Honda-SOHC

SOHC.co.uk Forums => Other Bikes => Topic started by: Arch stanton on July 23, 2019, 09:52:21 AM

Title: Cb175 voltage regs?
Post by: Arch stanton on July 23, 2019, 09:52:21 AM: Can anyone explain why. The European market 175 had a voltage regulator.
When the US market bike didn't?
Tia.
Sean
Title: Re: Cb175 voltage regs?
Post by: mike the bike on July 23, 2019, 02:45:39 PM: Maybe because the US version had rge lights on permanently so didn't need a regulator because the alternator is going flat out anyway.
Title: Re: Cb175 voltage regs?
Post by: Arch stanton on July 23, 2019, 06:22:38 PM: That is indeed a possibility.
It's just that both me and a mate have US market CB, s neither of them charge.
But my UK bike charges fine.
Title: Re: Cb175 voltage regs?
Post by: Bryanj on July 23, 2019, 11:34:12 PM: Isnt the reg on those just a zenner dump to earth?
Title: Re: Cb175 voltage regs?
Post by: AshimotoK0 on July 24, 2019, 12:06:05 AM: Quote from: Bryanj on July 23, 2019, 11:34:12 PM
Isnt the reg on those just a zenner dump to earth?
It is the same function as A Zener diode Bryan but a much more precise cut off voltage using a 'crowbar' electronic circuit potted in resin.Nothing to stop fitting the unit from a CB175 or CB250/350 to any single phase alternator old Honda that doesn't have the regulator... like the CB450K0 for example
Title: Re: Cb175 voltage regs?
Post by: Bryanj on July 24, 2019, 04:51:04 AM: Thats what i thought Ash, so if the US ones dont charge it has to be a stator fault or witing connection fault, unless the magnetism on the rotor has done a runner
Title: Re: Cb175 voltage regs?
Post by: AshimotoK0 on July 24, 2019, 08:33:56 AM: Quote from: Bryanj on July 24, 2019, 04:51:04 AM
Thats what i thought Ash, so if the US ones dont charge it has to be a stator fault or witing connection fault, unless the magnetism on the rotor has done a runner

I reckon on a lot of older Honda's (Bomber 450 is a prime example) the loss of magnetism with age is a big factor in lack of charging Bryan