Sitemap Contact Us  

 

Receive our
RSS feeds
  Subscribe to our newsletter
 
 
SUBSCRIBE TO MAILING LIST
Name:  
 
Email Address:  
Blemished and Closeout
SEARCH PRODUCTS
MX PRODUCTS
ATV PRODUCTS
STREET PRODUCTS
HARLEY PRODUCTS
CLOSEOUT PRODUCTS

SPONSORSHIP LINKS


 

Please install Flash® and turn on Javascript

LATESTPRODUCTS

All RK Heavy Duty & Sealed-ring Motocross chains utilize special heat treated hi-carbon steel components with solid rollers and bushings, then pre-stressed and pre-stretched for maximum performance and wearlife.

Hear testimonials from Factory and Privateer
Teams on RK Chains and Excel Rims.

LOGO USE: To request the use of the RK logo, please download the Logo Use Permission Form and submit to us for consideration. Click Here

RK Excel University - How to Change your Chain with Team KTM Off-Road from RK Chains on Vimeo.

RECOMMENDED 520 CHAINS
DISCIPLINE 1st 2nd 3rd
SUPERCROSS RACING MXU MXZ4  
MOTOCROSS RACING MXU MXZ4 EXW*/**
ENDURO RACING MXU EXW*/**  
OFF-ROAD EXW*/** MXU  
DUAL SPORT EXW*/**  
ATV EXW  

* Cannot be used on CRF250F/X due to case clearance.
** May slightly rub the case on various Honda models

SUITABLE FOR MOTOCROSS/SUPERCROSS/OFF-ROAD
SUITABLE FOR ATV USE

 

 



click for specifications

GB420MXZ and GB428MZX (& NON GOLD 420, 428MXZ) Heavy duty Rated up to 125cc Applications: These lightweight Gold mini-works racing chains were developed from the same advanced alloy material and manufacturing technology as GB520MXZ. Both 420 and 428MXZ Racing Chains are the strongest in their class giving you the best Value-Performance rating of any MX Racing Chain in the world today! Available in Gold or Metal finishes.

SPECIFICATIONS - CLICK HERE

420SO and 428SO
RK offers the best O-ring chains in the industry. All RK O-ring chains are constructed of hi-carbon alloy steel for strength and durability. RK utilizes Nitrile Butadiene O-rings to seal in lubrication and deliver smooth power with no O-ring drag or loss of horsepower.

SPECIFICATIONS - CLICK HERE

click for specifications

GB520MXU SEALED MOTOCROSS
MXU is the lightest sealed-ring motocross chain available on the market today. Made for the professional motocross racer, GB520MXU is the next generation of motocross racing chains featuring RK's new UW-sealing rings. MXU chains are designed to provide the most consistent power delivery and increased chain life. All components are heat treated using Rk's exclusive HIT (Heat Induction Transfer) process. MXU has a maximum tensile strength rated at 9,000 foot pounds, weighs a mere 3.0 lbs for 100 links and can handle any MX race application from 125 to 500ccs.


UW-Seal Cut-away

UW Elongation Chart

GB520MXZ4 ( & NON GOLD 520MXZ)
Heavy duty Rated up to 500cc Applications: Made for the serious Motocross racer, GB520MXZ is available in our distinctive gold or metal racing finish. MXZ 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 9000 foot pounds and weighing in at only 2.89 lbs., GB520MXZ4 is the lightest and strongest Motocross chain available today! Ideal for professional level 125cc to 500cc Open Class racing. Now available in Neon Red, Neon Blue, Neon Green and Orange!

GB520EXW and Non-Gold 520EXW XW-Ring
Rated up to 750cc Applications: Dirt and ATV GB520EXW is RK's premium quality 520 XW-Ring chain. XW-Ring chains are the best high-speed, extreme heat performance chains available today. So, If you've modified your ride into an extreme high-speed machine, you need the strength and performance of GB520EXW. With a maximum tensile strength rated at 8500 foot pounds and suitable up to 750cc ATV/Quads and Off-Road bikes, GB520EXW can handle anything you dish out!

Click here to view the instruction
sheet ( PDF file )

NEW! RK CHAIN BREAKER / PRESS-FIT & RIVET TOOL #UCT2100

Quickly and easily breaks 40 & 50 type chain. Easily press-fits tight tolerance 40,50 & 60 O-ring chain sideplates to the correct depth for clip or rivet link installation. Flares RK's special pin hole rivet links to the proper dimension to secure sideplates in place. Works on most brands. Lifetime warranty on tool body & Handle. Replacement parts available.

UCT2100 Breaker/Press Fit Rivet Tool $139.95

For RK Chain Warranty Card Information Click Here

MX OFF-ROAD CHAIN SPECS

PIN LENGTH MM
MAXIMUM
CLIP or RIVET
WEIGHT LBS / 100 LINKS
MAX cc STREET / OFF-ROAD
RETAIL PRICE*
WEAR LIFE INDEX
TENSILE LBS / FT
GOLD
NON-GOLD
COLORS
STANDARD
M420 RK-Malaysia
14.80
100
4,200
CLIP
1.60
80 / 80
 
 
$      13.73
 
M428 RK-Malaysia
16.85
100
4,500
CLIP
1.85
125 / 80
 
 
$      16.64
 
HEAVY DUTY 
420MXZ & GB
15.70
300
5,000
CLIP
1.76
150 / 125
 
$     38.32
 
$      27.40
 
428MXZ & GB
17.60
300
5,800
CLIP
2.13
250 / 125
 
$     43.55
 
$      33.07
 
520KZ6
18.15
200
7,900
CLIP
3.15
600 / 250
 
$     62.50
 
$      54.44
 
520MXZ4 & GB
17.70
300
9,000
CLIP
2.99
NA / 500
 
$   104.83
 
$      87.07
 
$120.17
STANDARD O-Ring
420SO
17.05
400
4,420
CLIP
1.72
125 / 125
 
 
$      78.44
 
428SO
20.05
400
5,500
CLIP
2.26
250 / 200
 
 
$      86.42
 
520SO
19.90
600
7,700
CLIP
4.08
400 / 400
 
 
$      72.02
 
PERFORMANCE RX-Ring
520XSO & GB
19.90
750
8,500
RIVET
3.36
750 / 750
 
$   124.15
 
$    108.03
 
PREMIUM XW-Ring
GB520MXU   SX/MX
18.00
600
9,000
CLIP
3.10
NA / 500
 
$   124.15
 
 
520EXW & GB
20.80
1,000
8,500
CLIP
3.36
400 / 750
 
$   124.15
 
$    108.03
 
520GXW, GB & Colors
20.80
1,000
8,800
RIVET
3.75
1000 / 750
 
$   151.24
 
$    130.99
 
$   161.80
GB = Gold Inner/Outer Plates
40 Series Chain - 24.0 Links per foot 
NA = Not Applicable
50 Series Chain - 19.2 Links per foot 
 
 

* Prices subject to change without notice

RK Excel America | Phone: 760-732-3161 | Fax: 760-732-3186 | E-mail: info@rkexcelamerica.com