Author Topic: Cylinder Bore  (Read 433 times)

Offline Drew Back

  • A's Best Friend
  • ***
  • Join Date: Jun 2014
  • Posts: 172
  • Karma: 0
Cylinder Bore
« on: 14.12. 2016 01:00 »
Ok so I got another A7 long stroke cylinder I know stock is supposed to be 62mm well it measures out to 63.4 mm what size pistons or how much over would that be..I have a .40 piston and it is to big What size should I shoot for? The bores look pretty good now also.

Online bikerjohndavies

  • John Davies, Bath, UK
  • A's Best Friend
  • ***
  • Join Date: Jun 2010
  • Posts: 237
  • Karma: 3
  • 1953 BSA A10 Super Flash Project
Re: Cylinder Bore
« Reply #1 on: 14.12. 2016 09:00 »
Hi Drew, 63.4mm would make it +.060 bore so not sure what you mean when you say a +.040 is to big? How accurate did you measure the bore? For info .5mm is 20 thou or .020
1937 Panther M100 Rigid, 1946 Ariel Square 4, 1952 Norton Model 7, 1953 BSA A10SF (WIP), 1954 Ariel VH, 1961 Triumph T120R

Offline Drew Back

  • A's Best Friend
  • ***
  • Join Date: Jun 2014
  • Posts: 172
  • Karma: 0
Re: Cylinder Bore
« Reply #2 on: 14.12. 2016 15:19 »
Thank you for the imfo I shal take it to the pros to get accurate measurements ..