I am looking into getting a big bore kit for the z. my question is which big bore kit is better between the yoshi 450 kit or the ct racing 453 kit and possibly the thumper 470 kit. which makes the most hp and i think the yoshi is a combination of bore and stroke so is that better than just a big bore. also which will rev out quicker. i have the ct racing pipe and that gave a good boost in power. If theres any other big bore kits out that are good thanks, oh and some prices of these kits would be nice because i cant find prices of any of them.

 

If you want it to "rev out quicker", stay away from a stroker.I have a 400ex stroker. The revs are slower now because the crank shaft travels are longer distance. You do gain alot of torque, though.