I have a bmw k1200r and am looking to get the head optimized. I have a spare head and looking at it the casting is pretty good already.

Valve angles are tight at 11 and 10 degrees, exhaust and intake.

The "short side" radius is nearly straight and flat into the combustion chamber.

You can see the obvious "production" nature of the head with a distinct transition between the machined valve and the cast runner, but other than that, I don't see much can be done.

The combustion chamber has sharp edges that probably should be softened and maybe a little unshrouding.

Am I wasting my time and money? Are modern motorcycle heads pretty much "maxed out" without spending thousands.

if you are looking for better low down grunt,
then ..set .. the exhaust valves 20-40 thou deeper in to the head, than standard

this will go a little way in altering the flow of the incoming charge,.

because the exhaust valve is now  ..below..the inlet valve, the charge tends to ..go over.. the exhaust valve(ball valve) ,and not ..thru it..  So more mixture goes into the cylinder to produce more power

i.e,  overlap conditions,[both valves open together] the trade off ,is a little less poke at the top end,but a little more at the bottom /mid range

i have this mod on my car, and it pulls from below idle now, where as before it would not pull well till about 1100rpm

** this was done on a 2 valve flat roof combustion chamber,so might not work as well on a hemi head.

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