Garage Build
Garage Build 2019 HONDACRF250R BIG-BORE
Garage Build 2019 HONDACRF250R BIG-BORE
Garage Build
2019 HONDACRF250R BIG-BORE
BIKE BUILD BY JAY CLARK // www.jayclarkent.com
WORDS: DAVID PINGREE
PHOTOS: SIMON CUDBY
We set Race Tech free on our Honda CRF250R to build us an engine worthy of a vet race machine or a pro practice bike.
CYLINDER WORKS
3mm Big-Bore Cylinder Kit 269cc, Includes Forged Vertex Piston and Top-End Gasket Kit
cylinder-works.com
RACE TECH
Suspension Re-Valve and Setup, Vortex X-10 ECU and Mapping, Head Porting
racetech.com
SUPERSPROX
Rear Sprocket, Front Sprocket, Gold MX Race Chain G520-MXT-L-120
supersproxusa.com
UNI FILTER
Two-Stage Air Filter
unifilter.com
HINSON
Fiber Spring Kit and Outer Cover
hinsonracing.com
FMF RACING
Full Ti Powerbomb Headers with RCT 4.1 Mufflers
fmfracing.com
RENTHAL
604 Fat Bars, Tacky Grips
renthal.com
DUNLOP
MX33 Front (80/100-21)
MX33 Rear (110/90-19)
dunlopmotorcycletires.com
WORKS CONNECTION
Brake Caps, Works Stand II, Brake Rotating Bar Mount, Engine Plugs, Axle Blocks, Elite Clutch Perch, Master Cylinder Guard, Holeshot Device
worksconnection.com
DECAL WORKS
Semi-Custom Graphics Kit, Pre-Printed Number Plate Backgrounds
decalmx.com
UFO PLASTIC
Full Plastic Kit, Mud Flap
ufoplasticusa.com
TM DESIGNWORKS
Rear Chain Block
tmdesignworks.com
MOTOSEAT
Custom Cool Seat Cover
motoseat.com
ACERBIS
Skid Plate
acerbisusa.com
TUSK
Oversized Front and Standard Rear Rotor, Complete Wheel Set, Sprocket Bolts, Rotor Bolts
tuskoffroad.com
MOTION PRO
Grip Glue, Titan Throttle Tube
motionpro.com
SCAR
Titanium Footpegs
scar-racing.com
VP RACING FUELS
T4 or U4.4 Fuel
vpracingfuels.com
We set Race Tech free on our Honda CRF250R to build us an engine worthy of a vet race machine or a pro practice bike.
CYLINDER WORKS
3mm Big-Bore Cylinder Kit 269cc, Includes Forged Vertex Piston and Top-End Gasket Kit
cylinder-works.com
RACE TECH
Suspension Re-Valve and Setup, Vortex X-10 ECU and Mapping, Head Porting
racetech.com
SUPERSPROX
Rear Sprocket, Front Sprocket, Gold MX Race Chain G520-MXT-L-120
supersproxusa.com
UNI FILTER
Two-Stage Air Filter
unifilter.com
HINSON
Fiber Spring Kit and Outer Cover
hinsonracing.com
FMF RACING
Full Ti Powerbomb Headers with RCT 4.1 Mufflers
fmfracing.com
RENTHAL
604 Fat Bars, Tacky Grips
renthal.com
DUNLOP
MX33 Front (80/100-21)
MX33 Rear (110/90-19)
dunlopmotorcycletires.com
WORKS CONNECTION
Brake Caps, Works Stand II, Brake Rotating Bar Mount, Engine Plugs, Axle Blocks, Elite Clutch Perch, Master Cylinder Guard, Holeshot Device
worksconnection.com
DECAL WORKS
Semi-Custom Graphics Kit, Pre-Printed Number Plate Backgrounds
decalmx.com
UFO PLASTIC
Full Plastic Kit, Mud Flap
ufoplasticusa.com
TM DESIGNWORKS
Rear Chain Block
tmdesignworks.com
MOTOSEAT
Custom Cool Seat Cover
motoseat.com
ACERBIS
Skid Plate
acerbisusa.com
TUSK
Oversized Front and Standard Rear Rotor, Complete Wheel Set, Sprocket Bolts, Rotor Bolts
tuskoffroad.com
MOTION PRO
Grip Glue, Titan Throttle Tube
motionpro.com
SCAR
Titanium Footpegs
scar-racing.com
VP RACING FUELS
T4 or U4.4 Fuel
vpracingfuels.com
2019 HONDA CRF250R BIG-BORE tailpipes
2019 HONDA CRF250R BIG-BORE side view
2003 SUZUKI RM125
A

ndrew at Race Tech Engines is fast becoming one of the top engine builders in the West, and we gave him our CRF250R kit out with a Cylinder Works big-bore kit. The Honda is a great bike, but it’s just a bit slow in this class. These mods give the motor plenty of bark while keeping the reliability almost as good as stock. The motor still runs the stock cams and valve train, so durability is excellent. We also removed the backfire screen. Race Tech is obviously known for suspension, and they nailed it on this old-guy setup. DeCal Works and MotoSeat did a great job with the look of the bike, and we used some fantastic companies to complement many of these performance mods. Renthal, Dunlop, Works Connection, and Scar all provided parts that were collective cherries on top of this little red machine.

On the track, the bike is a blast. The additional torque digs out of turns and up hills much better than the stock bore. The revs are good, though they could be much better with aftermarket valves and cams. However, our goal wasn’t maximum performance but increased performance without decreasing durability. No part of the engine is worse than stock—just improvements. The suspension is great, and the overall handling is phenomenal. The Honda has always been a comfortable bike anyway—we just polished it even further. This is a fun bike to ride and something to look at if you have the same goals we did. A very special thanks to www.perrismx.com for having us out on the track.

2019 HONDA CRF250R BIG-BORE Hinson and pegs
2019 HONDA CRF250R BIG-BORE turning on the track
2019 HONDA CRF250R BIG-BORE handle bar
2019 HONDA CRF250R BIG-BORE wheel
2019 HONDA CRF250R BIG-BORE side panel