Rolon HPOR 356 High-Performance O-Ring Chain & Sprocket Kit for Royal Enfield Meteor 350, Classic 350 Reborn & Hunter 350 (15T/42T, 520, 104 Link)

Sort out noisy, stretched or jerky chain behaviour on your J-Series 350 with the Rolon HPOR 356 High-Performance O-Ring Chain & Sprocket Kit. Engineered specifically for Royal Enfield Meteor 350, Classic 350 Reborn (2021 onwards) and Hunter 350, this kit uses Rolon’s R520HPOR 104-link sealed O-ring chain with 15T front and 42T rear sprockets for smooth, efficient power transfer.

Compared to tired stock setups, HPOR 356 delivers cleaner acceleration, reduced chain slap and better longevity, especially for riders who tour, ride with luggage or do high daily mileage. The precision-machined sprockets are made from high-carbon steel, induction-hardened and zinc-coated for superior wear and rust resistance, inspired by specs highlighted by leading competitors but with more transparent fitment detail.

At Under The Hood, you’re not just buying a box – you’re buying from a workshop that lives Royal Enfield every day. We stock only 100% genuine Rolon kits, pack them safely for courier abuse, and back you up with real-world support. If you’re in or around Varanasi, you can even opt to have the kit installed at our studio along with proper chain cleaning and lubrication.

Upgrade once, ride worry-free for thousands of kilometres with a chain kit that’s proven on India’s roads and tuned for the J-Series 350 platform.

Key Features

• Dedicated J-Series fitment – Designed for Meteor 350, Classic 350 Reborn & Hunter 350 (not for old UCE Classic/Bullet/Thunderbird).

• Rolon R520HPOR sealed O-ring chain – 520 pitch, 104 links for long life and reduced stretch.

• 15T front / 42T rear sprocket combo – Matches factory gearing for balanced city and highway performance.

• High-carbon steel sprockets – Induction-hardened teeth with shot-blasted surfaces for excellent wear resistance.

• Anti-corrosion finish – Zinc coating and quality surface treatment help resist rust in rain, slush and washing.

• Reduced noise & vibration – O-ring sealing and accurate pitch reduce chain slap and harshness for smoother rides.

• New “safety link” design – Rolon safety link offers enhanced connecting strength and reliability.

• Direct bolt-on kit – No extra modifications required if your bike is a stock J-Series 350 with OEM sprocket sizes.

• Touring-ready – Ideal for riders who do long highway runs, ride with pillion and luggage, or use the bike daily.

• Backed by Under The Hood – Genuine stock, careful packing, WhatsApp support and chain-care guidance included.

Compatibility Table

Caution:

• ❌ Not suitable for Classic 350 UCE, Bullet 350/500, Thunderbird 350/500 or 650 Twins – hub pattern, tooth count and chain length are different.

• If your bike has non-stock sprocket sizes or aftermarket hubs, please confirm tooth count and hub pattern before ordering.

Variants

This specific listing is for:

• Rolon HPOR 356 – O-Ring Chain Kit (15T/42T, 520, 104L)

If the customer wants:

• More bling & extra corrosion resistance – Recommend upgrading to Rolon HPORC 389 Brass Chain Kit (brass-plated chain, same J-Series 350 fitment) – cross-link from this page.

What’s in the Box

• 1 x Rolon R520HPOR 104-link O-Ring drive chain (HPOR series)

• 1 x Front sprocket – 15 teeth (S 02 904)

• 1 x Rear sprocket – 42 teeth, 6-hole (58 mm PCD) (S 02 903)

• 1 x Rolon safety connecting link / master link

• Manufacturer packaging + basic fitment leaflet (where supplied by Rolon)

Installation & Maintenance Notes

• Always install with the arrow / marking aligned as per sprocket orientation and chain direction.

• Adjust chain slack as per Royal Enfield J-Series manual (typically ~25–30 mm at mid-span – confirm on your bike’s swingarm sticker or owner’s manual).

• After installation, ride gently for the first 50–100 km and re-check chain slack and sprocket nut torque.

• Clean with a dedicated chain cleaner or mild degreaser, never with petrol/diesel that can damage O-rings.

• Lubricate every 500–700 km or after heavy rain / washing using a good quality O-ring compatible chain lube (cross-link to your chain lube + cleaner combo listing).

• Replace the kit if you notice hooked sprocket teeth, tight spots, excessive chain stretch or uneven wear.

FAQs 

Q1. Will the Rolon HPOR 356 kit fit my old Classic 350 (UCE) or Bullet 350?
No. HPOR 356 is only for J-Series 350 models – Meteor 350, Classic 350 Reborn (2021+) and Hunter 350. For old UCE Classic/Bullet/Thunderbird, use the specific Rolon or OE kits meant for those bikes.

Q2. Is this better than the stock chain sprocket kit?
Yes. The HPOR series uses a sealed O-ring chain and hardened sprockets, offering better wear resistance, smoother power delivery and less frequent adjustment when maintained correctly, compared to many standard unsealed chains.

Q3. Do I need any modification or spacer to fit this kit?
On a stock Meteor 350 / Classic Reborn / Hunter 350 with OE wheel hub and sprocket sizes, it is a direct bolt-on replacement – no spacers or extra parts required. Just follow correct torque and alignment.

Q4. Will this affect my mileage or top speed?
The kit keeps the stock 15T/42T gearing, so mileage and cruising RPM remain similar to OEM, while smoother, more efficient power transfer can help maintain performance over time.

Q5. Is this a genuine Rolon kit or local duplicate?
This is a 100% genuine Rolon product, sourced from authorised distributors, with correct HPOR 356 markings and branded packaging. Under The Hood does not deal in counterfeit or loose imitation parts.