Q4: Stock piston? KDX220

Discussion specific to the 1995 - 2006 KDX200 (H Series) and 1995 - 2005 KDX220R (A Series) models sold in the USA
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freeindeed
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Q4: Stock piston? KDX220

Post by freeindeed »

I just removed the piston from my 2001 KDX220.
Is this the stock piston? It has an arrow and the letter C on the top.



[URL=http://s758.photobucket.com/user/f ... .jpg[/img][/url]
Last edited by freeindeed on 12:40 pm Apr 11 2018, edited 7 times in total.
Jim B
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Re: Q4: Stock piston? KDX220

Post by Jim B »

Kinda looks stock/cast. Just about every Wiseco piston I've seen has quite a few numbers laser engraved on the top. What does the underside look like? Does it say 'Art'? (I think that's what the stock piston says, not 100% sure.) The forged Wiseco looks forged on the underside (not surprisingly :razz: ). IIRC, the Wisecos have a 'W' on the underside. I'm pretty sure that's stock; don't think it's a Wiseco.
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Re: Q4: Stock piston? KDX220

Post by KDXGarage »

I think it is stock, as OEM has the letters. Grab a sheet of paper from the printer. Place it on a shelf. Turn piston upside down and put on paper. You now have a parts holder. Please do not put anything heavy in the partsholder, as the parts holder has been known to shatter, especially when ran for 17 years. :razz:
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freeindeed
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Re: Q4: Stock piston? KDX220

Post by freeindeed »

Jim B wrote:Kinda looks stock/cast. Just about every Wiseco piston I've seen has quite a few numbers laser engraved on the top. What does the underside look like? Does it say 'Art'? (I think that's what the stock piston says, not 100% sure.) The forged Wiseco looks forged on the underside (not surprisingly :razz: ). IIRC, the Wisecos have a 'W' on the underside. I'm pretty sure that's stock; don't think it's a Wiseco.
Inside the skirt it says "SK" and "2". There is a checkerboard pattern underneath the top. It does look like a sandcasting with some pitting. There are sharp edges and ridges. But I do not see the letters "ART".

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Re: Q4: Stock piston? KDX220

Post by Jim B »

Just about positive that's stock/cast. You're lucky that didn't grenade. The wear looks pretty minimal.
freeindeed
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Re: Q4: Stock piston? KDX220

Post by freeindeed »

I am glad too! The bike only has roughly 1250 miles on it since new.
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Q4: Stock piston? KDX220

Post by Molly's 70 »

That is definitely a stock piston. Mine has the "2" w the other marks just like yours on the inside, and the arrow with the "C" on the top.
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Q4: Stock piston? KDX220

Post by lucy »

So, I am in same situation. I need to replace OEM Piston in my 220. Are all the Wiseco pistons the same size? Or, do I need to correlate them with A, B, or C on my piston head?
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Q4: Stock piston? KDX220

Post by kx200 »

I too got lucky! I put 7500 miles on before I opened it up.
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Q4: Stock piston? KDX220

Post by KDXGarage »

lucy wrote:So, I am in same situation. I need to replace OEM Piston in my 220. Are all the Wiseco pistons the same size? Or, do I need to correlate them with A, B, or C on my piston head?
I think Wiseco just makes one standard sized piston. They don't do A, B, C, D. The non-standard sized pistons that Wiseco makes are (just for example), 0.5 mm, 1.0 mm, not 0.01, 0.02, 0.03, 0.04 mm like A, B, C, D.

There is one really cheap brand that almost everyone says to avoid. It might be Mitaka. I am not sure. Vertex, Wiseco and Wossner have good reputations. (and Pro-X, pronounced procks for some reason)
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Q4: Stock piston? KDX220

Post by Jim B »

kx200 wrote:I too got lucky! I put 7500 miles on before I opened it up.
Is yours a 200? (I'm guessing so by your username.) The 200 pistons don't grenade like the 220 pistons. That's still a lot of miles on a piston.
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Q4: Stock piston? KDX220

Post by kx200 »

Nope mine was a stock 97 220
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Re: Q4: Stock piston? KDX220

Post by KDXGarage »

Thanks for the follow up
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