this could not possibly be more unrewarding. I mean that's a lotta effort for minor gains. You can get the bigger horizontal honda engines, or just work on tuning up yours.
doesn't the c110 also rock a better valved heads too? but no I don't think there's really any good justification for overboring a cub. I dunno, they're pretty great for what they are. And pretty much anyone who needs more just goes for the oversized clones.
there's a lotta cool performance stuff for the trail's like the Ct70, but you'd have to swap motors and go manual shift. I dunno, maybe i'm just being boring but it really doesn't seem worth it