TB 178cc Bore Kit, Race Head V2, and Intake Manifold Kit

TB 178cc Big Bore Kit, Race Head V2, and Intake Manifold Kit – This is the final step in power gains as far as cylinder size goes.  Like the 165cc kits, installation of this kit requires engine dis-assembly and case boring.  The engine cases cant safely be bored any bigger and for this 67mm cylinder,  you definitely will want an experienced shop to bore your cases.  You can also add a stroker crank and take it up to 194cc – Massive power!  This kit is for the serious racer and if just looking for more fun on your Z125, we recommend the either the 143cc or 165cc kits. The parts in this kit were developed to work flawlessly with each other to deliver a high level of performance at an affordable price. While we sell each part of this kit separately, running the combination of the big bore kit, race head, and intake kit is where you will see the most power and performance gains for the best value.   These are high quality parts and the increased power will not disappoint. Here’s whats inc