Originally Posted By donaldosaurus
I now need more horses. Air ducting has to help.


Great pictures Donald.

Good luck with the quest for those horses. Others here will shoot me down, but If you go the classic air intake/filter/exhaust route you can spend money on a Sigma car to very little effect. Because this doesn't address the weak link in the standard set-up.

What you have is half a Yamaha-designed race engine, with a designed-to-the-lowest-cost Ford induction system. It's why throwing away the plastic inlet plenum and sticking on throttle-bodies works so well on these little engines.

...Then it's time to look at getting in more cold air and getting the exhaust out (manifold, sports cat, shorter resonator/sports exhaust/side exit etc)

Stuart
"There's no skill substitute like cubic inches."