How to install a bigger crankshaft

[James2132]

Hi I have a taotao 150cc scooter and im trying to install a bigger crankshaft for more power but there's hardly any info on how to install these bigger high proformance crankshafts. What's the biggest u think I should go? I saw one in ebay that was +8.2mm! With the 63mm cylinder I'm gonna install I estimate I will have about 232cc or more. I notice all of the crankshafts have a thing call a woodruff key space how do i install these?? Thanks.