Buying a used motocross bike: the 10 things to check (complete guide)

01The used motocross market in France

The average price of a used motocross bike in France sits between €2,500 and €6,000 depending on age, capacity and condition. The main risk: a bike whose maintenance has been neglected, with an engine close to needing a rebuild.

02The 10 things to check

1. Engine hours (the big one)

The odometer on a motocross bike is useless (plenty of motocross bikes don't even have one). What counts is engine hours.

How do you find out?

• Ask the seller whether an hour meter is fitted
• Look at the service log (if there is one)
• If the seller runs a HOROTAG RUUVI, scan the QR code on the service log — the hours are sealed and can't be tampered with
• No hour meter and no log: you simply don't know. Negotiate accordingly.

"The odometer isn't always a reliable way to check this kind of information. Ask to see the bike's service log instead." — icasque.com

2. The engine from cold

Non-negotiable: start it from cold. A seller who has "already warmed it up" is hiding something.

• Kick or electric start: how many attempts?
• White smoke on a cold start = normal (condensation)
• Persistent blue smoke = oil getting past the rings → top-end needed
• Ticking from the top = valve clearance → adjustment, or worse

3. The coolant

Open the radiator cap (engine COLD). The coolant should be green or pink and translucent. If it's brown, rusty or oily → head gasket.

4. The engine oil

Unscrew the dipstick. The oil should be clean (amber). Black is normal if the last oil change was a while and a few hours back. Metal flakes = serious internal wear.

5. The frame

Look for cracks, especially:

• At the engine mounts
• On the lower cradle
• Around the steering head

A cracked frame = scrap (repair is possible but rarely trustworthy).

6. The steering head bearings

Bike on a stand, front wheel off the ground. Turn the bars lock to lock. It should be smooth, with no stiff spots or notches. A notch = bearings to replace (~€100-150).

7. The suspension

• Forks: no oil weeping down the stanchions
• Shock: no leaks, correct rebound (push down on the seat)
• A leaking fork = €200-400 rebuild

8. The transmission

• Chain: no tight spots, correct tension (3-4 cm of slack)
• Sprockets: teeth not hooked (shark-fin shape = worn)
• Full chain and sprocket kit: €100-200

9. The brakes

• Pads: 2 mm of material minimum
• Discs: no warping (spin the wheel and watch)
• Fluid: clear, not brown

10. The plastics and the general look

Plastics don't lie. A bike with cracked plastics, bent levers and a scuffed handlebar has been used hard. That doesn't make it a bad bike — but the price has to reflect the use.

03The magic question to ask

"Do you have a service log or an hour meter?"

If yes → the seller is serious. If no → negotiate as if the top-end were due.

04Quick checklist (print it out)

• [ ] Engine hours known
• [ ] Cold start OK
• [ ] No blue smoke
• [ ] Coolant clean
• [ ] Oil clean, no flakes
• [ ] Frame free of cracks
• [ ] Steering with no notches
• [ ] Forks not leaking
• [ ] Chain and sprockets OK
• [ ] Brakes OK