New Old Stock (NOS) Yoshimura Power Up Bore Kit for XR100's! Part number 288-409-2000. Everything is as is from the box minus the carburetor, air filter, and velocity stack. Everything else that's originally included with the kit is there just minus those three items. This kit is super rare, the inventory date shows 7/31/2006! You could run other slide carburetors with this kit, which you would need to source. 


Power Up Kit for the XR100RR is great for Supermoto, or anyone who wants the MOST power out of their 100cc Mini-Bike

Power Up Kit Includes:

  • cylinder with side oil ports
  • piston
  • piston rings
  • Yoshimura ST-1 camshaft
  • Rubber Grip Set
  • Throttle Cable
  • CNC Intake Manifold
  • All necessary gaskets

This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and Aftermarket accessories not found on a bike as delivered from the factory, may not be compatible with this product.

Attention International Customers: This product was designed and tested to be compatible with vehicles in the U.S. marketplace only. Compatibility including fitment and performance may vary by marketplace.

Vehicle Fitment

  • Honda XR100R 2005
  • Honda XR100R 2006
  • Honda XR100R 2007
  • Honda XR100R 2008