Author Topic: large journal crank  (Read 305 times)

Offline nimrod650

  • Valued Contributor
  • ****
  • Join Date: Feb 2015
  • Posts: 442
  • Karma: 4
large journal crank
« on: 09.01. 2016 18:46 »
what is  the difference between large and small journal cranks are there any numbers to tell thanks

Online KiwiGF

  • Last had an A10 in 1976, in 2011 it was time for my 2nd one. It was the project from HELL (but I learned a lot....)
  • Wise & Enlightened
  • *
  • Join Date: Feb 2011
  • Posts: 1388
  • Karma: 12
Re: large journal crank
« Reply #1 on: 09.01. 2016 19:42 »
The journal size of the big ends are significantly different (of course!). The small journal crank also has wider big end journals.

I am not sure if part or casting numbers are on the cranks but the flywheels look different as well, being bolted on differently etc.
New Zealand

1956 A10 Golden Flash EA7-168x, CA10 913x, left BSA together for Liverpool, 5th Dec 1955.

1949 B31 rigid “400cc hot rod” (favourite bike)

1949 C11 rigid, but why!!! (cos it was cheap)

1937 B21, missing parts so mission impossible?

1952 Armstrong Siddeley Whitley for rainy days (with wife).

GL1800 Goldwing not sure why, maybe cos it always starts