U didn't give much info on what Ur done and time frame..

for sure check the air pressure, then also the spokes....I check mine every yr.. Always some loose ones..

thats the two obvious ones after that if U lower the front end and not the rear that could also cause a problem..
Or if U lowered it front and rear that too may be the cause if something isn't right with the suspension...

 

If dude had a loose neck bearing he would definately notice a wobble while going straight too. Not just while turning like he stated....

Maybe while going 60+mph or so....

 

I had the same problem earlier this season. I did the fall away on the front end, that helped a little. Next was I made sure the front wheel was trued and balanced, that helped a little bit,but I could still feel that something wasn't right. I noticed a little bit of seeping on my front right fork leg so I changed the seals and put new fluid in that seems to have taken care of the problem. I too only do one thing at a time instead of two or three I like to understand why the bike did what it did, so for me it was the seals that did the trick, good luck.

 

Had a loose neck bearing - bike went straight just fine, and at all speeds. Accept at decel ~45 mph or going over a bump slowly the bike would clunk.

Per qbert, its not always "one thing" that causes a problem. Lots of great suggestions.

 

thanks to everyone. Ill check the neck bearings , tire pressure, loose spokes, and condition of the rear swing arm etc. I appreciate the input.