All OEM Honda C90 Big Bore method (plus 13 - 25cc)

4:42 Explanation of power difference plus video
7:20 Video of riding comparison
7:49 Required parts
23:06 Headgasket information
27:47 Cylinder head information
36:19 Head studs and misc hardware
49:22 Link to Oil Pump Information c90club.co.uk
50:38 Cylinder gasket information
51:08 Carburetors and Jetting
53:20 Genuine vs. Aftermarket carburetors
57:24 Misc Piston information
59:30 Closing comments

Welcome to an all Honda OEM method of modifying your Honda Super Cub C90, C70 or C50 into a 100cc + machine. This method addresses all the parts and things you need to watch for in order to reliably and smoothly get more power out of your Super Cub.

Note: Some parts shown in the walkthrough are aftermarket versions, but the information is what matters here. All these parts are available as OEM replacements from Honda dealers and part suppliers around the world.