BELTS, CHAINS & SPROCKETS
FEATURES
All RK chains are prestressed 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.
HOW TO ORDER
SPECIFICATIONS CHART
RK chain is available cut-to-length or
MAXIMUM
MAXIMUM
WEAR LIFE AVERAGE TENSILE
ENGINE CC
WEAR LIFE AVERAGE TENSILE
ENGINE CC
in bulk. Precut lengths are individually
SIZE AND TYPE
INDEX
STRENGTH (LB.)
STREET/ DIRT
SIZE AND TYPE
INDEX
STRENGTH (LB.)
STREET/ DIRT
boxed with a clip-type connecting
520 Std.
100
7,200
250/NA
GB 520 MXZ4
300
9,000
NA/ 500
link and all bulk rolls include clip-type
530 Std.
100
7,200
400/NA
GB 520 MXU
600
9,000
NA/ 500
connecting links. When ordering
GB 420 MXZ
200
5,000
150/ 100
520 EXW,
precut lengths, the number of links
GB 428 MXZ
200
5,800
250/ 125
GB 520 EXW
1,000
8,500
400/ 750
is indicated at the end of the PART #
(example: PART #RKM52082 for a 520
NOTE: Wear Life Index should be used as a comparison for probable wear life under identical circumstances.
Standard chain with 82 links).
Think of it as a percent, with standard chains being 100.
SEALED RACING XW-RING (520 EXW)
Designed to withstand the torturous rigors of off-road ATV racing
Inspired by the famous Paris-to-Dakar and Baja 1000 championship XW-ring chains
High-speed, extreme-heat performance with tons of tensile strength
Suitable for up to 750cc applications
Chains include clip connecting link
520 EXW – CUT-TO-LENGTH
GB 520 EXW (GOLD COLOR) – CUT-TO-LENGTH
SUG.
SUG.
PART #
SUG. RETAIL
PART #
SUG. RETAIL
PART #
SUG. RETAIL
PART #
RETAIL
PART #
RETAIL
GB520EXW-100
$109.42
GB520EXW-110
$120.33
GB520EXW-120
$131.30
RK520EXW-100
$99.17
RK520EXW-120
$119.00
RK520EXW-110
109.10
GB 520 EXW CUT-TO-LENGTH
DESCRIPTION
PART #
SUG. RETAIL
DESCRIPTION
PART #
SUG. RETAIL
DESCRIPTION
PART #
SUG. RETAIL
Clip connecting link
R18-520EXW
$8.90
Clip connecting link
R18-GB520EXW
$8.90
Rivet connecting link
R18-GB521EXW
$8.90
SEALED RACING UW-RING (MXU)
The lightest sealed-ring racing chain on the market
Designed to deliver consistent power delivery with an extended chain life
Weighs only 3 lb. per 100 links but delivers huge tensile strength
Ideal for race applications between 125-500cc
Chains include clip connecting link
GB 520 MXU (GOLD COLOR) – CUT-TO-LENGTH
LINKS
PART #
SUG. RETAIL
LINKS
PART #
SUG. RETAIL
110
1222-0190
$125.83
116
1222-0193
$132.70
DESCRIPTION
PART #
SUG. RETAIL
114
1222-0192
130.42
120
1222-0194
137.28
Clip connecting link
1225-0144
$8.90
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, both 420 and 428 MXZ chains are the strongest in their class, giving you the best
value-performance rating of any MX chain in the world today
With a maximum tensile strength of 9,000 lb. and weight of 2.89 lb., the newly designed GB 520 MXZ4 is
the lightest and strongest MX chain on the market
For 100cc/ 125cc applications
Chains include clip connecting link
GB 420 MXZ (GOLD COLOR) – CUT-TO-LENGTH OR BULK
GB 428 MXZ (GOLD COLOR) – CUT-TO-LENGTH OR BULK
SUG.
SUG.
SUG.
SUG.
SUG.
SUG.
LINKS PART #
RETAIL LINKS PART #
RETAIL LINKS PART #
RETAIL
PART #
RETAIL
PART #
RETAIL
PART #
RETAIL
82
RK420MXZ82
$27.52 114
RK420MXZ114 $38.25 124
RK420MXZ124 $41.63
RK428MXZ100
$40.03
RK428MXZ118
$47.23
RK428MXZ130
$52.05
100
RK420MXZ100
33.57 116
RK420MXZ116
38.93 126
RK420MXZ126
42.28
RK428MXZ110
44.03
RK428MXZ120
48.03
RK428MXZ132
52.85
104
RK420MXZ104
34.90 118
RK420MXZ118
39.60 130
RK420MXZ130
43.63
RK428MXZ114
45.63
RK428MXZ124
49.63
110
RK420MXZ110
36.92 120
RK420MXZ120
40.28 132
RK420MXZ132
44.28
RK428MXZ116
46.43
RK428MXZ126
50.43
DESCRIPTION
PART #
SUG. RETAIL
DESCRIPTION
PART #
SUG. RETAIL
DESCRIPTION
PART #
SUG. RETAIL
25’
R18429MXZ
$240.17
Gold clip connecting link
R18430MXZ
$2.95
Gold clip connecting link
R18422MXZ
$2.43
GB 520 MXZ4 (GOLD COLOR) – CUT-TO-LENGTH
LINKS
PART #
SUG. RETAIL
LINKS
PART #
SUG. RETAIL
DESCRIPTION
PART #
SUG. RETAIL
116
1221-0023
$99.80
120
1221-0024
$103.23
Clip connecting link
1225-0099
$3.92
STANDARD
Heat-treated medium carbon alloy steel construction
All components heat-treated and shot peened for maximum strength
Two-point pin riveting and solid rollers
For ATVs and motorcycles up to 500cc that did not come with an O-ring or heavy-duty chain as
standard equipment
Chains include clip connecting link
M520 – CUT-TO-LENGTH OR BULK
M530 – CUT-TO-LENGTH
PART #
SUG. RETAIL
PART #
SUG. RETAIL
PART #
SUG. RETAIL
PART #
SUG. RETAIL
RKM530118
$26.50
RKM52082
$18.40
RKM52090
$20.20
RKM52098
$22.02
RKM52084
18.85
RKM52092
20.67
RKM520130
29.20
DESCRIPTION
PART #
SUG. RETAIL
RKM52086
19.32
25’
R18-M521
$136.07
2017 PARTS UNLIMITED ATV/UTV