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What might this noise be

  • Tunnie
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What might this noise be was created by Tunnie

Hello, my Dt 100 is making a noise that I’m not sure what it means. The bike runs well and starts well. The noise is not affected by engine speed, it started after I changed the crank seals. I did have a bit of bother getting the clutch side off. Please don’t laugh but it sounds like blub blub blub blub with a rise in tone that repeats. What might this be? best wishes Tunnie.

 
25 Feb 2024 09:35 #1

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  • Schu
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Replied by Schu on topic What might this noise be

Try uploading a video to YouTube and then post a link to the video. That way we can hear what you are hearing.
Schu

CT1B, CT1C, JT1, JT2, DT360A, GT80B, DT100B, DT125B,
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25 Feb 2024 09:52 #2

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Replied by Tinkicker on topic What might this noise be

If it started after you changed the crank seals, there is where to suspect first.  If the clutch side is blowing, the noise could conceivably be coming from the transmission breather pipe?
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25 Feb 2024 09:55 #3

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Replied by Tunnie on topic What might this noise be

Thanks for replies will try to get the video 
25 Feb 2024 10:19 #4

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Replied by Tunnie on topic What might this noise be

Don’t want to sound too stupid but should you be able to blow or suck through the breather pipe or does it have some sort of valve on a Dt 100
29 Feb 2024 06:53 #5

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Replied by MarkT on topic What might this noise be

No valve in the transmission breather hose.  I have come across plugged hoses. 
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
29 Feb 2024 08:43 #6

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