Quote:
Originally posted by crs240sx:
What can I do, legally, to improve performance? I know I can port match the exaust and plain the head. Not sure how much I can take off the head though. I plan on running the early higher compression pistons at some point.
For sure you want to balance it. I don't know the KA24 well enough to know if there were other differences besides just the pistons. If there were, be careful. The rules specifically state that whole components must be changed and you can't just pick the best parts. If the only difference is the pistons, have at it.
Quote:
Originally posted by crs240sx:
What should I do at a bare minumum to freshen this piece up? What parts should always be replaced? Timing chain and guide, valve seals, etc?
If the KA chain is anything like the SR chain, it's pretty stout. However, it's relatively cheap enough that unless the chain is pretty new, I'd replace it. If the KA is like the SR, you should always replace the guides when you replace the chain. Replace all seals of course. I'd replace all bearings and rings as well.