146cc Big Bore Piston & Mikuni VM26 Kit - 14mm Piston Pin Engines - TBW9070 crf80 4x55mm bore and stroke and

4x55mm bore and stroke and a 14mm piston wrist pin

Includes New O-rings

and TB 28mm Carburetor Kit for KLX DRZ 110's 2002-2009

While the bore kit provides a nice power gain over stock

This is standard practice for just about any 20mm or bigger carb that you put on the bike

146cc Big Bore Piston & Mikuni VM26 Kit - 14mm Piston Pin Engines - TBW9070 crf80 4x55mm bore and stroke and146cc Big Bore Piston & Mikuni VM26 Kit 14mm Piston Pin Engines Part Number: TBW9070 141cc (57mm) Bore Kit and Mikuni VM26 Carb Kit for Chinese 120cc Engines with Big Valve Cylinder Heads (27 23mm or 30 23mm): Aluminum cylinder with steel sleeve High compression large dome 57mm piston with rings, 14mm pin, & clips Head gasket kit Genuine Mikuni VM26mm 606 Series Performance Carb (Not a cheap Chinese copy) Intake Kit Jet kit with 3 different sizes