It's been done but not reccommended if you don't want to work on it every 3 months. 1363 is about as big as most guys go for a turbo and is what I'm running.
I believe Johnny Cheese did a large big bore and turbo setup.
Anything larger than 1397cc will compromise the available head gasket sealing area. . . that, and the fact that you can make over 600 RWHP with the stock bore and stock cams makes it not the preferred thing to do. If you have to, try to go no more than 1363cc . . .
Met a guy once at the track. He said he had a 1720 stroker and I know the bike had a turbo. He wouldn't talk HP. Oh and he had a Georgia bike plate on it.
Listen to these guys they know what they're talking about.
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