs (approx.)

Tensile strength Lbs (approx.)

Chain

Links

Color

CC Max. ST/Dirt

Chain

Links

Color

CC Max. ST/Dirt

420

520

520 - S40 Racing • Wear life index: 800 41-858

420 Economy Standard Made in Malasia • Wear life index: 100

GB520SHO Rivet Link

41-418 41-419 41-420 41-701

M420 M420 M420 M420

100L 110L 120L

4200 4200 4200

80/80 80/80 80/80

520 Economy Standard Made in Malaysia • Wear life index: 100

MXU GB520MXU UW-ring works Motocross chain

Clip Link

41-518 41-519 41-520 41-708

M520 M520 M520 M520

100L 110L 120L

6800 6800 6800

250/NA 250/NA 250/NA

The MXU utilizes RK’s advanced UW-ring for superior sealing and longetivity. The MXU was tested by the teams that race it both on track and on dyno. Real world testing proved that this chain is very durable and dyno testing proved that horsepower is maximized and lap times consistent. The MXU was built super narrow to run on almost any motorcycle and keep the weight to a minimum. This chain is super strong with all the specifications you expect from an RK racing chain, and the future will prove that RK has the sealed ring technology to run with non sealed racing chains most are accustomed to.

420MXZ Special Racing • Wear life index: 300

Clip Link

41-201 41-199 41-202 41-200 41-986 41-982 41-981 41-897 41-720

420MXZ 420MXZ 420MXZ 420MXZ 420MXZ 420MXZ 420MXZ 420MXZ 420MXZ

110L 110L 120L 120L 126L 130L 130L

5000 5000 5000 5000 5000 5000 5000

150/100 150/100 150/100 150/100 150/100 150/100 150/100

Gold

520SO Standard O Ring • Wear life index: 600

Gold

41-100 41-101 41-102 41-103 41-736

520SO 520SO 520SO 520SO 520SO

90L

7700 7700 7700 7700

400/400 400/400 400/400 400/400

100L 110L 120L

Gold

Clip Link Clip Link

Gold

Clip Link

428

520MXU Sealed Motocross racing chain UW Ring • Wear life index: N/A

428 Economy Standard Made in Malaysia • Wear life index: 100

XSO “RX” Ring Chains GB520XSO, GB525XSO, GB530XSO (And Non-Gold XSO) The affordable sealed performance chain for all Enduro, Cross-country, Street and ATV/Quad applications is now available with Gold inner and outer side plates. RK’s “RX-ring” technology offers less torsional friction and increased high-stress, high-speed performance. All “RX-ring” chains get their performance pedigree from RK’s leading edge Baja 1000 and Paris-Dakar dominating “XW-ring” chain design. “RX-ring” chains offer tremendous value plus true quality and performance for all but the most demanding high-performance applications.

41-111 41-112 41-113 41-735

520MXU 100L 520MXU 110L 520MXU 120L 520MXU Pin Link

Gold Gold Gold

9000 9000 9000

ND/500 ND/500 ND/500

41-429 41-430 41-431 41-702

M428 M428 M428 M428

110L 120L 136L

4500 4500 4500

125/80 125/80 125/80

Clip Link

520MXZ Special Racing • Wear life index: 300

428H Heavy-Duty Made in Malaysia • Wear life index: 200

41-241 41-238 41-997 41-242 41-239 41-243 41-240 41-730 41-724 41-269 41-304 41-973 41-270 41-305 41-989 41-271 41-306 41-727 41-801 41-737 41-809

520MXZ 520MXZ

100L 100L

8800 8800 8800 8800 8800 8800 8800

125/500 125/500 125/500 125/500 125/500 125/500 125/500

Gold Gold

GB520MXZ 114L

41-426 41-427 41-428 41-705

M428H M428H M428H M428H

110L 120L 136L

5400 5400 5400

200/NA 200/NA 200/NA

520MXZ 520MXZ 520MXZ 520MXZ 520MXZ 520MXZ

116L 116L 120L 120L

Gold

Clip Link

Gold

Clip Link Clip Link

Gold

428MXZ Special Racing • Wear life index: 300

GXW GB520GXW, GB525GXW, GB530GXW (And Non-Gold GXW) The RK “XW-ring” is oil and contaminant resistant, and the “XW” seal design is compression and distortion resistant to provide the ultimate in efficiency. The “XW-ring” eliminates the risk of seal failure on the highest performance machines and provides the user with a 50% longer wear life compared to standard O-ring chains. From FIM World GP’s to Paris-Dakar and the Baja 1000, RK “XW-ring” chains dominate the competition!

520XSO Performance RX Ring • Wear life index: 750

41-210 41-213 41-985 41-212 41-209 41-214 41-983 41-984 41-215 41-211 41-898 41-721

428MXZ 428MXZ 428MXZ 428MXZ 428MXZ 428MXZ 428MXZ 428MXZ 428MXZ 428MXZ

110L 120L 122L 122L 124L 130L 136L 136L

Gold

5800 5800 5800 5800 5800 5800 5800 5800 5800 5800

250/125 250/125 250/125 250/125 250/125 250/125 250/125 250/125 250/125 250/125

520XSO 520XSO 520XSO 520XSO 520XSO 520XSO 520XSO 520XSO 520XSO 520XSO 520XSO 520XSO

90L 90L

8500 8500 8500 8500 8500 8500 8500 8500

750/NA 750/NA 750/NA 750/NA 750/NA 750/NA 750/NA 750/NA

GB428MXZ 120L

Gold

Gold

100L 110L 110L 114L 120L 120L

Gold

Gold Gold

GB428MXZ 130L

Gold

Gold

Gold

Clip Link Clip Link Rivet Link Rivet Link

Clip Link Clip Link

Gold

Gold

Gold

520EXW Premium XW Ring • Wear Life index: 800

41-043 41-040 41-044 41-041 41-045 41-042

520EXW 110L 520EXW 110L 520EXW 120L 520EXW 120L 520EXW Clip Link 520EXW Clip Link

8800 8800 8800 8800

750/400 750/400 750/400 750/400

Gold/Blk

Gold/Blk

XW ring cutaway

RX ring cutaway

Gold/Blk

Safety zone