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Makotosun

1975 DT125 CARB

  • GEORGIA
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1975 DT125 CARB was created by GEORGIA

hello everyone
i got a 1975 dt125b from a barn find.i'am looking for a replacement carb for it.it has a bolt on carb.does ayone know were i could find one.
03 Aug 2020 09:56 #1

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Replied by Mothersbaugh on topic 1975 DT125 CARB

Sorry, no I don't. But you should be able to rebuild that one, as all necessary parts are available from either Yamaha or Mikuni. Is the carb damaged in any way? Float bowl corroded through? One thing about the rebuild: you learn a ton about how the carb works and how to tune it for altitude and temperature...
03 Aug 2020 11:16 #2

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  • GEORGIA
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Replied by GEORGIA on topic 1975 DT125 CARB

i took the carb apart and cleaned everything like new.
there is a small port in the bottom that i can blow air through,i know if it had fuel in it it would pour out.
it's were the banjo bolt goes in the bottom,seem's it's missing something
03 Aug 2020 12:22 #3

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Replied by yamahahaha on topic 1975 DT125 CARB

Are you talking about the MAIN jet #6 in diagram

www.partzilla.com/catalog/yamaha/motorcy...75/dt125b/carburetor
03 Aug 2020 12:52 #4

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Replied by GEORGIA on topic 1975 DT125 CARB

i need to take a picture tonight and post it.
yes with it screwed all the way in,i can still blow air through the port at the bottom
03 Aug 2020 13:48 #5

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Replied by Mothersbaugh on topic 1975 DT125 CARB

Is the seal (#7, same diagram) there in yours?
03 Aug 2020 15:15 #6

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Replied by darinm on topic 1975 DT125 CARB

If for some reason you carb is a disaster and can't be rebuilt, I have a '74 DT125 engine with carb sitting in storage. It will probably need a rebuild too, just thought I'd throw the offer out there as you're better off rebuilding an original Mikuni than buying a knock off.
1972 Yamaha CT2 175
1972 Suzuki TS185 Sierra
2000 Suzuki RM100
2003 BMW F650GS
2009 Yamaha WR250R
2013 Yamaha XT250
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03 Aug 2020 22:31 #7

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Replied by GEORGIA on topic 1975 DT125 CARB

This is the carb,when I put the carb together I can blow air through the hole in the bottom
04 Aug 2020 06:54 #8

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Replied by darinm on topic 1975 DT125 CARB

The hole facing you in the bottom bowl? (left in the photo) Pretty sure that should have a brass ball bearing as a plug. Let me dig around the forum for a bit as this happened somewhat recently in another post and they may have the size if I can find the post. Looks like you need a new o ring on the jet setter too (piece that sticks down into the lower float bowl)
1972 Yamaha CT2 175
1972 Suzuki TS185 Sierra
2000 Suzuki RM100
2003 BMW F650GS
2009 Yamaha WR250R
2013 Yamaha XT250
04 Aug 2020 09:09 #9

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Replied by darinm on topic 1975 DT125 CARB

www.yamaha-enduros.com/index.php/forums/...tor-questions#104406
1972 Yamaha CT2 175
1972 Suzuki TS185 Sierra
2000 Suzuki RM100
2003 BMW F650GS
2009 Yamaha WR250R
2013 Yamaha XT250
04 Aug 2020 09:15 #10

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