Some need knurling, some don't. Rerouting the brake line isn't a big deal at all. You don't have to raise the forks if you have them internally shortened to match the stock KDX forks.
Pardon my ignorance. How do you shorten forks internally? Shorter preload spacer?
Also, some posts state that the 96-99 rm125/250 forks are the money. Others say it's 97-99. Which is it, as I'm looking at a set from a 96?
Yeah, I would suggest running the stock forks for a while to see if they will work for you. If you aren't crazy like me you just might like them. On the other hand, you can't go wrong with the upgrade!
The stock ones have blown seals. Are these standard rebuild ones? Drain oil, remove forks, remove dust seal, remove snap ring, hammer out old seal, use protection and install new seal, ring, dust and oil and pop em back in? Or do bushings get damaged and the whole thing needs revamped for $100 in parts and you need a 10' one-off tool to tighten down the bottom nut job? (Did I say that out loud?)
Since you're local I can help you if you need it. I have built so many bikes, street and dirt, it's ridiculous.
This gives me confidence enough to know I have backup that I probably do it. :win
Joy to the world!