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To the OP: sorry also for going off topic. I have heads ported by JD Hord but as they came in a motor with Wiseco pistons and some other mods I can't give a back-to-back comparison. Yet to dyno the bike but will do so after NY. I left the porting entirely to JD, he ports the heads depending on what cams are being used - Mori Stage 1's in my case. If you'd like to know just what gains can be had with head porting alone then ask him, I'm sure has checked it out.

JD Hord has a wealth of knowledge on the twins, he has made a career out of them.
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