The “SS” in the 2021 EVO 2T 300 SS Beta Dirt Bike stands for Super Smooth, which means that thanks to the additional weight on the flywheel for enhanced inertia and other minor measures, it is more manageable to medium-low revs. The dirt motorcycle still makes the SS extremely easy and entertaining to ride and its overall review is given below.
2021 EVO 2T 300 SS Beta Dirt Bike – Features
Engine Features
The new 2021 EVO 2T 300 SS Beta Dirt Motorcycle has a potent 296.5ccm single-cylinder and two-stroke engine. The overall compression ratio has been set at 10.1:1 while the bore to stroke ratios has been set at 79mm and 60.5mm, respectively. The lubrication system has a 1.5% oil mixture to ensure the lowest possible friction level. The gearbox comes with a 6-speed transmission system to provide an excellent gear shifting experience better than 2019 EVO 300 SS Beta.
Chassis Features
The new 2021 EVO 2T 300 SS Beta Dirt Bike features a single solid wave hydroformed aluminum beam frame type, offering impressive stability throughout the ride. The suspension system features a hydraulic fork with a 38mm shaft in the front while the rear has a hydraulic mono-shock. The braking system comprises a single disc with four-piston calipers in the front during a single disc with two-piston calipers.
2021 EVO 2T 300 SS Beta Dirt Bike – Technical Specifications
Engine and transmission
| Displacement | 296.5 ccm (18.09 cubic inches) |
| Engine type | Single cylinder, two-stroke |
| Engine details | Lamellar induction in the crankcase |
| Compression | 10.2:1 |
| Bore x stroke | 79 x 60.5 mm (3.1 x 2.4 inches) |
| Fuel system | Carburetor. Keihin PWK ø 28mm |
| Ignition | Electronic Hidria |
| Lubrication system | 1.5% oil mixture |
| Cooling system | Liquid |
| Gearbox | 6-speed |
| Transmission type | Chain (final drive) |
| Clutch | Wet multi-disc clutch with cush-drive rubber |
Chassis, suspension, brakes, and wheels
| Frame type | Single wave hydroformed aluminum beam |
| Front suspension | Hydraulic fork with ø38 mm shaft |
| Front-wheel travel | 165 mm (6.5 inches) |
| Rear suspension | Hydraulic Monoshock |
| Rear-wheel travel | 180 mm (7.1 inches) |
| Front tire | 2.75-21 |
| Rear tire | 4.00-18 |
| Front brakes | Single disc. Four-piston calipers. |
| Diameter | 185 mm (7.3 inches) |
| Rear brakes |
