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PART 51-1957

Straight Leg Rigid Frame

by V-Twin
$1,437.68
V-Twin list $1,198.07 ยท our price includes online ordering & support
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You will also need another part

  • Required When using a chain drive with a 230 tire, the use of #17-0859, a 1" offset plate and a #19-0105 sprocket is required.
  • Required When using a belt or chain drive with a 200 tire, the use of #17-0860, a 3/4" offset plate and a #19-0104 sprocket is required.
  • Required When using a Shovelhead, Evolution, or Twin Cam engine, it is required to use a #42-0617 tin inner primary.
  • When using with a TC-88 engine order #51-0625 rear frame mount adapter plate
  • Use #31-0475 Front Engine Mount Spacer to accept 1936-1947 Knucklehead or Flathead engines in 1948-up frames.
  • When using the #42-0617 tin inner primary, the use of #19-0570 is needed if using a #17-0859 transmission plate 1" offset and a #19-0105 sprocket.
  • When using the #42-0617 tin inner primary, the use of #19-0569 is needed if using a #17-0860 transmission plate 3/4" offset and a #19-0104 sprocket.
  • Suggested to use with #44-1942 axle.
  • Accepts 140-200 rear tires.
Big Twin 1984 & UpClassic Pre-1984
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Description

Retro rigid frame straight leg original style is updated to accept flat side gas/oil tanks. Original forged parts include: neck, side car mounts and rear axle area. For all Big Twin engines with 4, 5 or 6 speed transmission. Shovelhead, Evolution and TC-88 engines require a tin inner primary. Accepts Knuckle or Flathead engine with mount spacer. Use with disc brake and 87-UP style rear caliper, 1986-1989 Softail gas tank, rear tire 230 w/ chain or 200 w/ belt or chain drive and a 3/4" rigid rear axle. Will not accept a stock seat post. Neck is 2" extended over stock, with 30ยฐ rake. **NOTE: Seat post and cross shaft bushings may require further reaming for proper fit. The frame is taller in the engine compartment to house the Evolution and TC-88 thru 110 motors. Rigid mount 5 and 6 speed transmission with the aluminum inner and outer primarys, check height of transmission plate for correct primary alignment. In some instances it may be necessary to ream or file holes slightly in order to assemble parts onto the frame. Assembled with detailed casting at all poimts, tool box mount included. Casting are not "Hallmark" type. Raw steel transmission mount plate and axle noy included.

Specifications

V-Twin number
51-1957
Manufacturer
V-Twin
Sold as
1 - EA
Origin
Imported

Fits these motorcycles (2)

FX1971-1999
FL1948-1965