Big Bore Kits

Latest Dirt Bike Big Bore Kits Reviews – You could win up to $500 for reviewing products!

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  Athena Big Bore Kit

  WILLIAM in CA

  '05 WR250F -- What a Difference!

  With the Athena kit it's a whole 'nother bike! Roll on the power in 3rd and lift the front wheel. Power is smooth and she pulls right up to the rev limiter. Install was easy. Ceramic coated piston, quality gaskets. Excellent Product!

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  Wiseco Big Bore 440 Kit

  tyler in OH

  KFX 400

  for the money its worth it! my 400 has about every mod you can think of. before i could compete with the 450's! now i can blow them away! even some 500's!

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  Cylinder Works Big Bore Cylinder Kit

  Taylor in AL

  Awesome kit

  The cylinder works kit is a very reliable upgrade over stock. Comes with everything necessary to install it. There's no replacement for displacement!

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  Dubach Racing Engine Relocation Kit

  Mike in ID

  DON'T HESITATE JUST BUY IT

  I WAS A LITTLE SCEPTICAL ABOUT THIS PRODUCT. HOW COULD MOVING THE MOTOR 2.5mm MAKE THAT MUCH DIFFERENCE? AFTER READING SEVERAL REVIEWS ON LINE AND IN MAGAZINES I DECIDED TO GIVE IT A TRY. I COMBINED THIS PRODUCT WITH A MAXISS EN FRONT TIRE AND WOW WHAT A DIFFERENCE. I AM 250 lbs AND DIDN'T HAVE NEAR THE TROUBLE WITH THE "DARTING" THAT ALOT OF OTHER YZ OWNERS COMPLAIN ABOUT. THIS TOOK ME FROM REALLY LIKING MY BIKE TO LOVING IT. DON'T HESITATE. JUST BUY IT. INSTALL WAS FAIRLY EASY USING THE VIDEO ON THE DRD WEBSITE.

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