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1988 Honda CR125

Renthal Twin Ring Sprocket Kit

Retail: $178.97
$144.99
OEM Stock Sizes for a 1988 Honda CR125
Chain Type: 520 Chain Length: 114
Front Sprocket: 13 Rear Sprocket: 51
For reference only. Please verify with owners manual.
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FITS: 1988 Honda CR125 change
 
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Product Description

The MotoSport.com Renthal Twin Ring Sprocket Kit includes ONE Steel Countershaft (Front) Sprocket, ONE TwinRing® Rear Sprocket, and your choice of ONE Premium 520 Drive Chain, each with the following features:

Sprockets / Chainwheels Included:

Renthal Front Sprocket:

When looking to replace your sprockets, Renthal sprockets are an easy choice because of their strength and inexpensive price tag.

  • Also known as "chainwheels", Renthal front sprockets are precision manufactured to withstand the rigors of Supercross, motocross, and enduro racing.
  • Renthal Front Sprockets are made out of 655M13 nickel-chrome-molybdenum alloy steel. What does that mean to you? Ultimate strength and hardness.
  • Self-cleaning mud grooves prevent the build-up of dirt.
  • Precision machining to extremely tight tolerances ensures that Renthal front sprockets are always within spec.

Renthal TwinRing® Rear Sprocket:

The TwinRing® Rear Sprocket is the longest lasting, most durable off-road sprocket you can buy today. Its unique design and hybrid construction was developed over a five year period.

  • A long lasting and durable hybrid material off-road sprocket made from an aluminum inner core and a steel outer ring.
  • Has a unique flat face design which keeps weight to a minimum and means the TwinRing is as narrow as a regular chainwheel.
  • Inner Ring is high strength ultra-light 7075 T6 aluminum; Outer Ring is an electroless nickel-coated steel.
  • Outer is expanded at 200°C and then fitted to inner, creating a permanent bond for the life of the sprocket.
  • Available for most major off-road brands and models in Silver and Black. Renthal also offers Orange for KTM, Red for Honda and Blue for Yamaha.

Your Choice of Drive Chain:

D.I.D 520 Standard Chain - 120 Links:

The D.I.D Standard Non-O-Ring Chain is designed for low horsepower, smaller displacement mopeds, scooters and vintage motorcycles.

  • For machines originally equipped with non-O-ring chains.
  • Solid rollers.
  • Shot-peened parts.
  • High cylindrical and roundness accuracy.
  • Exacting tolerances provide low friction.
  • Pre-stretched.
  • Special alloy steel with extended riveted bushing "anti-kink" design.
  • Highest quality non-O-ring chain in overall combined performance.
  • Average tensile strength of 7,200 pounds.
  • Wear life index: 100.
  • Includes a clip-style master link.
  • 120 links.
  • Note: Non-sealed chains require more regular maintenance than sealed (O-ring, X-ring) versions and are mainly recommended for off-road use.

D.I.D 520 NZ Heavy Duty Chain - 120 Links:

Pinning your bike out of every turn might tear apart the stock chain, but D.I.D and their 520NZ chain will not let you, or your race for first, down.

  • For machines originally equipped with non-O-ring chains.
  • Solid rollers.
  • Shot-peened parts.
  • High cylindrical and roundness accuracy.
  • Exacting tolerances provide low friction.
  • DHA pin treatment - hard chromium-carbide layer formed on pin surface for exceptional strength and wear resistance.
  • Pre-stretched.
  • Special alloy steel with extended riveted bushing "anti-kink" design.
  • Highest quality non-O-ring chain in overall combined performance.
  • Up to 19% higher tensile strength; average tensile strength of 8,220 pounds.
  • Wear life index: 410.
  • Rated for up to a 250cc bike.
  • Weight (per 100 links): 3.54 pounds.
  • Includes a clip-style master link.
  • 120 links.
  • Note: Non-sealed chains require more regular maintenance than sealed (O-ring, X-ring) versions and are mainly recommended for off-road use.

D.I.D 520 DZ2 Chain - 120 Links:

The All New D.I.D 520DZ2 is the best value in a lightweight, high-performance chain designed for motocross racing.

  • Great value in a lightweight chain.
  • Designed for off-road riding and motocross.
  • The DZ2 has twice the lifespan of the previous DZ.
  • SDH pin treatment - hard chromium-carbide layer formed on pin surface for exceptional strength and wear resistance.
  • Flexible inner soft core absorbs shock.
  • For entry level motocross, trial riding at an affordable price.
  • Average tensile strength of 7,870 pounds.
  • Wear life index: 410.
  • Rated for up to a 450cc motocross bike.
  • Weight (per 100 links): 3.08 pounds.
  • Includes a clip-style master link.
  • Gold finish, 120 links.
  • Notes: DZ and DZ2 Connecting Links are not interchangeable. Non-sealed chains require more regular maintenance than sealed (O-ring, X-ring) versions and are mainly recommended for off-road use.

D.I.D 520 ERT2 Gold Chain - 120 Links:

The D.I.D ERT2 chain is the most trusted chain in Supercross and motocross racing because of its reputation of meeting the high quality demands that are required when pushing the limits. It was designed with the intention of making a chain that is optimized for the purpose of racing. D.I.D beefed up the ERT2 chain by increasing the pin size by 3% to give the chain an average tensile strength of 8,100 pounds. Increasing the strength of the ERT2 chain did not come with a sacrifice of weight, in fact DID was able to shed 5% from the previous ERT chain.

  • Exclusively designed for motorcycle racing.
  • High-performance, lightweight and low friction chain.
  • 3% bigger pin diameter and 5% lighter than former ERT.
  • Provides the highest wear resistance, tensile strength and impact resistance.
  • Average tensile strength of 8,100 pounds.
  • Wear life index: 430.
  • Rated for up to a 450cc motocross bike.
  • Weight (per 100 links): 2.99 pounds.
  • Includes a clip-style master link.
  • 120 links.
  • Notes: ERT and ERT2 Connecting Links are not interchangeable. Non-sealed chains require more regular maintenance than sealed (O-ring, X-ring) versions and are mainly recommended for off-road use.

D.I.D 520 ERV3 X-Ring Chain - 120 Links:

The D.I.D ERV3 X-ring chain is the ultimate high-performance, lightweight, low-friction race chain available and is used extensively by many off-road race teams. The ERV3 X-ring chain utilizes D.I.D's patented X-ring technology which reduces friction by 50% over standard O-ring chains for minimized power loss. The pins on the ERV3 X-ring chain have been put through a patented heat-treatment process to produce a pin that is 1.5 times harder than conventional pins. The result is a chain that is significantly stronger and offers better wear resistance than many other chains on the market. D.I.D ERV3 X-ring chains feature a gold-plated finish that resists rust and adds a little style to your motorcycle or ATV.

  • Exclusively designed for motorcycle racing.
  • High performance, lightweight and low friction chain provides the winning edge in World Class competition.
  • Features gold color plates.
  • Average tensile strength of 8,650 pounds.
  • Wear life index: 3100.
  • For 250 - 750cc Rally, 750cc Superbike and 250 - 750cc Endurance applications.
  • Weight (per 100 links): 3.30 pounds.
  • Includes a rivet-style master link.
  • 120 links.

D.I.D 520 VX2 X-Ring Black Chain - 120 Links:

D.I.D's Pro-Street X-Ring® VX Series Chains are high quality X-Ring® chains with superior strength to withstand the horsepower of today's dual sports and trials bikes. The VX Series uses D.I.D's patented low friction X-Ring® for maximum performance.

  • Greater rigidity (7% higher than previous VM chain) creates smother handling, reduced power loss and quicker response.
  • Highest value in all D.I.D series.
  • D.I.D X-Ring has half the friction and 50 - 100% longer wear life compared to typical O-ring chains.
  • Superior longer life than previous VM series.
  • Solid rollers.
  • Shot-peened parts.
  • Pre-stretched.
  • Extended riveted bushing "Anti-Kink" design.
  • Replaces the Professional O-ring V Series and the Premium X-ring VM series chains.
  • Average tensile strength of 8,210 pounds.
  • Wear life index: 3500.
  • Ideal for bikes and ATV's up to 750cc.
  • Weight (per 100 links): 3.35 pounds.
  • Includes clip-style master link.
  • 120 links.

D.I.D 520 VX2 X-Ring Gold and Black Chain - 120 Links:

  • Greater rigidity (7% higher than previous VM chain) creates smother handling, reduced power loss and quicker response.
  • Highest value in all D.I.D series.
  • D.I.D X-Ring has half the friction and 50 - 100% longer wear life compared to typical O-ring chains.
  • Superior longer life than previous VM series.
  • Solid rollers.
  • Shot-peened parts.
  • Pre-stretched.
  • Extended riveted bushing "Anti-Kink" design.
  • Replaces the Professional O-ring V Series and the Premium X-ring VM series chains.
  • Average tensile strength of 8,210 pounds.
  • Wear life index: 3500.
  • Ideal for bikes and ATV's up to 750cc.
  • Weight (per 100 links): 3.35 pounds.
  • Includes clip-style master link.
  • 120 links.

Renthal 520 R1 Gold Race Chain - 120 Links:

Renthal's R1 Works Chain is a high-strength non O-ring chain with excellent impact load resistance designed specifically to withstand the stress found in off-road applications. This chain is the choice where a combination of high strength, light weight and maximum power transfer are important considerations.

  • Shot-peened alloy steel side plates for high tensile strength and maximum impact load resistance.
  • Chamfered inner links to reduce the chance of chain derailment.
  • Extended bushings to reduce friction between outer and inner link plates, maximizing power output.
  • Chromized bearing pins for excellent resistance to wear.
  • Gold color side plates help prevent corrosion.
  • Most perfectly matched chain for Renthal sprockets allowing maximum power at the rear wheel. This also extends the life of both the chain and sprockets.
  • Average tensile strength of 7,644 pounds.
  • Wear life index: 300.
  • Maximum displacement (street / off-road): N/A / 500cc.
  • Weight (per 100 links): 2.13 pounds.
  • Each chain includes master link and a pair of latex gloves for mess free installation.
  • 120 links.
  • Note: Non-sealed chains require more regular maintenance than sealed (O-ring, X-ring) versions and are mainly recommended for off-road use.

Renthal 520 R3 O-Ring Chain - 120 Links:

Renthal's R3-2 O-ring Chain is a high-strength sealed-ring chain with excellent impact load resistance designed specifically to withstand the stress found in off-road applications where an O-ring chain is desired. This chain is the choice where a combination of high strength, light weight and maximum power transfer are important considerations. The O-rings help extend chain life by retaining the special vacuum-injected grease near the critical pin area. Chain comes pre-stretched to shorten break-in period.

  • Nitrile O-rings extend chain life by retaining special vacuum-injected grease inside the chain joint.
  • Shot-peened alloy steel side plates for high tensile strength and maximum impact load resistance.
  • High-carbon alloy steel bearing pins for excellent resistance to wear.
  • Gold colored side plates help prevent corrosion.
  • Pre-stretched to enhance performance of the chain.
  • Available in 520 pitch only.
  • Average tensile strength of 7,644 pounds.
  • Wear life index: 750.
  • Maximum displacement (street / off-road): N/A / 500cc.
  • Weight (per 100 links): 3.36 pounds.
  • Each chain includes a pair of latex gloves for mess free installation.
  • 120 links.
  • Note: The Renthal R3-2 chain is supplied with both an easy-fit split master link and a superior solid-pin rivet master link which matches the durability of the chain.

Note for installing X-ring chains: As X-ring chains are wider than standard roller chains, when fitting an X-ring chain to a motorcycle that was fitted with a non O-ring chain as original equipment, it is essential to check that there is proper clearance of the engine cases near the countershaft sprocket and any other places of close contact. Failure to do so could result in damage to the chain and motorcycle and could ultimately cause the chain to fail.

Note: Image is for reference ONLY, actual product will vary based on fitment and selection.

  • Customer Reviews
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1-10 of 28
Overall
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Verified Purchaser
Location: Central Parkway, FL, USA
Great sprockets

Front and real sprocket have been great, but the Renthal chain broke in half after 2hrs on it! I will purchase the sprockets again but will not be buying renthal chains! Will stick to DID!

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Verified Purchaser
Location: San Diego County, CA
Highest Quality, Longest Lasting

I have run Renthal chain & sprocket set ups on dozens of different off-road and road bikes over a 25 year racing, riding, testing and tuning career. At times I spend upwards of 100 days per year riding off road, and I ride a street bike in place of a car most days. I have built a number of race winning and championship wining machines over the years as well. Firstly, When you replace your chain and sprockets you should always do so as set. This ensures the best longevity and performance from your drivetrain. This is because the chain and sprockets wear together, and by replacing one component, but not the others, this accelerates wear for all the components, both new and old. In the case of these Renthal items, their high tensile strength chains and specialy machined hard anodized sprockets last longer (with proper lubrication and adjustment) than any other set up I have ever used over my very long riding-racing career. I reccomend Renthal full aluminum sprockets and non O-Ring R1 Works Chains for MX and sprint Racing. This is because in MX and sprint Racing these are the lightest, strongest components available, and therefore rob dthe least power from your drivetrain and provide the least possible unsprung wieght . This paticular set, with Renthal Works O- ring chain and Twin Ring Steel Teeth-Hard Anodized Aluminum inner is for a high use off road Endurance Set-up on a YZ450. For offroad and road race Endurance racing, long duration training rides, and all Streetbike applications, the Twin Ring is the way to go because it offers unmatched lightness combined with incredible durabilty and toughness. This YZ450 routinely sees 50 miles of sand, rocks and desert riding per fuel tank, and 100 miles per day is not uncommon. The twin ring set up will last for at least 100 hard run race-practice days and many, many hours. This is the set up I reccomend for recreational riders because the long life saves you a ton of money, and if properly adjusted and lubed will last most riders several seasons and will out last other aluminum chain sprocket combos by several times, all while wieghing a fraction of what other steel set ups wiegh, meaning you are not losing power by using aheavy steel sprocket drive line set up. It is important to note this set will be lubed after the chain and sprockets are warmed with Maxima Clear chain lube which is another important step and good tip. You should get into the habit of lubing your chain at the end of every ride when the chain and sprockets are nice and hot. This allows the lube to penatrate best, and then "set up" as driveline cools.This helps prevents most of your lube from flying off and ending up on your rear wheel, which is what happens when you lube cold right before you ride. Have fun and keep the rubber side down.

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Verified Purchaser
Location: Southeast Florida , USA
Renthal Twin Ring Sprocket LASTS!!!

Rear sprocket has outlasted the chain and countershaft sprocket Rear sprocket Survived the wettest enduro I ever raced., x ring chain is toast now. Florida sand and wet conditions, harescrammbles and enduros

Overall
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Junk

The screws that hold the outer part of the sprocket to the inner part of sprocket come loose and fall out. Got about three rides out of this sprocket and noticed that there was only four screws holding it together Would not recommend

Overall
Durability
Ease of Installation
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Top 1000 Contributor Verified Purchaser
Location: São Paulo, Brazil
The awsome sprocket kit

Nice on the Bike! The visual is perfect! Undisputed quality! The price is correct for the quality, explains why most pros use!

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Top 1000 Contributor
Location: Michigan, USA
Looked pricey, but is well worth the money!!!

This combo is high quality! Get the Tag replacement bolt kit to go with this set. They have a larger allen key holes and look great. They should be included in this combo. I opted to upgrade to the Renthal 520 R3 O-Ring chain. This set is on my 07 CRF450R with stage 2 cam and High compression piston. I have put about 40 miles of hard trail ridding on it so far with lots of clutch and throtle action. I have not had to adjust my chain tention yet and no sign of wear on th sprockets at all. Remarkable in my book.

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Verified Purchaser
High Quality

Got to have the twin ring on a four stroke.

Renthal Twin Ring Sprocket Kit
Overall
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Location: Madison, AL, USA
2005 CRF250R - This is the setup to use!

Renthal chain is a little heavier than the DID non o-ring (Honda manual), but it does not streatch like the DID. I also found the Renthal chain matches these sprockets better than any other. I race hare scrambles and get all kinds of debris mixed between the spockets and chain, but this setup has worked out to be the best I've tried. Somewhat self clearing and is durable. Clean it after your ride, hit it with a water dispersant (WD-40), when the bike is finished drip drying, lube the chain with your favorite non sling. For me it is definitely worth the money.

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Ease of Installation
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Verified Purchaser
Location: Maple Valley, WA, USA
Perfect all around sprocket

The best, most durable sprocket made. Well worth the price!

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Durability
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Verified Purchaser
Location: Slidell LA
Great purchase

Very nice chain and sprocket set. Easy to install. So far seems to be holding up very well.

1-10 of 28
Total Questions (5)
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KawasakiRider487 Location: Dewey, Prescott Valley, AZ 86327, USA
1-5 of 5
KawasakiRider487 Over 8 months ago Location: Dewey, Prescott Valley, AZ 86327, USA
What sprokets should i run on my 09 kx250f?
What if I run a 14 and 50 tooth sprocket set instead of the 13 and 48 tooth set up?
MotoSport Staff
Over 8 months ago Location: Portland, OR, USA
Gearing is completely a personal preference. First i would ask whether you want more acceleration and to tighten the gears up, or do you want to spread the gears out and have them pull farther. By running a 14/50 you would slightly shorten the gearing up. This means you will gain a some acceleration but will need to shift sooner. The most common gear ratio for average tracks is a 13/49 combination on the 2009 KX250f.
OldTimer Over 10 months ago Location: Western New York, USA
Sprocket hardware?
Are you able to use the stock hardware (bolts) to fasten the new sprocket to the hub?
MotoSport Staff
Over 10 months ago Location: Portland, OR, USA
Yes you can use the stock hardware to attach the sprocket to your hub. It is recommended to replace the hardware when changing sprockets though due to high stress they endure. There are after market sprocket bolt kits that are reasonably priced for a new set of hardware.
Ellyxgncc Over 10 months ago
My 06 yz478f what chain is the best isnt there a step up from the x-ring icant seem to find it.?
The bike is completely built. Money isnt an issue.
MotoSport Staff
Over 10 months ago Location: Portland, OR, USA
The X-ring chains really are the top of the line style chain. There are also Z-ring chains but is debatable as to which is better. O-ring chains with a single wide point of contact will tend to last a little longer but have much higher friction than the X-ring or Z-ring chains. One of the best X-ring chains out there is the DID ERV3. Incredibly high quality chain that you cant go wrong with.
jnice62108 Over 3 years ago
Front sprocket?
does this kit come with one because it should.
MotoSport Staff
Over 3 years ago Location: Tualatin
yes the Renthal Twinring sprocket kit will come with a countershaft sprocket.
1 year 1 month ago Location: Madison, AL, USA
Yes, once you have specified your bike, you then have to specify the front and rear sprocket teeth quantity just before you add to cart.
woodsracer250 Over 5 years ago
Can you buy a new steel outer sproket ring when it wears out?
Expert MotoSport Staff
Over 5 years ago
unfortunately you must replace the whole sprocket once it wears out.
1 year 1 month ago Location: Madison, AL, USA
I think you are asking about the actual steel teeth on the rear sprocket. If so, I don't think it is sold separately. You can purchase the rear sprocket assembly separately without having to buy it in a kit that would include the chain and front sprocket. Hope this helps.
1-5 of 5

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