One of the many things I like to try is modifying the inlet valve timing during riding. I will test to find the best timing for FE. This can be early valve closing like the Metro XFi camshaft or late closing to create Atkinson effect like used on the Toyota Prius.
To be able to test that I am making a mechanism that allows timeshift from the handlebar.
I split the inlet cam from the camshaft and drive the inlet cam via a gear train from the rest of the camshaft. Now the cams run a different direction. By turning the housing of the gearset around the camshaft center I can change the inlet timing.
Here the gear set that goes into the housing.
