Big Twin Cases PDF Print E-mail

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STD High Performance Engine Case Applications

STD offers a full range of Big Twin Engine Cases for Panheads, Shoveheads and Evolution style motors from 1941 to present in Alternator, Alternator/Generator, and Generator applications.

All Evolution style and most older Panhead and Shovelhead applications are upgraded with the latest Timken roller bearing in the LH case side and a needle cam bearing rather than the stock bushing. STD cases are available unfinished, bare, or complete and ready to run with all studs and bearings as needed.

Complete Alternator Cases

For Evolution, Shovelhead & Panhead style motors. 355T6 "A" Prime Alloy - Line Lapped, with Studs, Bearings and Bolt Kit. Available in Standard through 4.50 in. bores.

  • Part No. 1976 (Standard through 3 13/16" Bore)
  • Part No. 1976-4 (4.0" Bore)
  • Part No. 1976-4 1/4 (4.25" Bore)
  • Part No. 1976-4 3/8 (4.375" Bore)
  • Part No. 1976-4 1/2 (4.50" Bore)

Complete Alternator/Generator Cases

For Evolution, Shovelhead & Panhead style motors. 355T6 "A" Prime Alloy - Line Lapped, with Studs, Bearings, and Bolt Kit. Available in Standard through 4.50 in. bores.

  • Part No. 1983 (Standard through 3 13/16" Bore)
  • Part No. 1983-4 (4" Bore)

Also availalbe in 4.25, 4.375, 4.50 in. bores. Call for more information.

Complete Generator Cases

For Evolution, Shovelhead & Panhead style motors. 1969-1998. 355T6 "A" Prime Alloy- Line Lapped, with Studs, Bearings and Bolt Kit.

  • Part No. 1969 (Standard through 3 13/16" Bore)
  • Part No. 1969-4 (4" Bore)

NEW! 1941-1969 Replica Style Generator Cases

  • Part No. 1969-41-C 1941-47 Big Twins
  • Part No. 1969-48-C 1948-52 Big Twins
  • Part No. 1969-53-C 1953-54 Big Twins
  • Part No. 1969-55-C 1955-57 Big Twins
  • Part No. 1969-58-C 1958-62 Big Twins
  • Part No. 1969-63-C 1963-64 Big Twins
  • Part No. 1969-65-C 1965 Big Twins
  • Part No. 1969-66-C 1966-67 Big Twins
  • Part No. 1969-68-C 1968-69 Big Twins

Big Bore Engine Cases

If you're looking to build the ultimate big bore motor, STD is again the best place to start! Our new 4.25" Big Bore Engine case Assembly continues our standard for the world's strongest engine cases. Whether your're building the world's ultime street engine or a nitro burning drag bike, STD offers the high strength rated case on the market. Cast from aerospace quality 355 T6 "A" prime alloy with a tensile strength rating of 45,880 psi, the highest rating of any aftermarket cases. Special options include even larger bore sizes up to 5.0" diameter, as well as raised deck heights up to 2.0' over stock. Call for details and pricing.

STD also builds complete Engines and Drivetrains, and using this new Big Bore case we can build you the ultimate engine displacing anywhere from 106.6 to 150 cubic inches, ready to bolt into your chassis and run, with all accessories including full electrics and a Mikuni HSR45 carburetor.

 


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