14 August. Friday 2026
CH Racing CH 509 Pro Senior - 2009 Specifications and Reviews
The CH Racing CH 509 Pro Senior is a lightweight 50cc minibike designed for young riders and beginners seeking entry-level off-road experience. Its compact 35kg frame, low 678mm seat height, and air-cooled single-cylinder engine deliver manageable power ideal for learning fundamental riding skills. Best suited for youth racing and recreational trail riding.
2009
Engine and Transmission Specifications | |
| Transmission typefinal drive | Chain |
| Cooling system | Air |
| Starter | Kick |
| Fuel system | Carburettor. DELL´ORTO PHBG 19 BS |
| Power | 12.00 |
| Stroke | 2 |
| Engine type | Single cylinder |
| Capacity: | 49.70 ccm (3.03 cubic inches) |
| | |
Physical measures and capacities | |
| Wheelbase | 1,024 mm (40.3 inches) |
| Ground clearance | 250 mm (9.8 inches) |
| Overall length | 1,400 mm (55.1 inches) |
| Seat height | 678 mm (26.7 inches) If adjustable, lowest setting. |
| Dry weight | 35.0 kg (77.2 pounds) |
CH Racing CH 509 Pro Senior dimensions and frame | |
| Rear brakes | Expanding brake (drum brake) |
| Front brakes diameter | 175 mm (6.9 inches) |
| Front brakes | Single disc |
| Rear tyre dimensions | 2.50-10 |
| Front tyre dimensions | 2.50-12 |
| Rear suspension | Single shock absorber |
| Front suspension | Telescopic hydraulic fork |
Speed and acceleration | |
| Power/weight ratio | 0.3429 HP/kg |
| Category | Minibike, cross |
| Year | 2009 |
| Model | CH Racing CH 509 Pro Senior |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Color options | Blue/yellow |
| Fuel capacity | 2.80 litres (0.74 gallons) |
Performance Profile & Rider Fit
12 hp
Peak Power
Best For
Track70%
City5%
Cornering80%
Daily Riding5%
Touring3%
Passenger0%
Rider Profile
| Best For | This tiny two-stroke cross minibike is best suited to young or lightweight riders, from beginners learning race craft to experienced racers using it for pit-bike style competition. |
| Purpose | Built purely for minibike motocross and pit-bike racing, it exists to deliver sharp, playful off-road performance in a miniature package rather than any kind of transport. |
| Rider Fit | With a 678 mm seat height, 40 kg dry weight, and compact proportions, it is only realistically comfortable for children, teens, or smaller adults who fit its scaled-down ergonomics. |
| Character | It has the eager, high-revving, two-stroke personality of a proper race-bred minibike, feeling nimble, flickable, and full of character despite its tiny displacement. |
| Not Ideal For | It is not suitable for taller or heavier adults, highway or street use, touring, carrying passengers, or anyone wanting comfort and long-distance capability. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
Rider Reviews
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