Originally Posted by Slowcrash_101

Ok I'm sure you know best, the OEM valve springs will work up to ~9,300rpm before they start floating. Honda made a really good compromise with the springs, the rate/seat pressure is enough to run at engine speeds that will outflow the head.

Not to mention OEM is proven to last 200k+ miles, again do what you want. If you want to accelerate wear and lose power up top from increased friction, go right ahead chances are you won't notice it on the butt dyno.

The OEM springs have no problem with FI, but who knows maybe you want to run some crazy cams and want a 9,500 rpm redline, and are willing to spend the $6,000 to get there, and are willing to live with lower reliability. Then yeah you'll need "upgraded" springs.

That's all I'll say regarding that.

Originally Posted by windhund116

Remember, this is company that had engineers who designed motorcycle and F1 engines that redline well over 17K R's. I think they know what they are doing.