Pro Port Shaping In a Stock XS650 Cylinder Head
Flow Bench Designed "D" Port Shaping In a Stock XS650 Cylinder Head
Glass beaded XS650 cylinder head
New intake manifolds are ported to match the intake ports and set up for 36mm or 38mm Mikuni VM carbs. New high performance valve springs are installed with light weight retainers for use with the special camshaft grind we use shown above on the stock 447 billet camshaft core.
Through the manifold intake port view of the exhaust valve and combustion chamber.
Intake valve pocket areas are very rough cut by the factory machining and is removed in the above image.
Pro "D" port high velocity shaping at the short side radius adds port area at the short side only.
Additional manometers by my Superflow 110 flowbench are for velocity measurements.
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