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Right side crank seal holder

  • StiLfun
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Right side crank seal holder was created by StiLfun

I have rebuilt 5 engines on 1972/73 Yamaha enduros, 125 & 175s. None of them have ever had the holder for the right crank seal when I take them apart. It is #25 on the crankcase - cylinder Dia. Do prior owners just leave them out when they are working on that side. Is it a critical part, I have never had a problem with seal coming out yet. I think it’s odd that all 5 have been missing this part. Thanks in advance 
16 Dec 2023 19:15 #1

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Replied by MarkT on topic Right side crank seal holder

Seal retainer service bulletin came out in mid-1972.  Not sure when they started installing the retainer during production but the early models didn't have them.

1973 models were likely in production in mid-72. 
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 Dec 2023 19:29 #2

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Replied by StiLfun on topic Right side crank seal holder

Thanks Mark
16 Dec 2023 19:50 #3

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Replied by RT325 on topic Right side crank seal holder

If they realy want to escape they'll come out at an angle with only one retainer so may as well have two [or none]. I guess you're ok with none & new seals fitting tight in te case.
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16 Dec 2023 22:51 #4

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