Curious how much the 300cc bore costs, parts and labor. A rough estimate? I might get it done for fun.

 

I did a little shopping around, but not a huge amount, so you might be able to find a better price than I did. RonAyers.com was about the best price I could find for parts at around $470 if you don't count places like e-bay. If you get lucky, you can get a 300 kit off e-bay and save as much as $100 to $150 or so based on the prices I was seeing. I just seemed to be unlucky when these came up on e-bay and missed the auctions. I installed mine DIY so I didn't have labor costs. I think dealer installation would run around $200 to $300 depending on how much your dealer charges. Figure around 3 or 4 hours of labor.