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dt 125 carb specs

  • Kh500
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dt 125 carb specs was created by Kh500

Hi everyone, can someone tell me what size main jet I need in my 76 dt125? Looking in the manual, one section says 100 main and onother says 140. What is correct?
16 Apr 2021 02:59 #1

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Replied by Gr8uncleal on topic dt 125 carb specs

Which model (electric start, 12v?) and which country of origin?
16 Apr 2021 03:11 #2

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  • Kh500
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Replied by Kh500 on topic dt 125 carb specs

Yes it is a 12 volt electric start. United states
16 Apr 2021 10:53 #3

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Replied by Gr8uncleal on topic dt 125 carb specs

Thanks.

Whilst I wouldn't take it as absolute gospel (after all, Yamaha parts lists are known to contain the odd error 

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), parts list on CMSNL shows 100 as standard.

I'd wait for others to confirm (or otherwise!), just to be sure.

What size was fitted in the carb when you got it?
16 Apr 2021 11:17 #4

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Replied by 2fishkev on topic dt 125 carb specs

Both of my 74 Dt125a’s, almost the same, came with 140 main jets. 

yamaha-enduros.com/index.php/workshop/wiki/101-1976-dt125c

tech library link for yours
Last edit: 16 Apr 2021 15:36 by 2fishkev. Reason: Link
16 Apr 2021 15:30 #5

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Replied by MarkT on topic dt 125 carb specs

Factory Tech Sheet for the DT125C says main jet is 100.  Earlier models were 140.

Emissions (both noise and exhaust) became much more of a problem in the USA in the mid-70's...  air filter housing may have received "muffling" modifications and often became more restrictive to lower noise levels.  Several Yamaha models had significant main jet size changes in 1976 that went along with air intake changes to meet noise emissions requirements...  RD350 is one of them.
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
16 Apr 2021 21:07 #6

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  • Kh500
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Replied by Kh500 on topic dt 125 carb specs

Thank you all for the replys. I wasn't able to read the jet that was in it, but I think I will try a 140 and go from there.
17 Apr 2021 10:48 #7

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