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Makotosun

69 CT1 Clean Up

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Replied by MarkT on topic 69 CT1 Clean Up

69 might have the "simple" system still where the taillight runs off the engine and not the battery.  Keep that in mind if you need a new switch.
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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03 Jun 2026 22:26 #71

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Replied by Phyllo on topic 69 CT1 Clean Up

Awesome looking bike, nice job!! Good luck on your start up!
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04 Jun 2026 05:35 #72

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Replied by pabdt on topic 69 CT1 Clean Up

Started it! Run GREAT!! Idles perfectly. I have one problem to fix. The oil pump is not pumping out oil at idle or apparently any other rpm. There is flow from supply tank and it was burped.

ANY suggestion welcome. I don't usually mess w/the oil pumps.

Here is test video. If you can not normally see imgur and see this ok, please let me know as I plan a more detailed video.  Yes, just a teaser video, much longer vid to come in next few days, hopefully today, tommorrow.

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1969 Yamaha CT1 175
1974 Yamaha DT125A
1974 Yamaha DT360A with SP96 Exhaust
Next…196x-197x Yamaha something.
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Last edit: 05 Jun 2026 14:22 by pabdt.
05 Jun 2026 14:17 #73

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Replied by pabdt on topic 69 CT1 Clean Up

Bonus! Dropped by the original owner's house. She came out and sat on the bike, claimed it was like 1969 again.
Mission complete.

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1969 Yamaha CT1 175
1974 Yamaha DT125A
1974 Yamaha DT360A with SP96 Exhaust
Next…196x-197x Yamaha something.
The following user(s) Liked this Post: MarkT, Snglsmkr, Ht1kid, pahiker
05 Jun 2026 15:55 #74

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Replied by pabdt on topic 69 CT1 Clean Up

Ok, my bad on the oil pump. dialed it up just a hair w/cable and its up and running.   Yamalube smokeless 2S oil is not smokeless, but I like a little smoke to let me know if its getting oil.

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1969 Yamaha CT1 175
1974 Yamaha DT125A
1974 Yamaha DT360A with SP96 Exhaust
Next…196x-197x Yamaha something.
Last edit: 05 Jun 2026 19:49 by pabdt.
05 Jun 2026 19:47 #75

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