1mm oversized pistons, crank req.

[buzzawak]

That's the 660 conversion.

????
560 coversion ?
You use the barrels* pistons head + cams* from a 600 and effectively create a short stroke 560cc engine. The 600 has a longer stroke so you'd have to change the crank to get the extra cc's ... which would be a longer job and you'd have to renew the crank shells making it not worthwhile, (you'd just a 600 motor instead).

* maybe - check out FZRFiles webpage for the how to guide

How is the engine displacement worked out ?
The 400 has a 40.5mm stroke
The 600 has a 59.0mm bore

that gives you only 443cc

[Evilchicken0]

http://www.fzrarchives.com/fzr400/560.html" onclick="window.open(this.href);return false;

Never said I was acurate