Biggest Yamaha Flat-Top?

[MTRHEAD]

What is the biggest Yamaha Flat Top piston (20mm pin) "readily" available?

"Cut for a yamaha - like a lamey flattop piston - and ring position for a Yamaha" Not a Kawasaki put into a Yamaha.

Over the years I've owned up to 86.5mm Dominators (R&D) and I was wondering what is available bigger. I know Wiseco custom MFG's bigger but I dont know the customers.

Thanks

 

[SUPERTUNE]

From the BUN racing catalog, they list some custom 90mm flattops for their billet cylinder but haven't seen them to know anything about them...

 

[waterfreak]

From the BUN racing catalog, they list some custom 90mm flattops for their billet cylinder but haven't seen them to know anything about them...

I saw them at WF in their booth. They were all in a wiseco box .
$240 each!!!

 

[MTRHEAD]

Yes I'm aware of the Bun pistons - both Yamaha and Kawasaki
89., 89.5 and 90mm Just bigger Wiseco's that we could order if we had a group buy. I'd rather save the hassle and buy locally.

I know my 90mm GPR custom pistons only cost me $175 each from the other board and they were local, coated, and completely perfect.