Recent Posts

Pages: 1 2 [3] 4 5 6 7 8 ... 10
General Discussion / Re: Members Map
« Last post by mike1948 on August 22, 2023, 03:14:33 AM »
Moonpup, my question as well, though 3yrs later.  What went wrong?  I think this would be very interesting to have.  I might have originated from Rushville IN, but now want to show as Brisbane, Aus.
Cheers, Mike.
175 & 200 Talk / Re: Spark plug socket size for 175
« Last post by Joe on August 19, 2023, 08:42:35 PM »
Thanks! Appreciate the information!
175 & 200 Talk / Re: Spark plug socket size for 175
« Last post by czmike on August 19, 2023, 08:34:15 PM »

Hi Joe,

13/16" AF (Across the Flats) is the size socket you need to remove or refit standard spark plugs in your HS175.
This is a very common spark plug hex size used in older engines. Use a proper Spark Plug Socket which has a a rubber insert inside to stop you breaking the porcelain insulator of the plugs which is hard, brittle & easily cracked.

Thanks to the long history of engine and spark plug development the sizes & threads used for plugs are confusing.
The thread of the spark plugs is Metric (14mm x 1.25) as is the terminal for the HT lead (M4 = 4mm x 0.7) but the hex for the socket is Imperial (13/16").

Best Regards,
Mike Munday (also HS175 owner),
175 & 200 Talk / Spark plug socket size for 175
« Last post by Joe on August 19, 2023, 07:55:10 PM »
Title says it all . What size socket for a HS 175 spark plug. I did a search and no result…thanks !
350 Talk / Re: incorrect wiring
« Last post by BRT-GTR on August 19, 2023, 09:53:05 AM »
        Sounds like a plan, it relatively simple.
      I disconnected the white wire from the rectifier, then separated the bullet connector on the brown wire coming up from the alternator.  Then made up a short connecting wire from the alternator brown to the white terminal on the rectifier.
      I taped together (but not electricaly connected) the now redundant white and brown wires running back from the ignition switch and tucked then safely out of the way.
      Apologies if the above is obvious to you, it may help others.
350 Talk / Re: incorrect wiring
« Last post by mrjones on August 19, 2023, 06:00:31 AM »
 Thanks for the information Brian , yes it ran ok for a while two years ago before a non electrical fault stopped play!, im going to try the easy option of connecting the white and brown wires, that sounds like a good idea to me!
350 Talk / Re: incorrect wiring
« Last post by BRT-GTR on August 17, 2023, 11:01:00 AM »
Hi Marcus
       Sounds like your GTR has been fitted with a 5 wire ignition switch from the 175/200 models (these are more readily available and cheaper).
         As far as I can tell, the 350 has an extra circuit, which swiches in the 3rd phase of the alternator when the lights are in use for extra power. This uses the brown wire from the alternator which the switch connects to the white wire to the rectifier.
          Your horn should be connected to the battery using blue wire as shown in the GTR wiring diagram. It needs battery power to work properly. There may be a spare blue socket on the switched live coming from your switch, if not splice it in.
    Unfortunately the wiring diagram for the 175 in the manual on this site is not colour coded so it is difficult to compare the 175/350 circuits.
         Try this - connect horn as above. Connect the brown and white wires together (near the rectifier where they meet). This effectively bypasses the ignition switch and gives a useful battery charge boost.     
          Alternatively, buy a 6wire GTR switch.  Richard shows 1 in stock but Kerry Pagenkopf (facebook site) may have also have a new or good used one. I bought one from him recently.

Edit.      From a colour coded 175 wiring digram that Mike Dunham sent me (Thanks mike), the 175 switch shown does have a brown wire and shows 7 connections from the switch. So I,m not sure now what switch you have. Mikes wiring diagram also varies from the one shown in the on-site manual and may be a later 175 wiring update which does include brown/white wires for switching in the 3rd alternator phase.  However, I believe the suggestions I made above should still work if you have previously run the bike with the fitted 5wire switch.
350 Talk / incorrect wiring
« Last post by mrjones on August 17, 2023, 07:15:45 AM »
 hello ,i havnt run my bike (gtr) for two years so i got a new battery and thought id check all the electrics out before starting it.the horn didnt work so i checked the earth (from handlebar switch) which was fine and the power, which comes from the brown dynamo wire  on my bike! ive checked on the wiring diagram and the brown should go to the ignition switch then to the horn as a blue.

 i can use a blue for the horn but ive also found my ignition switch only has 5 wires and is missing the brown completely, my question is why would someone do this? or was there a 5 wire ign switch model? ive read the brown supplied the power to the lights wouldnt this be too much for just the horn? thanks Marcus
Members: Introduce yourself / Re: New old member
« Last post by Joe on August 15, 2023, 03:46:20 PM »
Yes, found them. Thanks!
Members: Introduce yourself / Re: New old member
« Last post by OldSwartout on August 15, 2023, 08:39:24 AM »
This forum has been around for so long, nearly every question has been asked and answered, so search is your quickest way to get answers, but of course, you can always ask when that doesn't provide a good answer.   I assume you found the manuals in the downloads section.
Pages: 1 2 [3] 4 5 6 7 8 ... 10


Comments (0)
By: rwgibbon

Comments (0)
By: Perry L Anderson

Comments (0)
By: Perry L Anderson

Comments (0)
By: Perry L Anderson


1967 bridgestones speedometer cable needed
Date: 08/29/2023 03:49 am
Time Left:
Bridgestone BS 7 / surfrider
Date: 08/20/2023 06:58 pm
Time Left:
Bridgestone motorcycle parts wanted list
Date: 03/21/2023 03:45 am
Time Left:
Bridgestone BS 7 / surfrider
Date: 02/28/2023 05:07 pm
Time Left:

Recent Downloads added

Chibi, Chibi Deluxe, Tora Service Manual
Rating: (None)
Filesize: 20383.27KB
Date: May 01, 2023, 08:35:39 PM
Rating: (None)
Filesize: 14301.44KB
Date: May 01, 2023, 08:25:53 PM
BS200 Mk II RS & MK II SS Exclusive Parts
Rating: (None)
Filesize: 358.29KB
Date: March 07, 2021, 07:30:10 PM
1970 sales brochure
Rating: *****
Filesize: 6753.33KB
Date: July 16, 2020, 10:01:18 PM

Powered by EzPortal