The CRF250X is reliable and trusted as a great entry level machine. For this build we customized it for a shorter female rider while getting the power up. The stock 250X is really corked down, but the potential is there.

For the bikes with more time on them in need of a bit of a rebuild, Cylinder Works/Hot Cams made this bike as fast and strong as an R model with a few mods. Since we were doing a piston anyway we went with the Cylinder Works BB kit that just gives a bit more power and does not require any case modifications. The Air-box was cut open and pink wire cut for added revs on top.

We also removed backfire screen and here is the video link to show how easy that is to do. With the Air-box and carb all modified we were able to install our full Yoshimura exhaust.

We utilized the Applied Smog elimination kit and also had the odometer removed and R model front axle installed in place. 

Jetting

CRF250X with opened up airbox and exhaust installed.
45 Pilot
42 Leak
170 Main
Needle  (R needle) in #2 Honda #16203-MEN-671
Two turns out on Fuel Screw  

Cylinder Works

www.cylinder-works.com
1mm Big bore Cylinder Kit 256cc
Includes Forged Vertex Piston and Top-End gasket kit 

Hot Cams

www.hotcamsinc.com
Stage two cam

Supersprox

www.supersproxusa.com
Front Sprocket
Rear Gold Stealth Sprocket
Gold Enduro O-Ring Chain

All Balls

www.allballsracing.com
Carb Rebuild kiy

Yoshimura

www.yoshimura-rd.com
Full Exhaust system 

Factory Connection

www.factoryconnection.com             
Suspension rebuild and service. Bike was lowered 1/2 both ends for the shorter rider.

IMS

www.imsproducts.com
Core Footpegs
Larger Tank 3.2 gallon  

DeCal Works

www.decalmx.com
Semi-Custom Graphics kit
Pre printed number plates backgrounds

UFO Plastic

www.ufoplasticusa.com
Full plastic kit  

Works Connection

www.worksconnection.com
Factory II  Stand
Front & Rear brake cap
Rotating bar clamp front brake
Steering stem nut
Radiator Guards 
Chain Blocks
Full Clutch Perch  

Dunlop Tire                        

www.dunlopmotorcycle.com
AT81 front  90/100-21
AT81 rear 110/100-18 

Uni Filter

www.unifilter.com
Two-Stage Air Filter

TM Designs                                          

www.tmdesignworks.com
Rear Chain Guide
Rear Disc & Caliper guards
Skid Plate 

Hinson Clutch Components

www.hinsonracing.com
Full Clutch pack and outer cover

Moto Seat     

www.motoseat.com
Custom Cool seat cover and cutting of the seat foam for shorter rider.

Motion Pro

www.motionpro.com
Titan Throttle Tube
Grip Glue

Renthal       

www.renthal.com
604 Fat Bars
Dual Compound Grips

Tusk

www.tuskoffroad.com
Complete Wheel set
Oversized Rotor/Adaptor Bracket
Rotor rear
Hand guards with blinkers built in
Dual Sport kit 

Pro Moto Billet

www.promotobillet.com
Kick-It Kick stand. Shortened for the shorter bike.