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Makotosun

DT250 engine year ID?

  • Zeph
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DT250 engine year ID? was created by Zeph

Hey guys, I have an old DT250, the engine is stamped DT1F-29468, trying to find the correct year, as I'd like to rebuild the crankshaft/conn rod when I tear into it next time, and it appears the early ones had a 24mm pin of the crank and the others have a 25mm, and the conn rod is a bit different. I don't have it torn down yet, so I can't measure it. It's currently running, but I know it has the smallest amount of vertical play in the rod. Thanks so much
06 Sep 2020 13:15 #1

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Replied by Bigdog302 on topic DT250 engine year ID?

I Think that is a 1971 DT1E. It should be a Piston port, not a Reed valve engine.
www.yamaha-enduros.com/index.php/workshop/usa-model-listing
2 1968 DT1s,1970 RT1M,1970 DT1C,1971 RT1B,1971 Honda Z50K2,1974 DT100A 1974DT250A,1974 Honda MT250,2 1975 DT400Bs,1975 Honda CR250M1,1978 DT175E,1979 Honda CR250R.
Dave
Jesus is Lord!
The following user(s) Liked this Post: Zeph
Last edit: 06 Sep 2020 13:36 by Bigdog302.
06 Sep 2020 13:34 #2

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