Alternator Style Crankcase Assembly with 3-1/2in. Bore – Black. Fits Big Twin 1984-1991.
Features & Benefits:-
* Wrinkle Black.
* Perfect for stock replacement & high performance applications
* These crankcases offer some unique features.
* Besides being machined for a crank position sensor, they are also compatible with stock flywheel assemblies, primary covers, gear covers and are clearance for 38 amp alternator stators.
* Relocated cam chest oil pick-up increases gear case scavenging & virtually eliminates oil carry-over at sustained high speeds.
* Machined to accept the stock oil filter assembly used on Big Twins 19841991.
* A ported breather passage way & a machined breather window allows the air/oil mist to flow from the flywheel cavity to the cam chest of the engine with the least possible restriction.
* Crankcase venting can be achieved via two crankcase breathers, the cylinder heads, or both.
* We recommend using both crankcase breathers in engines larger than 95ci.
* Clearanced for strokes as long as 5in.
* Compatible with stock 1984-1999 flywheel assemblies, primary covers, gear covers, and clearanced for 38 amp alternator stators, making them perfect for stock replacement or high performance applications.
* Machined for installation of a crank position sensor.
* This allows the cases to be used in stock EFI applications & also allows easy installation of S&S IST Ignition & VFI Fuel Injection.
* A plug kit is included for applications that do not use a crank position