FZR600 Pistons in a GS550 4-valve (83 to 86) ????

[Anonymous]

I recently talked to a guy Who raced a GSX550 (GS550ES) He said he tried big bore kit in his bike but it was too big a bore and the motor ran too hot. He said his best mod was the use of FZR600 pistons (.5 mm over stock GSX550) yield over 13 to 1 compression with shorter rods in the motor. He mentioned his set up had the crank destroked by 1mm and the rods were -5mm (shorter) from the stock pcs. All this info is according to the racer I talked to. He had a lot of other mods to his motor but claimed 85 horses on the dyno. 8O Does any1 have a clue on this or input, He did not give a source on the rods or if the destroke on the crank was a necessity. Hopefuly some1 can help me make sense of this before I find a cheap 750 Katana motor to put in this bike. :twisted: Thanks to all you guys. GS RESOURCES RULES

[Dink]

Sounds "doable" you would need to find a Really good engine builder near you and speak to him. I have no idea on which rods would be suitable but a good engine builder would.
Dink