I literally just book marked the page you suggested. I'm also leaning toward an earlier bike, square tube just doesnt seem as strong as round tube . & I like what you said about old school comfort, I need a real seat for what I'm thinking.
Yeah, I can ride all day on my E with no problem. The ergos and couch type seat make it super comfy.
Know anything about big bore or stroker's. How hard can you breathe on a KDX
You can do quite a bit on them. I did pretty much everything except for porting and a BB kit. Pipe, reeds, RB head and carb mods, Jaguar ignition, etc. I haven't felt the need for a BB or porting as my engine has plenty of power. I can run with my buddies on the trails with ease who ride new KTM's (200, 250, 300, and a 525), Honda 450's, YZ250, and Husky TE310. They only time it would be nice having more power is long straightaways and deep sand washes. However, the downside of the mods to get more power is just not worth it IMO.
The largest BB I have seen is 240cc but you lose your power valves and, IMO, that is just too steep a price. Plus, to rebuild the top end down the road, piston/ring costs more and is limited to who you bought the BB from. I have never heard of or seen a stroker for the KDX. I would guess that you might be able to get someone to stroke it but there isn't much room in the case as the KDX 200/220 are already a bored and stroked KX125 engine. Finally, I know Eric Gorr and Jeff Fredette do port work on the KDX's. I have heard you can get some noticeable gains from it but I haven't tried it.
Your blue & white bike looks sweet might I add
Thank you!