Motorcycle Spare Parts Chain and Sprocket Kits 420 Chain
Get the Strong and Cheap 428HG Motorcycle Chain!
Does your motorcycle need a new chain? Is your old chain worn out? This 428HG chain is very strong. It is also affordable. This means it won’t cost you too much money. This chain will help your motorcycle run! It is a key component in the power transmission of your motorcycle.
Product Information
| Specification | pull （kgf） | Workload (kgf) | Displacement |
| 420 | 1700 | 357 | 90CC |
Get Your Ride Going Strong with Our 420 Chain and Sprocket Kit!
s your motorcycle, mini bike, ATV, or go-kart feeling slow? Does it need new parts? Our Motorcycle Spare Parts Chain and Sprocket Kits 420 Chain are here to help you! This kit is a full motorcycle chain replacement . It has the special 420 chain size that many bikes need. Think of it as a tune-up for where the power goes to the wheels! This is a top 420 chain sprocket kit for your ride. Using a Roller Chain like this one, size 420, is important.
What Makes Our Kit Great?
Fits Lots of Rides: This kit is like a universal sprocket kit . It works for many dirt bikes, mini bikes, ATVs, and even 4 wheel-karts . We check mini bike sprocket compatibility carefully. It’s perfect for go-kart chain upgrades . Does your ride use a 196cc engine ? This kit fits models like CT200U, BT200X, CT200U-EX, Baja Heat, Massimo MB165, and MB200. We have universal dirt bike parts and universal mini bike kits . Thinking about quad bike drivetrain upgrades ? This might be it! You can look at our drivetrain compatibility charts or use compatibility verification tools . Our cross-compatibility charts help too. It even fits the KTM 50 SX 2025 and works with KTM 890 Duke (Orange) parts . It’s also good for older bikes like the Harley-Davidson Softail FXST FXR FXD from 1990-93 .
Super Strong Parts: We use really good metal. Many kits have high carbon steel sprockets . Some have a strong, light aluminum rear sprocket from brands like Vortex Racing ]. The 420 chain durability is tested. Brands like JT Steel Sprockets use heat-treated sprocket manufacturing. This heat treatment process makes them hard! Some have a cool black zinc finish coating made with induction hardening. This means wear-resistant sprockets that last. They are hand-finished sprockets for top quality. Vortex Racing components offer aluminum sprocket kits and are proud U.S.-manufactured components . We do sprocket lifespan testing. The zinc-plated corrosion protection and weatherproof chain coatings fight rust. We check sprocket hardness ratings and use good sprocket surface treatments. The chain roller durability is checked with impact resistance testing . This helps with chain stretch prevention. You get more life than mild steel or surface hardened sprockets. These are heavy-duty chain applications, like a Heavy Duty Motorcycle Chain.
Go Faster, Save Gas: Want more zoom? This kit can help boost speed and save fuel . Get ready for speed performance upgrades The special improved gear curve design means less rubbing (friction reduction design). This gives you gear curve optimization and helps with torque optimization . Feel powerful performance on all terrains, like dirt or roads. It’s great for motorcycle acceleration tuning and sending power (motorcycle torque transmission). Better power transmission efficiency makes your ride feel strong. We even work on vibration reduction designs and noise reduction technology for a smoother ride. It’s a key part of the Power Transmission Chain system on your bike.
Easy to Put On: Fixing your bike should be fun! Our kits are made for easy installation. We have easy installation guides . You can quickly upgrade your bike. Everything you need is in the box – all components included for installation. Just check the sprocket bolt patterns and use the right sprocket mounting hardware. Make sure the chain is straight using chain alignment guides and set the right tightness with chain slack adjustment.
What's Inside the Box?
Most kits come with:
- One Steel Countershaft (Front) Sprocket (often stock size Primary Drive steel front sprocke)
- One Steel Rear Sprocket (often stock size Primary Drive steel rear sprocket)
- One Premium Drive Chain (like a stock size Primary Drive 420 MC chain [^1b]) These are the main sprockets / chainwheels you need. It’s a complete replacement kit! You might get a 420 steel sprocket and chain kit or a Vortex 420 aluminum sprocket and chain kit. It’s a full replacement chain kit.
More Details About the Parts
| Feature | Detail | Why It’s Good |
|---|---|---|
| Chain Pitch | 420 (This is the size) | Fits many common bikes, ATVs, karts |
| Sprocket Teeth | Varies! Examples: 40T rear , 37T/17T combo , 32T front (Harley) | Gives different speed or power focus |
| Material | High-grade hardened steel, High carbon steel, Aluminum | Strong, lasts long, some are light weight |
| Chain Tech | Some use X-Ring seal technology(like the VX chain series) | Keeps dirt out, lube in, lasts longer, less friction |
| Standards | Meets O.E.M. specs(like the factory parts) | Fits right, works right |
| Connecting Link | Often 1/2X1/4 size included | Lets you connect the chain ends |
| Part Numbers | Examples: KTM 46110166000 , Harley 40250-92 | Helps make sure you get the exact right part |
| Sprocket Shape | Specific sprocket tooth profiles and sprocket bore sizes | Matches your bike’s setup |
| Chain Pins/Rivets | Strong chain pin specifications and chain rivet types | Holds the chain together safely |
Why Pick Our Kit?
You get the power and torque you need for your sport bike or cruiser. These are finely machined chains and sprockets . We choose parts with internationally recognised quality. Trust brands like JT Steel Sprockets, Vortex Racing, and Sunstar (the biggest O.E.M. supplier). These are great OEM replacement kits. See how they stack up in OEM vs aftermarket comparisons. Find them easily in Amazon listings or eBay sprocket listings. Look for eBay Guaranteed Fit on 420 Chain Motorcycle & Scooter Drivetrain Sprockets. Perfect for motorcycle aftermarket parts.
Who Uses This Kit?
- Riders doing dirt bike chain maintenance
- People needing all-terrain vehicle parts
- Racers using Motocross motorcycle racing components
- Go-kart fans wanting performance kart racing parts
- Anyone fixing up their ride’s off-road drivetrain system
Keep Your New Parts Happy!
- Remember chain lubrication requirements. Keep it oiled!
- Use chain cleaning kits sometimes.
- Follow drivetrain maintenance schedules.
- Check chain tension adjusters are set right.
- Look for chain wear indicators.
- You might need chain riveting tools or a chain breaker tool.
- Use sprocket alignment tools for best life.
- Think about chain guard compatibility.
- Learn about motorcycle sprocket history and motorcycle chain history.
- Know your motorcycle sprocket standards and chain tensile strength.
- Understand your motorcycle gear ratios .
Ready to make your ride better? Get your 420 Chain and Sprocket Kit today!
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Frequently Asked Question
420 chain is a specific size standard for motorcycle drive chains. The “4” indicates the pitch (distance between the link pins) is 4/8ths of an inch (which simplifies to 1/2 inch or 12.7mm). The “20” refers to standard dimensions related to the chain’s roller width and inner plate height. These chains are typically non-sealed (no O-rings or X-rings) and are designed for lighter-duty applications.
420 chain and sprocket kits are most commonly found on smaller displacement motorcycles (often in the 50cc to 125cc range, sometimes up to 150cc), such as mini bikes, pit bikes, entry-level dirt bikes, youth motocross bikes, some small street bikes, and certain smaller All-Terrain Vehicles (ATVs). They are suited for lower horsepower and torque applications.
standard 420 chain and sprocket kit typically includes:
1. One front sprocket (also called the countershaft sprocket).
2. One rear sprocket.
3. One 420 drive chain of the appropriate length (or slightly longer, requiring cutting).
4.One master link (usually a clip-type for 420 chains) to connect the chain ends.
Chains and sprockets wear together as a system. Putting a new chain on worn sprockets will cause the new chain to wear out very quickly and unevenly. Similarly, new sprockets with an old, stretched chain will also experience accelerated wear. Replacing all three components (chain, front sprocket, rear sprocket) simultaneously ensures optimal performance, smooth power delivery, and the longest possible lifespan for the entire drive system.
The best ways to confirm are:
1. Check your motorcycle’s owner’s manual or service manual.
2.Look for markings stamped onto your existing chain links (often “420” is visible).
3.Look up the Original Equipment Manufacturer (OEM) specifications for your specific motorcycle model and year online or through a parts fiche.
4.Measure the pitch (pin-to-pin distance) of your current chain; it should be 1/2 inch (12.7mm) for a 420 chain.
Look for these signs:
1.**Sprocket Teeth:** Pointed, hooked, or broken teeth on either sprocket.
2.**Chain Slack:** The chain requires very frequent adjustment or has excessive slack that can’t be properly adjusted within limits.
3.**Chain Condition:** Kinked, rusted, or stiff links that don’t bend smoothly.
4.**Noise:** Grinding, clicking, or popping sounds from the drive system during operation.
5.**Chain Stretch Test:** Try pulling the chain away from the rearmost point of the rear sprocket. If you can pull it back more than half a tooth height, it’s likely worn out.
Lifespan varies significantly based on factors like chain quality, maintenance frequency (cleaning and lubrication), riding conditions (mud, sand, water vs. clean pavement), and riding style. A well-maintained quality 420 kit on a small bike used appropriately might last anywhere from 5,000 to 15,000+ miles (or an equivalent number of hours for off-road use). Neglect can drastically shorten this lifespan.
Key maintenance includes:
1. **Cleaning:** Regularly remove dirt, grime, and old lubricant using a chain cleaner and brush.
2.**Lubrication:** Apply a quality motorcycle chain lubricant specifically designed for non-sealed chains (or as appropriate if you have a rare sealed 420 chain) evenly across the rollers and side plates.
3.**Tension Adjustment:** Regularly check and adjust the chain slack (tension) according to the specifications in your motorcycle’s owner’s manual. Proper tension is crucial for performance and safety.
Yes, often you can order kits with different teeth counts than stock, as long as the sprockets physically fit your motorcycle’s hubs/splines.
Yes. While most 420 chains are standard non-sealed types.
