WSM Piston??
- Thread starter dnoftz
- Start date
No they are cast stay away from them, they are known for shattering, pay the extra 30 and go with Wiseco they are very reputable that's what most people on here run including myself. You want a forged piston not cast remember that.
My understanding is that nearly all of the cast pistons on the market (with the possible exception of namura) are manufactured by ART, the same company that makes the factory yamaha piston.
The truth about cast vs forged really only comes to light when an engine is ill maintained or used beyond its recommended service life without "freshening up".
Proper piston to cylinder clearance will allow a cast piston to run for many many hours with no trouble at all. A cast piston isn't ACTUALLY a ticking time bomb just waiting for a moment to explode. The real problem comes as a top end begins to get "loose" and the owner/operator continues to run it even with that piston slapping around in there instead of taking the top end off and taking it to a machine shop for a bore job. Eventually all the rocking of the piston can cause the *relatively* weak structure of the cast piston to break where a forged piston *MIGHT* survive that abuse.
With proper care and maintenance a cast piston CAN give a good long service life. That being said, I run forged pistons in pretty much everything I've ever taken apart (even my prairie 400 4x4
) Wiseco in stock bore top ends and a wossner in my BBK.
The truth about cast vs forged really only comes to light when an engine is ill maintained or used beyond its recommended service life without "freshening up".
Proper piston to cylinder clearance will allow a cast piston to run for many many hours with no trouble at all. A cast piston isn't ACTUALLY a ticking time bomb just waiting for a moment to explode. The real problem comes as a top end begins to get "loose" and the owner/operator continues to run it even with that piston slapping around in there instead of taking the top end off and taking it to a machine shop for a bore job. Eventually all the rocking of the piston can cause the *relatively* weak structure of the cast piston to break where a forged piston *MIGHT* survive that abuse.
With proper care and maintenance a cast piston CAN give a good long service life. That being said, I run forged pistons in pretty much everything I've ever taken apart (even my prairie 400 4x4
) Wiseco in stock bore top ends and a wossner in my BBK.
Got a 72.5mm cast vitos in my BBK with no issues.
Keep the detonation out of the equation and as civic said do proper maintenance and you will be good.But as its been said just pony up the extra 30 if you can go with a wiseco.
Keep the detonation out of the equation and as civic said do proper maintenance and you will be good.But as its been said just pony up the extra 30 if you can go with a wiseco.
WSM makes a cast and an ultralight teflon coated forged piston.
From my reading about them the cast ones are fine but of course they get blamed for alot of guys on the cheap who also can't tune.
The forged ultralights I have heard have issues with being too light. They develop cracks around the boost port windows over time.
From my reading about them the cast ones are fine but of course they get blamed for alot of guys on the cheap who also can't tune.
The forged ultralights I have heard have issues with being too light. They develop cracks around the boost port windows over time.
