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WSM forged pistons, good or bad?


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I just tore my motor down as it was so low on compression I don't know how it still started. 6 years of hard riding on the top end and it looks perfect, just well worn. Had the WSM forged pistons in there running 95% klotz r50 at 50:1. I'll snap some pics at the shop this afternoon.

I already bought a .040 over set of forged WSM's to go back in the motor  :cheers:

Now I just need to get the crank rebuilt or buy a new one as the big end bearings are as loose at a $2 hooker. 

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I read that cast pistons had better lifespan than forged piston but those WSM almost make me change my mind. A lot of place I read "All I use is wiseco", it's what i have and I feel going another route.

 

Debating pro-x, wsm (cast and forged), and wossner. 

 

How many hours did you ran it on in 6 years ? Also the top of my piston were a LOT cleaner than that with 32:1 hypertech SSS oil. Don't know if it's supposed to or not.

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Are they a true forged piston? I always thought wsm only made cast

 

Edit: after just seeing the pics, those look to be forged

 

 

They definitely make both forged and cast. I believe they have some shared manufacturing with Wossner.

These are definitely forged. They do make cast also. Wossner is WSM if I recall correctly. 

 

I read that cast pistons had better lifespan than forged piston but those WSM almost make me change my mind. A lot of place I read "All I use is wiseco", it's what i have and I feel going another route.

 

Debating pro-x, wsm (cast and forged), and wossner. 

 

How many hours did you ran it on in 6 years ?

 

Also the top of my piston were a LOT cleaner than that with 32:1 hypertech SSS oil. Don't know if it's supposed to or not.Seems like we can't edit posts... On their website wsm only list forged under "race pistons"  with added boost port. That's what you have ?

 

Anyone tried Vertex too ?

 

Don't know on hours, but probably 2500-3000 miles if I had to guess. That's how many miles are on my arctic cat 4x4 and it's seen about the same amount of butt time. 

 

These are the exact ones in the pics I bought from TDR http://www.bansheedepot.com/proddetail.asp?prod=16-5788

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