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Twin Cam  Stage2
Big Bore

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

More c.i. is more power  and pair!

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

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.  

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

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

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

(including assembly and adjustment and dyno proof)

Carburettor models: The costs are from 2150 euros.

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

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.  

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.  ​

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

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

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