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Makotosun

Engine shuts off after 5-10 minutes and won't start back and backfires 75 dt125b

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Replied by jtb605 on topic Engine shuts off after 5-10 minutes and won't start back and backfires 75 dt125b

If the bike has points and starts back running ok for a short while , then you probably have a bad condenser. That is after cooling off. 
08 Jul 2021 18:35 #11

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  • Patroll330
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Replied by Patroll330 on topic Engine shuts off after 5-10 minutes and won't start back and backfires 75 dt125b

I found the problem , it was the coil. The 1975 Yamaha Dt125B sat for years I had to clean the fuel tank and carburetor. replace the points, condenser, pitcock, and brushes for the gen. Its running like a top.
10 Jul 2021 20:48 #12

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Replied by RT325 on topic Engine shuts off after 5-10 minutes and won't start back and backfires 75 dt125b

Can't beat the feeling of satisfaction having sorted it yourself. Good job.
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10 Jul 2021 20:54 #13

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Replied by MarkT on topic Engine shuts off after 5-10 minutes and won't start back and backfires 75 dt125b

Congratulations!
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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10 Jul 2021 23:27 #14

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Replied by shyted on topic Engine shuts off after 5-10 minutes and won't start back and backfires 75 dt125b

Victory !!!
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10 Jul 2021 23:53 #15

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Replied by Schu on topic Engine shuts off after 5-10 minutes and won't start back and backfires 75 dt125b

Well done!

Next?
Schu

CT1B, CT1C, JT1, JT2, CT2, RT3, DT360A, GT80B, DT100B, DT125B, DT175B, DT175C, DT250B, DT400B, Z50

Someday, you'll own some Yamahas
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11 Jul 2021 06:20 #16

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