Crankcases for Harley-Davidson® Motorcycles with Evolution® Engines (1984 – 1991)

These Harley-Davidson® Evolution® Big Twin motor crankcase castings are produced in the permanent mold process using A356-T6 aircraft aluminum alloy. They are CNC machined to precise tolerances.

Technical Specs
All crankcases are now in our upgraded version and come with bearings, races, and studs installed. Cases are line lapped to standard size. All crankcases come with a Manufacturer's Statement of Origin. Non-upgraded cases are available by special order only.

D1022 Case Standard Bore
Comes with bearings, races and studs installed. Relieved for late model mid shift. Requires 1981–1991 oil pump.

D1026 Case Big Bore
Same as D1022, except for a big bore 3.625" spigot.

D1030 Case Big Bore
Same as D1026, except for a big bore 3.8125" spigot.

NOTE
Cases shown with optional "extreme high performance" cylinder studs (must be purchased separately). All cases are assembled with standard high performance studs.

Links (PDF Format)

Download Installation Instructions

Delkron Crankcases for Harley-Davidson® Motorcycles with Evolution® Engines (1984 – 1991)

ITEM #	DESCRIPTION	PRICE	QTY
D1022	Case Upgrade/Standard Bore	$790.44
D1026	Case Case Upgrade/Big Bore	$790.44
D1030	Case Upgrade/3.8125	$790.44



Big Bore Crankcases	Gear Covers	Oil Pump Assemblies with Baisley Gears

©2009 Delkron, Inc. | All rights reserved. | EVOLUTION, EVO, DYNA WIDE GLIDE, SPORTSTER, SOFTAIL, BUELL, FXST, FLH, TWIN CAM 88 and Hogs are registered trademarks of Harley-Davidson Motorcycle Co. Delkron, Inc. is not affiliated with Harley-Davidson Motorcycle Co. in any manner. Harley-Davidson Motorcycle Co. does not sponsor or endorse any of Delkron's products or services.

All Delkron products are proudly made in the U.S.A.

Delkron Manufacturing | 560 Solon Road | Bedford, Ohio 44146 | Site Map