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TOPIC: Voltage regulator 1980 dt175g

Voltage regulator 1980 dt175g 01 Apr 2019 11:27 #1

  • Jolliroger
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Hello! Just wondering if there are alternative parts or if any one knows where to buy a voltage regulator orrr if they have interchangeability with Yamaha models or Honda and what not. I'm looking for one but there kind of expensive.

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Voltage regulator 1980 dt175g 01 Apr 2019 12:10 #2

  • Gr8uncleal
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I think that any automotive voltage regulator should do the trick. If you use the Search facility you should find plenty of posts on other members' preferences and recommendations.

Apologies for this, but just check whether your bike is 6v or 12v. Again, apologies!

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Voltage regulator 1980 dt175g 01 Apr 2019 14:49 #3

  • RT325
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This is what you want. It says regulator rectifier but is just a bulb saving regulator common to lots of Yamahas. You might find a cheaper one if you keep looking. Don;t think we can see all you guys do from down here in NZ, as someone said a lot of stuff is blocked from us--dunno why or if true. So just google like i did Yamaha DT175 voltage regulator or something like that. Cheers.

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Voltage regulator 1980 dt175g 01 Apr 2019 17:29 #4

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Good advice... I've found them as cheap as $5 on ebay.

Your bike should have come with one and it's not common for them to go bad... is yours missing?

DEET also has a three wire version that works well but would require a little bit of wiring vs. the original one-wire type your bike came with.

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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

Voltage regulator 1980 dt175g 01 Apr 2019 23:01 #5

  • liferbiker
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I bought one of those 3 wire units Deet likes, simple to wire, 1 voltage in, 2 voltage out 3 ground, its actually a regulator off an Italian scooter, It was reasonable (not 5 bucks) but I saw Deets test and it convinced me it works

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Voltage regulator 1980 dt175g 02 Apr 2019 00:19 #6

  • Gr8uncleal
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RT325 wrote:


This is what you want. It says regulator rectifier but is just a bulb saving regulator common to lots of Yamahas. You might find a cheaper one if you keep looking. Don;t think we can see all you guys do from down here in NZ, as someone said a lot of stuff is blocked from us--dunno why or if true. So just google like i did Yamaha DT175 voltage regulator or something like that. Cheers.


I recently found out that we can't see DEET's ebay listings in the UK unless we search under ebay.com - might be worth trying that in NZ.

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Voltage regulator 1980 dt175g 02 Apr 2019 05:46 #7

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liferbiker wrote: I bought one of those 3 wire units Deet likes, simple to wire, 1 voltage in, 2 voltage out 3 ground, its actually a regulator off an Italian scooter, It was reasonable (not 5 bucks) but I saw Deets test and it convinced me it works


Let me clarify, it's not as simple to wire the three-wire on a later bike that came with the Yamaha one-wire voltage regulator that tees into the charging system.

Using a stock regulator on a later bike - install the regulator in the factory location using the factory ground wire at the mounting bolt (if mounted to plastic), plug in the one wire into the existing harness connection, done.

Using a three-wire, locate the headlight circuit wire in the harness, find a place to mount the new regulator splice the new regulator into the harness, add a ground wire.

It's certainly not impossible to install the scooter regulator on a later bike, just not nearly as easy as replacing OEM.

Now if you're installing a regulator on an early bike that never had one, the installation is not much different in difficulty between the two types.

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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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