Motorcycle chain: lubrication, tension, and replacement

The chain: the hardest-working part on your bike

The drive chain absorbs massive forces with every acceleration and downshift. Poorly maintained, it wears prematurely, damages the sprockets, and eventually breaks — sometimes while riding.

Regular maintenance is simple, quick, and extends the life of the entire kit.

Lubrication: every 500 km

The basic rule: lubricate your chain every 500 km, or after every ride in the rain. Water washes away lubricant and accelerates corrosion.

What to use:

• A motorcycle-specific chain spray (Motul, Ipone, Bel-Ray...)
• Apply to the inner face of the links, with the rear wheel spinning (side stand, push the bike)
• Let it soak in for 10-15 minutes before riding

What NOT to use:

• Not WD-40 — it's a penetrant, not a lubricant. It strips the O-rings from the chain and accelerates wear
• No thick bearing grease — it attracts dust and forms an abrasive paste

Before lubing, clean the chain with a specific chain cleaner and a soft brush. Never use a pressure washer — the pressure destroys the O-rings.

Tension: 25-35 mm of slack

Tension is measured on the side stand, at the midpoint between the gearbox output sprocket and the rear sprocket. Push the chain up, then down. The difference (slack) should be 25-35 mm on most models.

To adjust:

1. Loosen the rear wheel axle
2. Use the chain adjusters (adjustment bolts on the swingarm plates)
3. Check alignment using the engraved marks — both sides must be identical
4. Re-torque the rear axle (100-150 Nm depending on model)
5. Re-check tension after tightening

Warning: a chain that's too tight prematurely wears the gearbox output bearings and sprocket. A chain that's too loose can jump off or hit the swingarm.

When to replace: the 2% rule

A chain is worn when it has stretched more than 2% of its original length. In practice:

• Pull the chain backward at the rear sprocket. If you can expose more than half a tooth, it's done.
• Check the links: if they're stiff or seized, the chain is finished.
• Look at the sprocket: hooked teeth (worn points on one side) = sprocket needs replacing too.

Always replace as a full kit

Never replace the chain alone. A new chain on a worn sprocket wears twice as fast. Always change the full kit: chain + rear sprocket + front sprocket.

It's an investment of 80-200 EUR depending on the model, versus 500 EUR or more if a broken chain damages the crankcase.

Lifespan

With proper maintenance (regular lubrication, tension checked), a chain kit lasts between 20,000 and 40,000 km depending on the chain type (O-ring, X-ring) and riding style.

Try L'Atelier free for 10 days — no credit card required.