The MotoSport.com Sunstar 525 Steel Sprocket And Chain Kit includes ONE Steel Countershaft (Front) Sprocket, ONE Steel Rear Sprocket, and your choice of ONE Premium Drive Chain, each with the following features:
Sprockets / Chainwheels Included:
Sunstar is the largest O.E.M. supplier of sprockets and brake rotors in the world. In fact, your motorcycle probably came from the factory with a Sunstar sprocket. Need a reason to choose Sunstar? Every Sunstar product is imbued with superior quality, uses an exclusive heat-treatment and quenching process, is based on advanced research and design, and is sold at an added value price.
Sunstar Front Sprocket:
- Manufactured from case-hardened chromoly steel for the ultimate in strength and durability.
- "Parkerizing" surface treatment for rust and corrosion resistance.
Sunstar Steel Rear Sprocket:
- Manufactured using only the highest quality 1045 high-carbon steel.
- Exclusive heat treatment for added strength and wear resistance.
- Most are zinc plated and have a baked-on durable paint process for corrosion resistance.
- The strongest, longest lasting steel replacement sprocket available.
Your Choice of Drive Chain:
| Chain |
Chain Type |
Avg. Tensile Strength |
Maximum Rated Displacement |
Weight (pounds per 100 links) |
Master Link Type |
| BikeMaster 525 BMOR O-Ring Chain |
O-ring |
9,300 pounds |
900cc |
N/A |
Rivet |
| BikeMaster 525 BMXR X-Ring Chain |
Q4 seal-ring |
9,000 pounds |
990cc |
N/A |
Rivet |
| BikeMaster 525 BMXR X-Ring Chain - Colored |
Q4 seal-ring |
9,300 pounds |
1100cc |
N/A |
Rivet |
| BikeMaster 525 BMZR Z-Ring Chain |
Z-ring |
10,420 pounds |
1200cc |
N/A |
Rivet |
| D.I.D 525 VX3 X-Ring Chain |
X-ring |
9,980 pounds |
1000cc |
4.09 |
Rivet |
| D.I.D 525 VR46 X-Ring Chain |
X-ring |
9,980 pounds |
1000cc |
4.09 |
Rivet |
| D.I.D 525 ZVMX X-Ring Chain |
X-ring |
10,408 pounds |
1300cc |
4.65 |
Rivet |
| EK Chains 525 SRX2 QX-Ring Chain |
Quadra-X ring |
9,000 pounds |
1000cc |
N/A |
Screw |
| EK Chains 525 MVXZ2 Quadra-X Ring Chain |
Quadra-X ring |
9,300 pounds |
1000cc |
N/A |
Rivet or clip |
| EK Chains 525 ZVX3 NX-Ring Chain |
ZX-ring |
10,300 pounds |
1300cc |
4.52 |
Rivet |
| Renthal 525 R4 SRS Chain |
SRS-ring |
9,217 pounds |
1300cc |
N/A |
Rivet |
| RK 525 XSO RX-Ring Chain |
RX-ring |
8,850 pounds |
900cc |
4.30 |
Rivet |
| RK 525 GXW XW-Ring Chain |
XW-ring |
9,300 pounds |
1100cc |
4.30 |
Rivet |
| Sunstar 525 RDG DualGuard Sealed Chain |
DG-ring |
8,850 pounds |
900cc |
4.30 |
Rivet |
| Sunstar 525 RTG1 Works TripleGuard Sealed Racing Chain |
TG-ring |
9,300 pounds |
1100cc |
4.30 |
Rivet |
| Sunstar 525 RRR1 Premium Road Racing Chain |
(Sealed ring) |
9,300 pounds |
1000cc |
4.3 |
Rivet |
| Vortex 525 SV3 Black Street / Roadrace Sealed Chain |
Duo Glide (X-ring) |
8,850 pounds |
900cc |
N/A |
Rivet |
| Vortex 525 RV3 Black Street / Roadrace Sealed Chain |
Tri Glide (X-ring) |
9,300 pounds |
1100cc |
N/A |
Rivet |
Notes on Manufacturer Chain Type:
- Q4 seal-ring - BikeMaster's X-ring design, Q4 seal-ring chains offer 1.5 to 2 times longer wear resistance than regular O-ring chains. Q4 seal-ring technology provides superior wear resistance, higher impact resistance and fatigue strength while also giving less friction, which leads to less power loss, almost half that of standard O-ring chain.
- Quadra-X ring - EK Chains proprietary X-ring style.
- ZX-ring - Adopted new ZX-ring and lasts 15% longer than ZVX series.
- SRS-ring - Renthal proprietary X-ring design. The special SRS ring is pre-loaded during assembly creating a spring effect. As the chain wears, conventional O-rings and X-rings lose their seal integrity, whereas the SRS ring is designed to maintain itself during use, keeping a tighter seal against the side plates. This offers increased longevity as the specially formulated grease remains incased around the critical pin and bushing area longer while also keeping dirt, water and other contaminants out.
- RX-ring - RK proprietary X-ring design. RK RX-ring seals are made from an advanced Nitrile Butadiene composite for maximum performance and wear life. Viewed in cross-section, the RK "RX-Ring" has two lubrication pools and seal points versus the single seal point / pool design of a regular O-ring chain.
- XW-ring - RK proprietary X-ring design. Uses an advanced design with XW-Ring construction for better sealing that provides extended wear and chain life up to 100% over conventional chains. XW-Ring chains are the best high-speed, extreme heat performance chains available today.
- DG-ring - Sunstar proprietary X-ring design. DualGuard sealed ring street bike chain technology where the sealing ring has an 'X' shape - meaning there are two sealing points and two lubrication pools versus the one-sided, single-lip design of a standard O-ring. This sealed ring design type dramatically improves lubricity in high heat conditions while providing lower friction and longer chain life.
- TG-ring - Sunstar proprietary X-ring design. TripleGuard sealed ring technology where there are 3 sealing lips and lubrication pools on each side of the ring to maintain top performance in high heat, extreme conditions; the TripleGuard ring type is the best for lubrication and protection.
- Duo Glide (X-ring) - Vortex proprietary X-ring design. Duo Glide seal design reduces heat and friction resulting in a 7 times longer wear life than a standard O-ring chain.
- Tri Glide (X-ring) - Vortex proprietary X-ring design. Tri Glide seal provides 3 pockets of lubrication and two stabilizers ultimately reducing heat, friction, and increasing wear life by as much as 10 times over standard O-ring chains.
Note: Image is for reference ONLY, actual product will vary based on fitment and selection.
Some Helpful Tools: Try the Motion Pro Chain Breaker & Riveting Tool or BikeMaster's Heavy-Duty Chain Breaker & Rivet Tool to make removing your old chain and installing your new chain as easy and painless as possible.
BikeMaster 525 BMOR O-Ring Chain:
O-ring chain offers high durability. Component designs, optimized with computer analysis, provide higher tensile strength. Specially controlled heat treatment means tougher material. Reinforced roller offers higher impact resistance and longer durability.
- Average tensile strength of 9,300 pounds.
- Maximum engine size of 900cc street / 750cc off-road.
- Includes rivet master link.
- Made in Japan.
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BikeMaster 525 BMXR X-Ring Chain:
BikeMaster is a brand that focuses on quality, performance, and value priced products for motorcycles and ATV's.
- Ideal O.E.M. replacement Q4 Sealed Chain (Q4 seal-ring chain) offers 1.5 to 2 times longer wear resistance than regular O-ring chains.
- Each refined component, designed with computer analysis, provides higher tensile strength.
- Specially controlled heat treatment means tougher material and more durability.
- Q4 seal ring and reinforced pin and roller provide superior wear resistance, higher impact resistance and fatigue strength.
- Q4 seal ring offers less friction, which leads to less power loss, almost half that of standard O-ring chain.
- Round rivet head offers superior rigidity over 2 or 4-point (quad-staked) riveting.
- Average tensile strength of 9,000 pounds.
- Maximum rated displacement (street / off-road): 990 / 800cc.
- Includes rivet master link.
- Note: This chain must be correctly matched to the machine size and power output. Failure to do so could result in failure of the chain, causing damage to the machine or other property, serious injury to the rider or others, or even death of the rider or others. It is the responsibility of the installer to ensure that the chain selected is correctly matched to the machine and installed correctly. If you have any doubts, contact a professional before use.
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BikeMaster 525 BMXR X-Ring Chain - Colored:
BikeMaster is pleased to announce the addition of colored chains to their BMXR Series Sealed Chain product line. The chains will now be available in red, blue, green, yellow, orange and pink, making it easy for customers to customize their bikes to fit their style.
Made in Japan, each chain is an O.E.M. replacement Q4 Sealed Chain that offers 1.5 to 2x longer wear-resistance than standard O-ring chains. They have been designed with computer analysis to provide refined components and higher tensile strength. Each chain has also undergone a specially controlled heat treatment. This results in a chain that is tougher and more durable. The Q4 seal ring with reinforced pin and roller ensure higher impact resistance and fatigue strength as well as less friction.
- Ideal O.E.M. replacement Q4 Sealed Chain (Q4 seal-ring chain) offers 1.5 to 2 times longer wear resistance than regular O-ring chains.
- Each refined component, designed with computer analysis, provides higher tensile strength.
- Specially controlled heat treatment means tougher material and more durability.
- Q4 seal ring and reinforced pin and roller provide superior wear resistance, higher impact resistance and fatigue strength.
- Q4 seal ring offers less friction, which leads to less power loss, almost half that of standard O-ring chain.
- Average tensile strength of 9,300 pounds.
- Max engine size of 1,100cc street / 900cc off-road.
- Includes rivet master link.
- Note: This chain must be correctly matched to the machine size and power output. Failure to do so could result in failure of the chain, causing damage to the machine or other property, serious injury to the rider or others, or even death of the rider or others. It is the responsibility of the installer to ensure that the chain selected is correctly matched to the machine and installed correctly. If you have any doubts, contact a professional before use.
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BikeMaster 525 BMZR Z-Ring Chain:
Specifically developed for today's 1,000cc to 1,400cc, high-performance sport machines. High-quality components coupled with a factory-greased seal ring ensures superior rigidity. High-tensile steel used throughout the chain components; larger pins mean loads spread out over wider area, resulting in longer life and more strength. Specially controlled heat treatment means tougher material and more durability.
- Average tensile strength of 10,420 pounds.
- Max engine size of 1,300cc.
- Includes rivet master link.
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D.I.D 525 VX3 X-Ring Chain:
The VX Series chain is a great chain upgrade from O.E.M. and is D.I.D's most popular and widely used chain on both on and off-road bikes.
- The 525VX3 boasts a 41% longer chain life than the VO Series due to the patented X-Ring seal technology.
- It also has increased rigidity as to reduce flex, which gives you a more responsive and smooth driving experience.
- Max cc: 1,000cc.
- Tensile strength: 9,980 pounds.
- Weight (per 100L): 4.09 pounds.
- Seal: X-Ring.
- Chain life index: 4000.
- Pin length: 0.866".
- Pin diameter: 0.217".
- Inner plate thickness: 2.2.
- Outer plate thickness: 2.2.
- Rivet connecting link.
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D.I.D 525 VR46 X-Ring Chain:
MotoGP rider Valentino Rossi has teamed up with D.I.D to create the signature series VR46 racing chain, with which his Petronas Yamaha Racing Team YZR-M1 will be equipped this season. The chain features VR46's "Sole e Luna (Sun and Moon)" symbol mark, and it runs a silver outer plate, and gold inner plate, with a VR46 yellow master-link. For racing and Rossi enthusiasts, this will be a golden opportunity to use a product backed by The Doctor himself.
- X-Ring seal design gives you low-friction, increased sealing performance for extended chain life.
- Designed in collaboration with renowned motorcycle road racer, Mr. Valentino Rossi.
- Unique look of gold inner plates and silver outer plates.
- Valentino Yellow rivet-style master link.
- Average tensile strength of 9,980 pounds.
- Wear life index: 4,000 (standard chain = 100).
- Rated up to a maximum displacement of 1000cc.
- Weight (kgs/100 links) = 1.86 (4.09 pounds).
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D.I.D 525 ZVMX X-Ring Chain:
D.I.D's engineers are continuously improving chain designs in order to handle the tremendous horsepower loads of today's high performance motorcycles. In developing the new DID ZVM-X series, D.I.D focused on "Rigidity." Traditionally, "Tensile Strength" has been the bench-mark to indicate overall strength, but tensile strength is only a laboratory static measurement of a chain's fracture point. Rigidity, on the other hand, is the ability of a chain to withstand the forces that occur in the real world that riders experience. Increased rigidity means better power transfer from the engine to the ground, greater resistance to stretching under load, and overall improved performance that meets the demands of the current high-power bikes and the people who ride them.
- Increased rigidity for better power transfer and greater resistance to stretching under load.
- Overall improved performance that meet the demands of the current high-power bikes.
- Designed to meet requirements of machines bigger than 1000cc.
- Same excellent characteristics of the ZVM chains, but its new X2-ring design provides 40 percent greater wear resistance and better overall chain life.
- Average tensile strength of 10,408 pounds.
- Wear life index: 4000.
- For use on Superbikes; maximum rated displacement 1300cc.
- Weight (per 100 links): 4.65 pounds.
- Includes a rivet-style master link.
Half the Power Loss - Compared with Normal O-ring chains, D.I.D's patented X-Ring construction reduces friction by twisting between the side plates instead of being squashed. Normal O-rings and other makers' modified O-rings have squashed points that increase friction. The twisting action of the X-Ring disperses the pressure and minimizes power loss.
1.5 to 2 Times Longer Wear Resistance - Compared with Normal O-ring chains, the X-Ring's four contact points greatly increase its sealing performance. This keeps the dirt out and the lubrication in much better than any other O-ring. X-Rings have the greatest wear resistance of any other type of O-ring or non-O-ring chain.
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EK Chains 525 SRX2 QX-Ring Chain:
The Ultimate Sportbike Chain: The SRX2 Series chains are an excellent value for any street machine. The SRX2 chains feature lightening holes, reduced friction and Quadra X-Ring design which increases chain life from up to two times longer than standard O-Ring chain.
- Can be used for street or dirt.
- Max displacement: Street - 1000cc / Dirt - 750cc.
- Tensile strength: 9000 pounds.
- Quadra X-Ring design - QX-Ring is 40% less friction and 150% more durable.
- Lightening holes reduce weight without compromising strength.
- Comes with screw-style master link; rivet and clip types sold separately.
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EK Chains 525 MVXZ2 Quadra-X Ring Chain:
EK's Supreme Quadra-X Ring Chains, The Ideal O.E. Replacement.
EK's MVXZ2 Quadra-X Ring chain is the ideal replacement chain for any 1000cc street bike. Features like lightening holes in the sideplates, large-diameter pins, and friction-reducing Quadra-X Rings help ensure high-performance and up to two times increased wear life compared to a standard O-ring chain.
- For street use only.
- Maximum displacement: Street - 1000cc.
- Tensile strength: 9300 pounds.
- Standard with rivet-type or clip-type (semi-press) masterlink.
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EK Chains 525 ZVX3 NX-Ring Chain:
The Pinnacle of Chain Technology.
- Ultra Strong: ZVX3 series chains easily surpass every other brand with a tensile strength of 11,100 pounds.
- New ZX-ring: Adopted new ZX-ring and lasts 15% longer than ZVX series.
- Minimizing the clearance between the plates: Improved stiffness and weight (4.85/100 pounds).
- Tensile Strength: 10,300 pounds.
- Weight: 4.52 pounds per 100 links.
- Maximum Displacement: 1,300cc.
- MLJ Rivet-type Connecting Link: The MLJ is the most dependable connecting link, more commonly used on street machines. Requires special riveting tool to install.
- Note: May also use the SLJ Screw-type Connecting Link, sold separately.
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Renthal 525 R4 SRS Chain:
Renthal's R4 SRS Road chain is a specially developed sealed ring chain utilizing Renthal's Self Regulating Seal (SRS) technology to increase the service life of the chain in road applications. The special SRS ring is pre-loaded during assembly creating a spring effect. As the chain wears, conventional O-rings and X-rings lose their seal integrity, whereas the SRS ring is designed to maintain itself during use, keeping a tighter seal against the side plates. This offers increased longevity as the specially formulated grease remains incased around the critical pin and bushing area longer while also keeping dirt, water and other contaminants out.
The Renthal "Road R4" chain is supplied with a solid pin rivet link, matching the durability of the chain.
- SRS ring technology enhances chain flexibility and offers smoother operation than standard O-ring chains.
- All R4 SRS Road chains feature high-alloy steel plates and pins, solid bushings and rollers, shot-peened side plates for added strength and gold side plates.
- Special quad riveting process and thicker outer plates increases overall strength.
- Chains come pre-stretched from the factory so less adjustment is needed during initial break-in.
- Average tensile strength / Maximum displacement: 9217 pounds / 1300cc.
- Every chain comes with a pair of latex gloves for mess free installation.
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RK 525 XSO RX-Ring Chain:
As part of their continuing quality improvement program, the RK Chain Factory has made a running production upgrade to their best selling 525XSO chain. The 525XSO chain features RK's proprietary "RX-Ring" seal design and is offered in 520, 525 and 530. Viewed in cross-section, the RK "RX-Ring" has two lubrication pools and seal points versus the single seal point / pool design of a regular O-ring chain. RK's new GBXSO chains offer quality, performance and unbeatable value, for all but the most demanding high performance applications.
- High-performing, durable chain that will last five to eight times longer than your standard motorcycle chain.
- Constructed from polished, shot-peened alloy steel providing high tensile strength for maximum performance.
- RK RX-ring seals are made from an advanced Nitrile Butadiene composite for maximum performance and wear life.
- Side plate treatment helps prevent corrosion.
- Designed to make any motorcycle look stylish.
- Average tensile strength of 8,850 pounds.
- Wear life index: 750.
- Maximum displacement (street / dirt): 900cc / 750cc.
- Weight (per 100 links): 4.30 pounds.
- Includes a rivet-style master link.
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RK 525 GXW XW-Ring Chain:
525GXW is RK's premium quality 525 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 GXW. With a maximum tensile strength rated at 9300 foot pounds and suitable up to 1100cc street bikes and 800cc off-road bikes, GXW can handle anything you dish out!
- New lightweight high-performance sportbike chain.
- Uses an advanced design with XW-Ring construction for better sealing that provides extended wear and chain life up to 100% over conventional chains.
- Constructed from polished, shot-peened alloy steel providing high tensile strength for maximum performance.
- Side plate treatment helps prevent corrosion.
- Designed to make any motorcycle look stylish.
- Average tensile strength of 9,300 pounds.
- Wear life index: 1000.
- Maximum displacement (street / dirt): 1100cc / 800cc.
- Weight (per 100 links): 4.30 pounds.
- Includes a rivet-style master link.
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Sunstar 525 RDG DualGuard Sealed Chain:
Sunstar's heavy duty, street motorcycle chain model is the RDG series (RDG = Road Dual Guard) for 520, 525 and 530 applications. It uses Sunstar's DualGuard sealed ring street bike chain technology where the sealing ring has an 'X' shape - meaning there are two sealing points and two lubrication pools versus the one-sided, single-lip design of a standard O-ring. This sealed ring design type dramatically improves lubricity in high heat conditions while providing lower friction and longer chain life - and it is available for just about every street motorcycle on today's market. It comes in the natural color option and uses a strong rivet-type connecting link. For a higher performance road chain at a non-premium price, the Sunstar RDG answers the bell and is great for everything from everyday commuting to closed course riding.
- Features Sunstar's DG-ring (DualGuard) design for better performance and durability.
- Great choice for any type of street use; perfect choice for high-performance riding but at a non-premium price.
- Only available in a Natural finish.
- Average tensile strength of 8,850 pounds.
- Maximum rated displacement (street / off-road): 900cc / 750cc.
- Weight (per 100 links): 4.30 pounds.
- Includes rivet-style master link.
- Note: NOT suggested for competition.
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Sunstar 525 RTG1 Works TripleGuard Sealed Racing Chain:
For a top of the line, premium-level roadracing chain, Sunstar offers the RTG1 series - Sunstar's highest performing roadracing chain - for 520, 525 and 530 street applications (RTG1 = Road Triple Guard). This Works level chain features the TripleGuard sealed ring technology where there are 3 sealing lips and lubrication pools on each side of the ring to maintain top performance in high heat, extreme conditions; the TripleGuard ring type is the best for lubrication and protection. The 520, 525 and 530 are available in pre-cut lengths and come in the gold color option (gold outer and inner plates). The 520 is great for any bike 1000cc or less which already uses a 520 pitch, the 525 is suitable for any street motorcycle up to 1100cc using a 525 chain pitch, and the 530RTG1 is suitable for the high-performance, larger displacement machines like the Suzuki Hayabusa, Kawasaki ZX-14R Ninja and others in the same class that use 530 pitch. All options use the rivet-type connecting link and are well suited to handle the demands of the toughest racing conditions encountered on the street.
- Utilizes exclusive TG-ring (TripleGuard) for the ultimate in heat prevention and lubricity even in extremely harsh conditions.
- Assembled of the best 100% heat treated components.
- Extremely strong, yet also in a lightweight design - weighing just over 4 pounds per 100 links.
- Gold finish.
- Average tensile strength of 9,300 pounds.
- Maximum rated displacement (street / off-road): 1100cc / 800cc.
- Weight (per 100 links): 4.30 pounds.
- Includes rivet-style master link.
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Sunstar 525 RRR1 Premium Road Racing Chain:
SS525RRR1-120 Street Sealed gold chain. Sunstar's highest performance On Road chain is the RRR1 series - featuring a high performance sealed ring and gold inner and outer plates.
- The sealed ring design provides ultimate protection against extremely high heat build up.
- As with all of Sunstar's on road chains, it comes with a rivet type connecting link so you will need a chain tool for installation.
- Weighing only 4.3 pounds per 100 links and suited for high performance, street sport machines 1,000cc and under with a tensile strength rating of 9,300 pounds.
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Vortex 525 SV3 Black Street / Roadrace Sealed Chain:
For more than 15 years, U.S.-based Vortex Racing continues to manufacture, market and sell top-quality motorcycle racing components for Motocross, Supercross, Road Racing, Flat Track Racing and Minibikes. Owned and operated by motorcycle racers and enthusiasts, they focus on absolute quality. Each of their race components is made to the tightest tolerances with the best quality materials in the industry. Vortex tests on the track with direct feedback from top professional race teams worldwide. Vortex parts have been put to the test by some of the world's most respected champions and teams.
- Duo Glide seal design reduces heat and friction resulting in a 7 times longer wear life than a standard O-ring chain.
- Average tensile strength of 8,850 pounds.
- Maximum rated displacement (street / off-road): 900cc / NA.
- Includes rivet-style master link.
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Vortex 525 RV3 Black Street / Roadrace Sealed Chain:
- Tri Glide seal provides 3 pockets of lubrication and two stabilizers ultimately reducing heat, friction, and increasing wear life by as much as 10 times over standard O-ring chains.
- Average tensile strength of 9,300 pounds.
- Maximum rated displacement (street / off-road): 1100cc / NA.
- Includes rivet-style master link.
- Note: Image is for display purposes ONLY; actual item may vary.
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