Author Topic: Tiny metric screws for GTR  (Read 199 times)

0 Members and 1 Guest are viewing this topic.

Offline nysz1b

  • Trade Count: (0)
  • Full Bridgestone Member
  • ***
  • Posts: 128
  • What, me worry?
Tiny metric screws for GTR
« on: October 11, 2018, 01:28:39 PM »
I'm looking for a good source for the screws on the points plate for the GTR.  Also need the tiny screws in the handlebar switch that holds the small plate that anchors the wiring to the switch.   Hardware store metric screws, altho seeming to be the right diameter, have a different pitch. Thanks in advance!

Offline BRT-GTR

  • Brian
  • Trade Count: (0)
  • Master Registered Bridgestone Member
  • *****
  • Posts: 765
Re: Tiny metric screws for GTR
« Reply #1 on: October 11, 2018, 02:54:14 PM »
         Bridgestone used Japanese Industrial Standard (JIS) screws which were the Japanese norm prior to the change to ISO screws in 1972, I think. Hardware store screws will be ISO.  You will know the 6 & 8mm screws have the same pitch in both standards, so can be interchanged.

   However, the smaller JIS screws are harder to find. We have a company in the UK who can supply the 5X0.9mm pitch JIS screws, here              https://www.mrmegapack.co.uk/philips-screws-bzp-30-c.asp

  Although he advertises 3 & 4mm JIS screws, I believe this refers to the screw head design, not the thread pitch. Check with him before ordering.

  What you need are :-   Points plate,   4 X 0.75mm pitch JIS screws  (ISO is 0.7mm pitch). You can get away with ISO screws for attaching the points, just, because there are only 3 or 4 threads through the back plate. ISO are not suitable for the longer screws that hold the back plate, condensers or the cover. These could be retapped to ISO as a last resort.

                                   Handle bar switches, 3 x 0.6mm pitch JIS screws (ISO is 0.5mm pitch). I have recut ISO screws to JIS before now using a good quality HSS die. Not best practice, I know, but needs must !!
      You could also try Suzuki or Yamaha dealers to see if they have any old stock screws.

     Hope this helps,     Brian.



« Last Edit: October 11, 2018, 03:37:12 PM by BRT-GTR »
Unspoiled by progress.

Offline nysz1b

  • Trade Count: (0)
  • Full Bridgestone Member
  • ***
  • Posts: 128
  • What, me worry?
Re: Tiny metric screws for GTR
« Reply #2 on: October 16, 2018, 02:44:00 PM »
BRT-GTR: Thanks for the reply and very useful information!

Offline steve

  • Trade Count: (0)
  • Full Bridgestone Member
  • ***
  • Posts: 127
Re: Tiny metric screws for GTR
« Reply #3 on: October 17, 2018, 12:55:06 PM »
You are correct Brian...the 3mm and 4mm screws that Megapack sells are ISO thread (0.5 and 0.7 respectively)  :(

 


Gallery


Views:10
Comments (0)
By: harleywaynecycles

Views:16
Comments (0)
By: harleywaynecycles

Views:10
Comments (0)
By: harleywaynecycles

Views:5
Comments (0)
By: harleywaynecycles

Classifieds

Assorted Bridgestone Parts

Price: $0.00
Date: 10/16/2018 11:09 am
Time Left: 83d 2h 28m
Bridgestone 350 Carburetors (2nd. Set)

Price: $0.00
Date: 10/04/2018 04:52 pm
Time Left: 71d 8h 11m
1966 DT 175

Price: $1900.00
Date: 09/16/2018 07:14 am
Time Left: 52d 22h 32m
Bridgestone Jacket XL

Price: $0.00
Date: 09/08/2018 01:25 pm
Time Left: 45d 4h 43m

Recent Downloads added

11/01/1967 Factory Service Letter, RH shift/LH Brake conversion

Rating: (None)
Filesize: 92.56KB
Date: August 03, 2018, 02:49:08 AM
11/01/1967 Factory Service Letter, RH shift/LH Brake conversion

Rating: (None)
Filesize: 142.24KB
Date: August 03, 2018, 02:44:36 AM
350 GTR Wiring Diagram
Rating: *****
Filesize: 8604.23KB
Date: July 29, 2018, 12:29:25 PM
Bridgestone Motorcycles

Rating: (None)
Filesize: 3561.91KB
Date: June 05, 2018, 04:42:13 PM

Powered by EzPortal