125 RR X-PRO 2-Stroke
The Beta 125 RR X-PRO is a lightweight, high-revving enduro bike built for riders who want the excitement and precision of a true 2-stroke in a manageable package. Its 124.8cc liquid-cooled engine uses Beta’s Progressive Valve (BPV) system to deliver strong, responsive power throughout the rev range, while the 6-speed transmission gives you the gearing to tackle everything from tight technical trails to faster open terrain. For 2026, Beta updated the 125 with a new piston and engine head, improving combustion and making the engine more reactive and powerful.
The X-PRO chassis is designed around confidence and control, with a chromoly steel double-cradle frame and adjustable Sachs suspension at both ends. The 48mm Separate Hydraulic Chamber front fork offers adjustable spring preload, compression, and rebound, while the rear shock provides adjustable rebound and high/low-speed compression. With 21"/18" wheels, Maxxis Enduro tires, a 260mm front brake, and 240mm rear brake, the 125 RR X-PRO is equipped to handle demanding singletrack and technical off-road riding.
At just over 200 lbs dry, the 125 RR X-PRO combines the lightweight feel of a small-bore 2-stroke with the full-size chassis and suspension of a serious enduro machine. Whether you're learning the fundamentals of off-road riding, developing your technique, or simply looking for a lightweight bike that rewards an aggressive riding style, the 125 RR X-PRO delivers the balance, responsiveness, and rideability that Beta is known for.
Engine: 124.8cc liquid-cooled single-cylinder 2-stroke with BPV power valve
Bore x Stroke: 54mm x 54.5mm
Fuel System: Keihin PWK 36mm carburetor
Lubrication: Premix
Transmission: 6-speed
Clutch: Wet multi-disc, hydraulic
Frame: Molybdenum steel double-cradle
Front Suspension: 48mm Sachs SHC, adjustable preload, compression & rebound
Rear Suspension: Sachs aluminum-body shock, adjustable rebound & high/low-speed compression
Front Travel: 11.6"
Rear Travel: 11.4"
Front Brake: 260mm floating rotor
Rear Brake: 240mm rotor
Wheels: 21" front / 18" rear
Tires: Maxxis Enduro
Seat Height: 36.6"
Ground Clearance: 12.7"
Fuel Capacity: 2.5 gallons
Dry Weight: ~207–228 lbs depending on model-year specification
The Beta 125 RR X-PRO is a lightweight, high-revving enduro bike built for riders who want the excitement and precision of a true 2-stroke in a manageable package. Its 124.8cc liquid-cooled engine uses Beta’s Progressive Valve (BPV) system to deliver strong, responsive power throughout the rev range, while the 6-speed transmission gives you the gearing to tackle everything from tight technical trails to faster open terrain. For 2026, Beta updated the 125 with a new piston and engine head, improving combustion and making the engine more reactive and powerful.
The X-PRO chassis is designed around confidence and control, with a chromoly steel double-cradle frame and adjustable Sachs suspension at both ends. The 48mm Separate Hydraulic Chamber front fork offers adjustable spring preload, compression, and rebound, while the rear shock provides adjustable rebound and high/low-speed compression. With 21"/18" wheels, Maxxis Enduro tires, a 260mm front brake, and 240mm rear brake, the 125 RR X-PRO is equipped to handle demanding singletrack and technical off-road riding.
At just over 200 lbs dry, the 125 RR X-PRO combines the lightweight feel of a small-bore 2-stroke with the full-size chassis and suspension of a serious enduro machine. Whether you're learning the fundamentals of off-road riding, developing your technique, or simply looking for a lightweight bike that rewards an aggressive riding style, the 125 RR X-PRO delivers the balance, responsiveness, and rideability that Beta is known for.
Engine: 124.8cc liquid-cooled single-cylinder 2-stroke with BPV power valve
Bore x Stroke: 54mm x 54.5mm
Fuel System: Keihin PWK 36mm carburetor
Lubrication: Premix
Transmission: 6-speed
Clutch: Wet multi-disc, hydraulic
Frame: Molybdenum steel double-cradle
Front Suspension: 48mm Sachs SHC, adjustable preload, compression & rebound
Rear Suspension: Sachs aluminum-body shock, adjustable rebound & high/low-speed compression
Front Travel: 11.6"
Rear Travel: 11.4"
Front Brake: 260mm floating rotor
Rear Brake: 240mm rotor
Wheels: 21" front / 18" rear
Tires: Maxxis Enduro
Seat Height: 36.6"
Ground Clearance: 12.7"
Fuel Capacity: 2.5 gallons
Dry Weight: ~207–228 lbs depending on model-year specification