Yes you can bore stock cylinders to 107". The advantage of a kit is shorter down time, but more money. I wouldn't spend the money to go from a 103 to a 107 unless it was a have to case, the bang for the buck will not be there.Can you bore a 103" to 107" or are you best to buy 107" cylinders? it seems to me there are a lot of venders selling 107" cylinders with piston kit. Is there any differences between the kits?
No reason to change injectors, you won't be making that much power. Talk to your head porter about which cam to use and maybe shaving them to bump the ccompression up bit.Ok! keep it at 103"do the heads (port polish and decked),cams,(tw-888 ?) Injectors, clutch spring,and a good tune. Am I missing any thing.(can I upgrade injectors?)
No sour apples here, just a shot of reality. 120/120 from a 107 is going to mean that it's making more power to the right hand side of the graph, which means you're going to have to work it to see that. No big deal, but it's something to be aware of. And while it may be "fun-er", you need to decide if that little bit more fun is worth several thousand dollars. Especially knowing that even with that money spent, you're still going to be slower than most other non-Harley motorcycles.Wow! take it easy! We don't need any sour apples,It's almost Xmass. (DOOF)Is that your Givin name? 120/120 sounds fun to me!