I ride my 50 Panhead that I've owned for over 30 years daily. If it ain't raining I'm riding.
This past July I rode her from Southern California to Sturgis and back. She ran, and runs, like a finely tuned watch, BUT... here lately I've noticed that she's wanting to idle higher than what I consider normal and adjusting the idle doesn't seem to have the desired effect.
I also have noticed a slight "whistle" that goes away as soon as I crack the throttle even the slightest. I've done the WD-40 trick by spraying a very light spray through the little red tube that comes with the WD-40 onto the intake manifold and have proven to myself that I have a very minor intake leak where the forward intake adjustment fitting meets the head.
It's NOT the O-ring(s) on the manifold tube. It's definitely where the adjuster threads into the head.
The threads aren't messed up on either the head OR the adjuster and there are NO cracks that are evident and I've looked really closely with a lot of light.
I've tried high temp silicone gasket sealer...
I've tried teflon tape...
I've tried High Tack-High Temp sealer and I still seem to have the same intake leak.
Can anyone tell me what these were originally sealed with, or what to use to get it to seal?