Polini 911 H2O - 2005 Specifications and Reviews

The 2005 Polini 911 H2O is a lightweight sportminibike designed for young riders and beginners seeking an entry-level racing experience. Powered by a liquid-cooled two-stroke engine producing 6.2 horsepower, this compact machine weighs just 23 kg and excels in amateur competition and training environments. Known for its nimble handling and affordable performance package, it remains a popular choice for introducing riders to motorsport fundamentals.

2005
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Engine and Transmission Specifications

ClutchDry with centrifugal counter weights
Cooling systemLiquid
Fuel systemCarburettor
Bore x stroke36.0 x 39.0 mm (1.4 x 1.5 inches)
Power6.20
Engine typeSingle cylinder, two-stroke
Capacity:39.70 ccm (2.42 cubic inches)
 
 

CategoryMinibike, sport
Year2005
ModelPolini 911 H2O

Brakes, suspension, Frame and wheels

Rear brakesSingle disc
Front brakesSingle disc
Frame typeReinforced die cast light alloy

Physical measures and capacities

Seat height455 mm (17.9 inches) If adjustable, lowest setting.
Power/weight ratio0.2696 HP/kg
Dry weight23.0 kg (50.7 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

6.2 hp
Peak Power

Best For

Track75%
City20%
Cornering80%
Daily Riding10%
Touring5%
Passenger0%

Rider Profile

Best ForBest suited to riders who already have two-wheel experience and want to sharpen throttle and body-positioning skills on a minibike rather than a first-time beginner machine.
PurposeThis is a pit-bike style minibike built purely for playful mini-moto track days, backyard fun, and honing cornering technique at low cost and low risk.
Rider FitIts tiny 455mm seat height and 23kg dry weight mean it is only comfortable and controllable for smaller or lighter riders, typically kids or petite adults.
CharacterExpect a buzzy, high-revving two-stroke character that rewards aggressive, playful riding despite its very modest outright power.
Not Ideal ForThis is not the bike for taller or heavier adults, highway commuting, touring, or anyone needing a passenger or genuine off-road capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Reviews

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