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Makotosun

DT1 Crankcase Question

  • Quartermaster35
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DT1 Crankcase Question was created by Quartermaster35

I feel embarrassed to ask this, but I cannot determine what the hole in my crankcase is (see red arrow) ......... I believe it is supposed to have a plug in it?

Can anyone confirm for me please?

It isn't shown on the Yamaha parts breakdown shown on Partzilla site:

1973 Yamaha CT3 175

Prior Bikes:
1973 Suzuki TS90
1977 Yamaha IT175
1978 Suzuki 390SP
1980 Yamaha 175 Tri-Moto
1969 Yamaha DT1 250
1981 Yamaha XS650 Special
1982 Suzuki GS550ES
1982 Honda 250R
1984 Honda Nighthawk "S"
2005 Kawasaki KLR650
15 Dec 2020 04:33 #1

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Replied by Pedalcrazy on topic DT1 Crankcase Question

Yes a plug. It is probably shown on the transmission detail.
Edit...Look on the shifter detail.
1978 DT400E
1976 DT400C
1973 RT3
1971 RT1B
1968 DT1 (3)
The following user(s) Liked this Post: MarkT
Last edit: 15 Dec 2020 05:19 by Pedalcrazy.
15 Dec 2020 05:17 #2

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Replied by MarkT on topic DT1 Crankcase Question

Yup, those case plugs are usually shown in the transmission or shifter sections.
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
15 Dec 2020 05:50 #3

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Replied by Midlife Motor on topic DT1 Crankcase Question

Regarding the shorter clutch actuator/sprocket cover, this bike has a smaller one that I've seen on several bikes. Were these an aftermarket part?
It's better to remain silent and be considered a fool than to speak and remove all doubt.
15 Dec 2020 06:44 #4

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  • Quartermaster35
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Replied by Quartermaster35 on topic DT1 Crankcase Question

OK, Thank you for the quick responses this morning.......



Not sure why someone would remove the plug....???

It is a discontinued part (unfortunately)......any suggestions on how I might find one?

It appears to be part number 90338-32031-00
1973 Yamaha CT3 175

Prior Bikes:
1973 Suzuki TS90
1977 Yamaha IT175
1978 Suzuki 390SP
1980 Yamaha 175 Tri-Moto
1969 Yamaha DT1 250
1981 Yamaha XS650 Special
1982 Suzuki GS550ES
1982 Honda 250R
1984 Honda Nighthawk "S"
2005 Kawasaki KLR650
15 Dec 2020 06:45 #5

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Replied by Quartermaster35 on topic DT1 Crankcase Question

I have wondered the same thing....... It certainly appears to not be stock.
1973 Yamaha CT3 175

Prior Bikes:
1973 Suzuki TS90
1977 Yamaha IT175
1978 Suzuki 390SP
1980 Yamaha 175 Tri-Moto
1969 Yamaha DT1 250
1981 Yamaha XS650 Special
1982 Suzuki GS550ES
1982 Honda 250R
1984 Honda Nighthawk "S"
2005 Kawasaki KLR650
15 Dec 2020 06:48 #6

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Replied by bart.ives on topic DT1 Crankcase Question

90338-32031-00
PLUG, BLIND 214-18533-00 Check out the Shifter #1, it is located on that diagram!
Be Happy!
15 Dec 2020 06:49 #7

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Replied by bart.ives on topic DT1 Crankcase Question


Rendering Error in layout Message/Item: fopen(http://open.api.ebay.com/shopping?callname=GetSingleItem&appid=makotosu-08bc-47da-8e7d-68e3ee6e51ca&siteid=0&responseencoding=JSON&ItemID=123842387666&version=889&trackingid=&trackingpartnercode=9): failed to open stream: Connection refused. Please enable debug mode for more information.

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Replied by JGersh on topic DT1 Crankcase Question

Looks like you can get one here...

pro-formance-cycle.com/collections/engin...18533-00-90338-32031
2 - ‘68 DT1
‘70 RT1
‘70 CT1-B
2 - ‘70 HT-1’s
‘12 Triumph Scrambler
15 Dec 2020 06:59 #9

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Replied by Quartermaster35 on topic DT1 Crankcase Question

OK, Thank you everyone ........ (easy enough to solve).
1973 Yamaha CT3 175

Prior Bikes:
1973 Suzuki TS90
1977 Yamaha IT175
1978 Suzuki 390SP
1980 Yamaha 175 Tri-Moto
1969 Yamaha DT1 250
1981 Yamaha XS650 Special
1982 Suzuki GS550ES
1982 Honda 250R
1984 Honda Nighthawk "S"
2005 Kawasaki KLR650
15 Dec 2020 09:40 #10

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