Amal Pre-Monobloc Body Groups

Type

Throat Size

Area, In.²

Notes

274

    21/32”

    .65625”

16.7mm

  .338”

Same body casting. Tuning parts interchange (except jet block).

Most internal parts interchange (except needle).

    23/32”

    .71875"

18.3mm

  .406"

    25/32”

    .78125"

19.8mm

  .479"

275

    13/16”

    .8125”

20.6mm

  .518”

Same body casting. Tuning parts interchange (except jet block).

    7/8”

    .875”

22.2mm

  .601”

276

    15/16”

    .9375”

23.8mm

  .690”

Same body casting. Tuning parts interchange (except jet block).

  1”

  1”

25.4mm

  .785”

  1-1/16”

  1.0625”

27.0mm

  .887”

289

  1-3/32”

  1.09375”

27.8mm

  .940”

Same body casting. Tuning parts interchange (except jet block).

Most internal parts interchange.

  1-1/8”

  1.125”

28.6mm

  .994”

  1-5/32”

  1.15625”

29.4mm

  1.050”

  1-3/16”

  1.1875”

30.2mm

  1.108”

Click here to download the factory Amal “Standard” Tuning Tips and parts list as a large PDF File