New Member Here: 78 DT100 Clutch Question. Please Help...

PLY478

Member
Sep 23, 2013
4
0
Ok 1978 Yamaha DT100. Resto project for this winter.

I wanted to get it running and driving before the tear down.

So it did not take me long to get it running fairly well. A few parts were missing, etc.

So I get it running. Let it warm up good.

Pull the clutch lever in.. Tap it down into 1st gear.. the bike jumps ahead.

Did not think much about it at first. Rode it for a bout 5 min. Parked it to check a few things, and adjust the clutch cable.

Well here's where things get to me.

I adjust the clutch cable, back and forth. Still nothing. I can not get it to release to ride...

I can start & run the engine... In gear, clutch out and it moves not an inch.

So can these cables stretch that much? Or do I have an actual clutch plate issue?

Could the oil in the case contribute to this?

What Oil should I run in the case?

The bike sat awhile. Inside a garage.

Could the clutch plates not be opening and closing? Stuck together?

How do I fix this?

Any help would be great...

Thanks
PLY478
 

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RM_guy

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Damn Yankees
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The plates could be stuck together I guess. I would suspect a notched basket and/or hub. The only way to know is to pull the clutch and look at it.

Looks like a fun project!
 

PLY478

Member
Sep 23, 2013
4
0
RM_guy said:
The plates could be stuck together I guess. I would suspect a notched basket and/or hub. The only way to know is to pull the clutch and look at it.

Looks like a fun project!


Thanks any other thoughts? Anyone have service manual that they can scan these pages on how to do this?

Also: Anyone have any parts bikes like this? I am looking for a few pieces.

Thanks
PLY478
 

Rich Rohrich

Moderator / BioHazard
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Jul 27, 1999
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It's not uncommon for the fiber plates to get really stuck to the steel plates when a bike sits for an extended period of time. But as RM_Guy pointed out you won't know until you take it apart. Sort of seems like we have a theme going here. :)
 
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PLY478

Member
Sep 23, 2013
4
0
Sorry thats not what I meant here. I understand that they may be stuck.


Anyone have service manual that they can scan these pages on how to do this?

The above is what I need to know.

Thanks
PLY478
 
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