Aprilia SX 125 - 2008 Specifications and Reviews
The 2008 Aprilia SX 125 is a lightweight motocross bike designed for young riders and beginners entering competitive off-road racing. Its 124cc single-cylinder engine delivers accessible power while the liquid-cooled design ensures reliable performance during training and amateur competition. Known for its nimble handling and affordability, the SX 125 remains a popular entry-level choice for aspiring motocross racers.
General information | |
| Category | Cross / motocross |
| Year | 2008 |
| Model | Aprilia SX 125 |
| | |
Engine and Transmission Specifications | |
| Transmission typefinal drive | Chain |
| Cooling system | Liquid |
| Lubrication system | Miscelazione separated with volumetric pump and variable capacity |
| Starter | Kick |
| Ignition | Electronics to capacitive discharge CDI |
| Fuel system | Carburettor. Dell carburetor and #146; Garden VHST 28 |
| Compression | 12.5:1 |
| Torque | 12.20 |
| Stroke | 2 |
| Engine type | Single cylinder |
| Capacity: | 124.80 ccm (7.62 cubic inches) |
Physical measures and capacities | |
| Overall width | 850 mm (33.5 inches) |
| Overall length | 2,165 mm (85.2 inches) |
| Overall height | 1,390 mm (54.7 inches) |
| Seat height | 870 mm (34.3 inches) If adjustable, lowest setting. |
| Dry weight | 115.0 kg (253.5 pounds) |
| | |
Aprilia SX 125 dimensions and frame | |
| Rear brakes diameter | 220 mm (8.7 inches) |
| Rear brakes | Single disc. floating clamp to single pistoncino |
| Front brakes diameter | 260 mm (10.2 inches) |
| Front brakes | Single disc. floating clamp to double quantity pistoncino parallel |
| Rear tyre dimensions | 150/60-17 |
| Front tyre dimensions | 110/70-17 |
| Rear suspension travel | 270 mm (10.6 inches) |
| Rear suspension | Oscillating Forcellone in steel, hydraulic monoshock-absorber with piggy-back, excursion rotates 270mm |
| Front suspension travel | 260 mm (10.2 inches) |
| Front suspension | Teleidraulica staple to steles turned upside down from 40mm, excursion rotates 260mm |
| Frame type | Chassis in steel to high resistenziale with double beam to attice and double crib with reggisella decomposable |
Speed and acceleration | |
| Reserve fuel capacity | 1.30 litres (0.34 gallons) |
| Fuel capacity | 10.00 litres (2.64 gallons) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
Performance Profile & Rider Fit
14.8 hp
Peak Power
Best For
Track30%
City85%
Cornering80%
Daily Riding65%
Touring20%
Passenger25%
Rider Profile
| Best For | This bike suits new and younger riders, including those on a learner or A1-equivalent licence, who want a light, approachable machine to build confidence on. |
| Purpose | It's built as a nimble supermoto-styled commuter for weaving through city traffic and having fun on twisty back roads rather than for outright speed. |
| Rider Fit | Its low weight and tall but slim seat make it easy to manage at a stop for shorter or less experienced riders, though the 880mm seat height requires reasonable inseam length. |
| Character | Playful, flickable, and eager to be thrown around corners, it rewards an energetic riding style over long-distance cruising. |
| Not Ideal For | It's not the right choice for riders wanting highway speed, long motorway touring comfort, or serious off-road capability. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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