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<span>We've had quite a few questions on the power difference between our case and a stock Zenoah case
The following port work has been done:</p> <p><br />1
The 47cc version requires a +1mm stroker crank
Turtle Racing mounting kit
This engine will come with a CY fancover for a direct fitment into an HPI Baja
6204 - Race Ported 2 Bolt 30.5 Upgrade Kit Crankshaft:Unstuffed 2mm Stroker <span>We've had quite a fewThis is a brand new race ported 30. 5cc upgrade kit. This kit comes with everything need to turn your motor into a beast. To start we machine the cylinder for the 2mm stroker and for a proper squish clearance with out stacking gaskets. This allows the motor to rev higher and still have a massive amount of torque. All of our port work is done by hand except for machining the cylinder. Kit includes a complete top end (cylinder, piston, ring, piston
