The cylinder head has got a couple of seasons track record with very good results (winner of the Nordic Supermono Cup 2009) with high power and outstanding reliability. However, if I would have done it today, there are still some things I would change for even better performance. I'm planning to manufacture another 2 pieces for myself. They will have:
-OEM positioning of the exhaust valves (keeping OEM rocker arm)
-32-32,5mm exhaust valves and porting/aligment to use any after market exhausts
-Repositioned 40-41mm stainless inlet valves, including billet rocker arm (OEM rollers and adjustment screws)
-OEM valve guides (upgraded with liners), rocker shafts, valve cover etc
The cost will be possible to reduce if making more than just a couple. I guess it will be less than 2000â‚¬, but that has to be calculated once knowing how large the "series" will be. Keep in mind that you will also need a larger carb (45-50mm) to get value for the investment. I you feel restricted to the 41mm, my financial advice to you is to buy beer or fire crackers instead.
So if anyone of you guys thinks this sounds interesting, send me a PM and I'll keep you updated! If I get around 10 orders, the cost can really be reduced!
/Dr_C (speciality: Breathing)
See my gallery for pics, Dr_C is quite logically sorted in the "S"-section