Age and capacity by stage, why height beats age as a criterion, the trap of buying one size up, and how to progress safely.
Sommaire · 7 parties
01What age to start
| Age | Capacity | Models | Type |
|---|---|---|---|
| 4-6 | 50cc electric | Husqvarna EE 5, KTM SX-E 3 | Electric, parental control |
| 6-8 | 50cc combustion | KTM 50 SX, Husqvarna TC 50, Yamaha PW50 | First combustion machine |
| 8-11 | 65cc | KTM 65 SX, Husqvarna TC 65 | First proper two-wheeler |
| 11-14 | 85cc | KTM 85 SX, Yamaha YZ85, Husqvarna TC 85 | Pre-teen, before the 125 |
| 14-16 | 125cc 2T | KTM 125 SX, Yamaha YZ125 | First full-size motocross bike |
02The PW50, the classic starting point
The Yamaha PW50 has been the learner bike for forty years: automatic with no clutch, limited to about 45 km/h, 39 kg, near indestructible, and €500-1,200 used.
03Height, not age
Age tables give an order of magnitude; seat height gives the answer. The child must be able to put at least the balls of both feet down at a standstill with the bike upright. A child who cannot reach the ground cannot catch the bike, and falls far more often standing still than riding.
Second criterion, lever strength: on a 65, if the child cannot modulate the clutch with one finger, the machine is too big whatever their height.
04The trap of buying one size up
This is the most common mistake, and it is driven by price: buy a size up so the bike lasts three seasons. The result is a child who does not dare, rides tense, never learns weight transfer, and loses interest. A correctly sized bike sold on each year costs less than a wasted year.
The used market for children's bikes is active and depreciation is low: a 65 bought at €3,000 and sold at €2,600 a year later works out at €400 for the season.
05Progression and safety
The order that works is always the same: balance, then brakes, then throttle, then clutch. Electric learner machines allow power to be capped in steps, which makes that progression far clearer than a mechanically restricted combustion engine.
A lanyard kill switch is non-negotiable, including in a garden. It turns a crash with a stuck throttle into an ordinary fall.
06Schools and coaching
For a child starting out, a supervised school is the best option: qualified instructors, a suitable circuit, first aid on site, and often a bike and gear included for €40-80 a session.
07What it means for servicing
A child's machine covers little distance and a lot of time: stops, restarts, moderate revs. That is exactly the profile where mileage says nothing and hours count, with manufacturer intervals arriving sooner than people expect on a 50 or a 65.
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Boîtier sous la selle, app gratuite, sans abonnement. 129 € payés une fois.
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