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Racer X Tested: 2014 Honda CRF450R


Video by Simon Cudby

Words by David Pingree

While Honda’s 2014 CRF450R is an incredible motorcycle, it has a couple of character traits that, for some, could be improved. Some riders feel like the CRF doesn’t have enough horsepower. I think that’s a ridiculous notion, but just to humor folks, we went ahead and turned this smooth, tractable power plant into a big-bore 478cc animal. When we finally bolted this thing together, we had one amazing-looking machine. Every last detail had been considered, and the last thing left to do was put it to the test on a track. We headed to Pala Raceway to make that happen. Check out the video for a complete rundown.

  • Parts list:

Cylinder Works

  • 3mm Big Bore Cylinder Kit 478cc
  • Includes Forged Vertex Piston and Cometic Top-End Gasket Kit


Hot Cams

  • Stage Two-Cam




  • Factory 4.1 RCT Ti Muffler
  • Ti Megabomb Header




  • Throttle Body Modifications




  • Reprogram of Stock ECU




  • Formed Red Silicone Coolant Hoses
  • High-Pressure Radiator Cap


Dunlop Tire

  • MX51 Front 80/100-21
  • MX51 Rear 120/80-19



Cycra Racing

  • Powerflow Complete Plastic Kit With New One-Piece Side Number Plates
  • Complete Custom Graphics Kit
  • Stand
  • Hand Shields



  • Custom Seat Cover


Works Connection

  • Front Brake Cap
  • Rear Brake Cap
  • Radiator Braces
  • Chain Blocks
  • Engine Plugs
  • Oil Filler Plugs
  • Rotating Font Brake Mount
  • Hour Meter and Mount
  • Ti Footpegs



Hinson Clutch Components

  • Inner Hub/Pressure Plate Kit
  • Billet Clutch Basket
  • Fibers, Steels, and Springs
  • Outer Cover



Streamline Brakes

  • Steel Braided Brake Lines
  • Oversized Front Brake Rotor
  • Mounting Bracket
  • Rear Rotor
  • Reflex Front Brake Lever



RK Chain

  • Chain




  • Rear Brake Pedal With Ti Tip
  • Shifter Lever With Rubber Tip
  • Rear Brake Clevis



  • Excel A60 Rims
  • Signature Series Hubs
  • Spokes and Nipples



Factory Connection

  • Complete Re-Valve and Setup


Pro Taper

  • EVO Bars (Reed/Henry Bend)
  • Oversized Clamps
  • Twister Throttle Tube
  • Profile Pro Clutch Perch/XPS Lever




  • Soft Pro Compound Half Waffle Grips




  • Rear 48-Tooth Sprocket




  • Lubricants and Oil




  • Air Filter
  • Oil Filter Cover