YZ125 / YZ125X Freight Train Performance Package:

Fits: 2005+ YZ125, 2020+ YZ125X

Base package includes the following. Please click on each product for detailed descriptions:

Lectron Pro 38 Carburetor
DRT Cylinder Head Kit (outer head, 1 dome, copper washer kit, 3 piece o-ring kit)
Boyesen High Torque RAD Valve Performance Intake
Funnelweb Air Filter

Upgrade Options:

Anodized Lectron Pro 38
Anodized DRT Cylinder Head
Additional DRT Domes
Boyesen Supercooler High Flow Coolant Pump
Boyesen Works Edition Factory Clutch Cover
Boyesen Works Edition Factory Ignition Cover
BeRAD Front Brake Reservoir Cover
Spare copper washers (cylinder head)
Spare o-rings (cylinder head)

Want to make your YZ250(X) an absolute weapon? It all starts at the airbox. The Funnelweb Pro-Line Air Filter provides twice the surface area over standard filters. This means more air flow and protection from dust. After air passes through the filter, it's sent through the gate of power: The Lectron Pro Carb. This carburetor uses a steep bore taper to maximize air velocity, creating a stronger, more responsive pull from your engine. Idle to over-rev, this carb RIPS! With its special X-Rod metering technology, you don't have to worry about swapping jets...It doesn't have them! With this design, the carb also compensates for temperature and elevation extremely well so your bike stays running crisp and strong. Externally adjustable Torque Jet and Power Jet screws allow you to independently tune the bottom and top end fueling without even having to shut the bike off! When that carb opens up, the air rushes through, accelerating into the intake. The Boyesen High Torque RAD Valve gulps in air/fuel mixture velocities of over 500mph at over 200 times per second. Its multi-staged reed petal stacks feature Aerospace carbon material interwoven into tension combinations that maximize power delivery and peak horsepower. Integrated into the Rad Valve's seamless interior chamber are 4-way aerodynamic directional dividers that distribute the angled charge evenly without flow loss. Each channel has its own unique Power Profile, scientifically shaped to produce instant, explosive movements of air. Beyond the RAD Valve, the air/fuel mixture enters the cylinder. This is where the DRT Cylinder Head comes in. The cast OEM cylinder heads large squish clearance can lead to tuning woes, detonation, poor fuel economy and throttle response, and less power. The billet aluminum DRT head is a 2 piece design that gives you multiple combustion chamber insert options that can easily be swapped to have the bike produce the power you need, when you need it. It fixes the shortcomings of the stock head, looks incredible, and gives a large boost in performance without sacrificing ride-ability.

From the airbox to the combustion chamber, this Freight Train Performance Package brings you everything you need to get your YZ250(X) running like an absolute weapon for motocross, enduro, and anything else you decide to throw at it. Give your bike the performance it deserves!