dirt bike Big Bore Kits

Latest Engine Reviews – You could win up to $500 for reviewing products!

• 

  Cometic Top End Gasket Set

  Titus in AZ

  Way better than I thought

  Doing a rebuild on my entire motor needed just a head gasket so got this thinking I should replace all my seals for the price I wasn't expecting everything to be this amazing all the rubber seated perfectly definitely worth the money.

  Read All Reviews
• 

  Tusk Clutch Cover Gasket

  Chris in MI

  QUALITY and Affordability at a 1 piece Price

  Nice OEM Quality, at a Great 1 piece Price. Keeps People Riding Affordably. I recommend this Part especially when having to do Constant Clutch maintenance or Replacement Due to Hard Racing.

  Read All Reviews
• 

  Tusk Top End Gasket Kit

  Branden in WA

  Top end gasket kit

  Awesome gaskets. Got the top end back together on the ktm 50! Thanks

  Read All Reviews
• 

  Wiseco Piston Kit

  Jack in ID

  Great pistons

  I love wiseco pistons. They always fit well, they look great (which feel reassuring when doing the top end rebuild). I will always buy wiseco pistons.

  Read All Reviews
• 

  Steahly Heavy Flywheel Weight

  Wyatt in AZ

  11oz really mellowed out the YZ250X

  Changed the riding characteristics of the bike completely. Really mellowed out my YZ250X build. Still hits hard up top but much more single track friendly down low.

  Read All Reviews
• 

  Hot Cams Valve Shim Kit

  David in OK

  Shims are Great

  These shims are super handy. They have all the sizes you need in a convenient organizer. Great quality product that cant be beat in my opinion.

  Read All Reviews