All items contained within this portion of the Dynoman website are manufactured specifically for 1977-78 Honda CB750F motorcycles (black engines). 

For all other CB750s, please visit our
SOHC section for 1969-76 Honda CB750 and 77-78 CB750K for silver engines.
 

2008 model DP836:

For 1977-78 Honda CB750 F2 (Black Motor)

Kit comes complete with pistons, rings, pins, clips, and head gasket.

As the 1977-78 Honda CB750 F2 has an 18% larger combustion chamber to compensate for the larger valves, through the years many people have installed the standard 836 (ex: Wiseco K836) kits for the 69-76 engines only to discover that the compression was too low to give them the extra power that they were after.

Dynoman now offers our new custom 836cc piston kit for the F2. It has the correct dome to raise the compression to a true 10.26:1. This kit has the same compression ratio that the 1969-76 models have with the K836 Wiseco kits.

These new pistons are state of the art diamond cut on CNC machines from 2618 aluminum forgings. This is the same alloy used in many prostock pistons. This process makes them lighter than some of the cast pistons used in the 70s, but much stronger. They also come with a brushed dome to smooth any sharp edges.

They have shorter piston pins for less weight and large valve pockets for the 31 and 34mm valves used in the F2 engines.

They are the same bore size as the standard Wiseco K836cc kit, so they are a drop in for any F2 with the standard K836 Wiseco kit already installed.