Rotor replacement

[Cidcammi]

Hello all,

New to the forum. I just got my first bike, 1982 GS400E. The bike seemed totally fine at first and was in really good condition, fully rebuilt, all original parts. However, I recently come across a charging issue with the electrical system that I’m still looking into. I have been doing a lot of tests with the multimeter and I am fairly certain that the rectifier/regulator is fine and at first I thought the stator could be in bad shape, but most of the readings are good. The only thing is that the voltage is a lot lower than it should be coming from there. This led me to believe that it could be the rotor that is causing the issue or bad connections/wires. Me and buddy are hoping to get a better look/diagnosis this weekend but I’ve been looking online and I’m having trouble finding a replacement source for the rotor. Some of the prices I’ve seen for a replacement of the same part number have been as high as $600 and I’m wondering if anyone know where I could find a suitable alternative or cheaper solution. Thanks for any advice

 

[Syd]

Hi and Welcome to the forum - where are you from?

With reference to the "the rotor", do you mean the charging stator?

Upload some pics when time permits.

 

[Cidcammi]

Canada. Yes and no. I’ve seen some different terminology; rotor assembly, generator etc. in the attached diagram it’s labeled as #3.

Do you mean pictures of my bike or something else?

 

[Nessism]

Rotors almost never fail. The only times I've heard about them failing it was because the magnets came loose.

First step to fixing a GS charging system is getting an SH775 R/R. Don't buy a fake, make sure SH775 is printed on the top fin. When it comes in, wire it like this.

In the mean time, check the stator for output across each pair of legs. The service manual details out this check. If you get less than 70 VAC, your stator is likely bad.

SH775 Install by nessism, on Flickr

 

[Cidcammi]

I think you meant well with your comment but I asked specifically that I was looking for a solution for sourcing the rotor. I am aware that the R/Rs are sub optimal and that it still could be the stator which is why we are doing a more thorough diagnostic this weekend. I’ve already done all the voltage testing with the multimeter as I explained. I’m looking for rotor replacement sources so that I am prepared after the problem is confirmed

 

[Nessism]

Suzuki GSX400E 1982 (Z) (E02 E04 E16 E17 E22 E24 E26) GENERATOR - buy original GENERATOR spares online

✓ access the GENERATOR schematic ✓ find Suzuki GENERATOR spares easily ✓ OEM parts online available

www.cmsnl.com

ROTOR ASSEMBLY

• Part number:3140233400
• Supersession:i3140245030
• Fits to: Suzuki

Searching 31402-5030 shows it fits the following models. You can search ebay for a replacement. I'm not sure if any aftermarket replacement parts are available.

SUZUKI 1977 GS400X GENERATOR​

suzuki gs400x — 1977

SUZUKI 1977 GS750N GENERATOR​

suzuki gs750n — 1977

SUZUKI 1978 GS400X GENERATOR​

suzuki gs400x — 1978

SUZUKI 1978 GS550E GENERATOR​

suzuki gs550e — 1978

SUZUKI 1979 GS425E GENERATOR​

suzuki gs425e — 1979

SUZUKI 1979 GS425L GENERATOR​

suzuki gs425l — 1979

SUZUKI 1979 GS550E GENERATOR​

suzuki gs550e — 1979

SUZUKI 1979 GS550L GENERATOR​

suzuki gs550l — 1979

SUZUKI 1979 GS750B GENERATOR​

suzuki gs750b — 1979

SUZUKI 1979 GS750C GENERATOR​

suzuki gs750c — 1979

SUZUKI 1979 GS750EC GENERATOR​

suzuki gs750ec — 1979

SUZUKI 1979 GS750EN GENERATOR​

suzuki gs750en — 1979

SUZUKI 1979 GS750N GENERATOR​

suzuki gs750n — 1979

SUZUKI 1980 GS250T GENERATOR​

suzuki gs250t — 1980

SUZUKI 1980 GS450EX GENERATOR​

suzuki gs450ex — 1980

SUZUKI 1980 GS450EZ GENERATOR​

suzuki gs450ez — 1980

SUZUKI 1980 GS450L GENERATOR​

suzuki gs450l — 1980

SUZUKI 1980 GS450ST GENERATOR​

suzuki gs450st — 1980

SUZUKI 1980 GS450SX GENERATOR​

suzuki gs450sx — 1980

SUZUKI 1980 GS550L GENERATOR​

suzuki gs550l — 1980

SUZUKI 1981 COMMUTER GS450T GENERATOR​

suzuki commuter gs450t — 1981

SUZUKI 1981 COMMUTER GS450TX GENERATOR​

suzuki commuter gs450tx — 1981

SUZUKI 1981 CRUISER GS450L GENERATOR​

suzuki cruiser gs450l — 1981

SUZUKI 1981 GS250T GENERATOR​

suzuki gs250t — 1981

SUZUKI 1981 GS450ET GENERATOR​

suzuki gs450et — 1981

SUZUKI 1981 GS450EX GENERATOR​

suzuki gs450ex — 1981

SUZUKI 1981 GS450EZ GENERATOR​

suzuki gs450ez — 1981

SUZUKI 1981 GS450ST GENERATOR​

suzuki gs450st — 1981

SUZUKI 1981 GS450SX GENERATOR​

suzuki gs450sx — 1981

SUZUKI 1981 GS550T GENERATOR​

suzuki gs550t — 1981

SUZUKI 1981 GS650E GENERATOR​

suzuki gs650e — 1981

SUZUKI 1982 COMMUTER GS450ST GENERATOR​

suzuki commuter gs450st — 1982

SUZUKI 1982 GS450ET GENERATOR​

suzuki gs450et — 1982

SUZUKI 1982 GS450EX GENERATOR​

suzuki gs450ex — 1982

SUZUKI 1982 GS450EZ GENERATOR​

suzuki gs450ez — 1982

SUZUKI 1982 GS450GA GENERATOR​

suzuki gs450ga — 1982

SUZUKI 1982 GS450L GENERATOR​

suzuki gs450l — 1982

SUZUKI 1982 GS450SX GENERATOR​

suzuki gs450sx — 1982

SUZUKI 1982 GS450T GENERATOR​

suzuki gs450t — 1982

SUZUKI 1982 GS550M GENERATOR​

suzuki gs550m — 1982

SUZUKI 1982 GS650E GENERATOR​

suzuki gs650e — 1982

SUZUKI 1983 CRUISER GS300L GENERATOR​

suzuki cruiser gs300l — 1983

SUZUKI 1983 CRUISER GS450L GENERATOR​

suzuki cruiser gs450l — 1983

SUZUKI 1983 GS450TX GENERATOR​

suzuki gs450tx — 1983

SUZUKI 1985 GS300L GENERATOR​

suzuki gs300l — 1985

SUZUKI 1985 GS450GA GENERATOR​

suzuki gs450ga — 1985

SUZUKI 1985 GS450L GENERATOR​

suzuki gs450l — 1985

SUZUKI 1987 GS450L GENERATOR​

suzuki gs450l — 1987

SUZUKI 1990 GS500ET GENERATOR​

suzuki gs500et — 1990

SUZUKI 1995 GS500E GENERATOR​

suzuki gs500e — 1995

 

[Syd]

Canada. Yes and no. I’ve seen some different terminology; rotor assembly, generator etc. in the attached diagram it’s labeled as #3.

Do you mean pictures of my bike or something else?

Yes - pics of the bike. We like bike pics around here.

Cheers