Due to the manual process, only 25 engines a day can be created. Our sources have confirmed that their are now 5 mechanics working full time on port and polish. This is a feature that is said to be impossible to do in mass-production. This prevents the surging effect at high rpm's, and avoids any interference with the pistons. The cut-off area of the springs are done with the most extreme care.
Bigger valves have their advantages, but are heavier.
We asked Mr. Suga for any other advice on tuning the Type R any further. Each upgraded part works in perfect harmony, and fiddling with the factory setting will only lead to a decrease in performance. In order to make exhaust air flow smoother, there are no sharp angles in the header. Impossible to do in mass-production, all exhaust piping is welded together with no sharp edges throughout. Also, the piping was upgraded to 57.2mm throughout to increase air flow.