« previous next »
Pages: [1]

Author Topic: Crankshafts  (Read 6655 times)

0 Members and 1 Guest are viewing this topic.

Justgotit

  • Newbie
  • *
  • Posts: 5
Crankshafts
« on: November 16, 2012, 07:48:11 AM »
  Are all crankshafts in Invaders the same? 340, 440, 2plug, 4 plug, different years? I have a 4 plug crank from a 4/6 that is in real good shape that i would like to use in a 2 plug motor.
Logged

jimvw57

  • Hero Member
  • *****
  • Posts: 624
Re: Crankshafts
« Reply #1 on: November 16, 2012, 09:53:42 PM »
No problem. The 1978-1981  motors are the same, the mono-block motors were different but I believe they used the same cranks 340 and 440 had the same bottom end.

 A lot of 340 motors were changed to 440 by repacing the cylinders, pistons, carbs, etc.
Logged

Justgotit

  • Newbie
  • *
  • Posts: 5
Re: Crankshafts
« Reply #2 on: November 21, 2012, 06:20:36 AM »
Thanks Jim.
Logged

Invader440

  • Jr. Member
  • **
  • Posts: 65
  • Up Norte Dere in Fosston, Mn
    • Curt's Snowmobiling Page
Re: Crankshafts
« Reply #3 on: November 21, 2012, 09:41:56 AM »
Quote from: jimvw57 on November 16, 2012, 09:53:42 PM
No problem. The 1978-1981  motors are the same, the mono-block motors were different but I believe they used the same cranks 340 and 440 had the same bottom end.

 A lot of 340 motors were changed to 440 by repacing the cylinders, pistons, carbs, etc.

Not quite true.  there is a difference in the position of the thrust washers between the 78 and 79 and later cranks.
Logged
Pages: [1]
« previous next »