Cosworth 57mm Pistons HAVE ARRIVED

normanmike67 · Post by **normanmike67** » Tue Apr 21, 2015 10:00 pm

Until I can find rings, pistons are on hold. Yamaha 57.0mm (+1.0mm O/S of FZR400) are out of production

Post by **skinnydog0_0** » Tue Apr 21, 2015 11:25 pm

Not sure if these are any good but they are honda 57mm pistons so a possible??

http://www.classicracereplicas.com/prod ... rod_anchor

Post by **lukemillar** » Tue Apr 21, 2015 11:27 pm

Those are 2 stroke pistons!

Post by **skinnydog0_0** » Tue Apr 21, 2015 11:28 pm

Yer but could the rings be used?

normanmike67 · Post by **normanmike67** » Wed Apr 22, 2015 2:31 am

2 stroke rings are not compatible

Post by **skinnydog0_0** » Wed Apr 22, 2015 7:53 am

Yer silly idea really, but you never know

How about these guys?

http://www.ringleader.net/

crazyman · Post by **crazyman** » Thu Apr 23, 2015 8:20 pm

zxr400 start at 57mm , will messure as i have some fzr rings here as well

Yakama · Post by **Yakama** » Wed Jul 22, 2015 8:03 am

g-force performance wrote:I currently have a request in to both Cosworth, and my new piston vendor for quotation. My new vendor will have a longer delivery time because they want to build true forging tooling. This will make the pistons even stronger, and less expensive. The new vendor has made me a few sample sets athat are absolutely outstanding Quality - as they should be. They are the same supplier that makes many OEM pistons that we are familar with, as well as the piston for some well established F-1 Engine builders.

The bigger delay is, I just found our that Yamaha has discontinued the rings I was using from the FZR400. This is really bad news as it means that I don't have a ring for the pistons at this time. I have asked the piston companies of they can make the rings as well. Also, I have something on the works for an alternate solution that I should know for sure about shortly.

So, hang tight. If the new vendor comes through, I can get these piston kits significantly down in price. We shall see.

Mike Norman

Hi Mike

Any progress with the Pistons?

panteleimon · Post by **panteleimon** » Mon Nov 23, 2015 9:09 am

Hi Mike,

Like Yakama posted, any progress on sourcing the rings & pistons?
Cheers.

Post by **Variablevalves suck** » Mon Nov 30, 2015 6:53 pm

So from what I understand its across the board with pistons,
i.e all manufacturers are out.
So question is does anyone know what the zxr guys use as its the most commonly races 400 so they got to be using pistons.
I know they were bigger bore than the Honda but could be used with a little work.

Cosworth 57mm Pistons HAVE ARRIVED

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Re: Cosworth 57mm Pistons HAVE ARRIVED

Re: Cosworth 57mm Pistons HAVE ARRIVED

Re: Cosworth 57mm Pistons HAVE ARRIVED

Re: Cosworth 57mm Pistons HAVE ARRIVED

Re: Cosworth 57mm Pistons HAVE ARRIVED

Re: Cosworth 57mm Pistons HAVE ARRIVED