I am going to purchase big bore kit with street port heads for my TC88 in the next couple weeks. Want to stay in 9.7 - 9.8 compression range with the 204 cams already in bike. One kit I am looking at comes with 9.7 pistons, the other 9.5 and the heads are decked to give 9.7. Does decking the heads give any other benefit to engine running more efficiently, or is it just done to bump compression, and the 9.7 CR on both kits will give same performance?

 

Sorry guys - had a problem with my phone and this there'd got posted twice.