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Mike, in Idaho
Mike, in Idaho
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#825849 10/06/20 11:27 pm
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Looks like the plug for the transmission shift plate spring and plunger is leaking after transmission is warmed up. My question is can i get to it if I remove the clutch hub, inter plate and front drive sprocket? I can see the engine breather and it has no oil coming from it.

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RUSS TILLEY #825857 10/07/20 1:25 am
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Its worth a try , the only other option is splitting the cases, thats a major strip down. This is an unusual place for a leak, is it dropping the gear box oil level?


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RUSS TILLEY #825858 10/07/20 2:24 am
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Are you sure it's not coming from the primary. The dang chain oiler can put fluid all over the place. One reason I run ATF in BSA primary is to tell the leaks by the red color. Does it smell like gear oil?


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RUSS TILLEY #825860 10/07/20 2:32 am
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I do not see it leaking anywhere else. I have removed the chainguard and the metal plate inside or the front sprocket. I will road test it again to check the leak. I installed a new gasket and used sealer on the plug when I assembled the engine so l hope I do not have to tear it apart.

RUSS TILLEY #825861 10/07/20 2:36 am
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Yes you can get to it by following the procedure you say.
Running a large sprocket can sometimes have the chain
undo the plug, best to leave off the fibre washer and just
use thread sealer.

RUSS TILLEY #825980 10/08/20 3:09 pm
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If the sprocket nut is a bit loose, there will be a leakage along the splines.

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RUSS TILLEY #826020 10/08/20 11:56 pm
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Yes, I always put sealant on the splines when installing a sprocket.


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RUSS TILLEY #827952 10/27/20 7:11 pm
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I removed the primary and front sprocket. It does not look like the cap for the transmission shift spring was leaking. It is tight and I used sealed and the fiber washer when it was installed. I had sealed up the nipple that the alternator wires come out of and it is not leaking. The only thing i found was the spring was broken in the seal that is in the plate behind the clutch. It did not look like the oil was coming from the engine breather but I guess it was possible. I am sure the breather was installed correctly. It will only leak after the bike is ran on the road. No leaks just setting. It looked like the oil was dripping from the trans shift spring plug. If it was coming from the breather any ideas what would cause it?


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