Hi, I've not had a chance to ride this 87 standard too much since buying it this spring. I rode a few times before checking my tire pressure and only then because slow turns gave me a feeling like the front tire wasnt true. The front was showing some cupping and when I checked it only had 15 pounds pressure. This week a close friend came to visit, we were riding a back road about 55 mph when I guess for the first time I let go of the handle bars with both hands and immediately got a sever front end wobble. With my friends help I was able to put it on the center stand and checked for any looseness and didnt find anything. It only does it when I let got the handle bars but its instant. I suspect the tire cupping is the cause but too poor to change it just because it has some cupping if thats not the issue. Im sure this has come up before but a searh didn't help me. What do you guys think.