Makita 6401 "big bore" or no

[Mike Ray]

I have two makita 6401's and I really like them one with 20" bar other 24" bar. I bought a big bore kit to have if one needs rebuilt, my question is that somewhere I read that you don't see much difference with the big bore unless you are running longer bar than 24. would like to hear opinions on this.I have no need for a longer than 24" bar.