Spare chain links for small-displacement bikes and ATVs, the pack known as AIEX 420 Chain Master Link, restores chain security quickly during roadside repairs. Peace of mind for weekend riders and pit crews who need dependable spares. Is keeping a set in the toolkit sensible for every rider?
⚡ At a Glance
- • Durability: High-strength steel alloy resists heat cracking and holds under stress
- • Best for: Owners of 50cc–125cc dirt bikes, quad buggies, mini bikes, pit ATVs and scooters
- • Not ideal for: Full-size motorcycles requiring larger chain standards than 420
Eight 420 master links per pack sized 23 x 10.2 x 16.1 mm for small-displacement machines. Forged steel alloy construction aids installation and reduces risk of heat-related cracking.
Faster roadside repairs - with unique forged design
Unique forged design gives each master link a shape that seats and locks more predictably, allowing clip or plate engagement with minimal hammering or specialised tools. The profile simplifies alignment on the chain pins for quicker assembly.
Quicker repairs when stranded or between sessions, restoring chain tension with fewer steps. Less time roadside means more time riding or racing.
Broad compatibility - with standard 420 sizing
Links measure 23 x 10.2 x 16.1 mm and match the 420 chain standard commonly used on 50cc–125cc machines. The design suits chains fitted to dirt bikes, quads, mini bikes, pit ATVs and scooters.
One spare set covers a range of small-displacement machines, so workshops and families can keep a single spare kit for multiple vehicles. Fleet maintenance and track-day teams gain simpler logistics.
Greater resilience under temperature stress - with high-quality steel alloy
Manufactured from a high-quality steel alloy intended to resist supercooling and undercooling effects that cause heat cracking over repeated thermal cycles. Alloy choice improves fatigue resistance compared with lower-grade steel.
Reduced risk of sudden link failure during intense use such as racing or prolonged riding. Durable construction means fewer replacements and more reliable chain connections over time.
✨ The 4 Key Reasons for AIEX 420 Chain Master Link
- Forged design — Easier installation and removal during roadside or track repairs
- Pack of 8 — Ensures multiple spare links for several maintenance tasks
- 420 size compatibility — Fits 50cc–125cc chains across bikes and quads reliably
- Compact dimensions — Small size stores easily in toolkits or pockets
📋 Technical Details at a Glance
- Category: Chain master link accessory
- Applicable Chains: 420
- Pack Quantity: 8 links
- Compatible Engine Sizes: 50cc, 70cc, 90cc, 110cc, 125cc
- Suitable Vehicles: Dirt bike, quad buggy, mini bike, pit ATV, scooter
❓ Frequently Asked Questions
Q: Are these links compatible with a 110cc dirt bike?
A: Yes. The links are intended for 50cc–125cc machines, so they are listed as compatible with 110cc dirt bikes.
Q: How many master links come in a pack?
A: Each package contains eight 420 chain master links.
Q: What material are the links made from?
A: Links use a high-quality steel alloy designed to be sturdy and to help prevent heat cracking caused by extreme temperature changes.
🏆 Our Verdict
Ideal for weekend riders, pit crews and anyone managing 50cc–125cc bikes or quads. Forged steel construction and straightforward sizing speed up repairs and reduce the likelihood of heat-related failure. Modest upfront cost and durable build make keeping spares sensible for long-term reliability.
