Stage II is Stage I, Dyno tuning in conjunction with Big Bore pistons.

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More c.i. is more power  and pair!

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Your own cylinders are bored and honed to a 3 7/8" bore

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The 1999-2006 Twin Cam models go from 88 ci to 95 ci  and also the compression goes up which means a better combustion and more  power  ignored.  

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The 2007-2017 models go from 96 ci to 103 ci  

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You get a stick, a bench adjustment, and bigger pistons. Including mounting and  the gaskets.  

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Injection models: The costs are from 2750 euros including the Diag4bike stick.

(including assembly and adjustment and dyno proof)

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Carburettor models: The costs are from 2150 euros.

(Includes mounting and adjustment and dyno proof.) This includes adjustable ignition.  

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If you prefer S&S cylinders and pistons, that is also possible for an additional cost. For the 1999-2006 models up to 100 ci and the 2007 to 2017 110 ci.  

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Easy to combine with a camshaft, etc. For Twin Cam models it is advisable to take the easy start camshafts. Read here for the explanation.  ​

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Various additional changes are possible, a better oil pump or cam support plate, other Tappets, etc. can always be discussed.

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Of course it is also possible with a Thundermax computer instead of Diag4bike, for 800 euros more.

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