KDXRIDER.NET

building up an extremely well used and neglected 1990 KDX200, and the cylinder and piston is toast. which piston does well in these bikes?

OEM?

Pro-X?

Wiseco?

Other??


this is my first Kawi. i use Vertex and OEM in my previous bikes, YZ's, CR's, KTM's. some Wiseco, but I'm not a big fan of forged pistons. only used them when i needed to for high performance builds.

I'm also going to have the cylinder replated too. going to try out U.S.Chrome this time around. i read they give AMA discounts. have used Millennium in the past. never had a problem with them. anyone have experience with U.S. Chrome?

Thanks!

No experience with Chrome and like you, I have use Millennium. If you can get better pricing then I would not hesitate to send to Chrome as I have heard just as many good things about them as Millennium.

On piston, I have used Vertex the most and them Wiseco. Never used OEM so cannot say.


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so there IS a Vertex available for a 90 KDX?

where did you buy yours?


edit:
i searched again and it doesn't look Vertex are available for my bike.

I'm leaning towards OEM.

OEM works fine

Thanks!

I'm looking for durability. Not worried if it's 20 bucks more.

I just finished removing all the studs from the cylinder. Power valve parts look so so. The gears are a bit beat up. Maybe I should put in a set of those stainless steel ones from that UK vendor. I could run these ones, but I can't help but think that once these wear out completely the stainless steel ones might not be around anymore.

You may wish to read around the internet on replating vendors. I might not stray from Millenium.

Jason wrote:You may wish to read around the internet on replating vendors. I might not stray from Millenium.

I agree. Langcourt does pretty good work as well, though. For your piston, Pro X IS OEM. If you want something forged then go with the Wiseco. Either option works great in the 200.

Wiseco is a good choice or if you want something very nice get a Wossner.

I've used Wiseco from a CR250R down to a PW80. No problems so far and for what it's worth my local machine shop uses their stuff too.

Good Luck!