170cc / 63mm Big Bore Kit w/ VM26 Carb Kit - All KLX140 gpx the smaller size on the

the smaller size on the tool is 25mm and the larger size is 30mm

This is very easily done with a small Dremel tool

or 184cc Big Bore and Carb Performance Kit for YX/GPX/Zongchen 150cc/155cc/160cc Engines Part Number: TBW9041

This item will prevent mud and dirt from reaching the rear shock and air filter

Body diameter = 4

170cc / 63mm Big Bore Kit w/ VM26 Carb Kit - All KLX140 gpx the smaller size on theTB Parts 170cc 63mm Big Bore Kit w VM26 Carb Kit TB Parts 170cc Bore Kit with the Mikuni VM26 performance carb kit. These parts work great together for an unmatched performance increase. Starting with the complete big bore kit you get a lightweight high compression piston that is 5mm over stock making close to 50% more power. Add the 6mm larger VM26 carburetor (that utilizes the stock air box) and the bike will not only start up and idle better but it