I have a '23 Kymco People 150i ABS scooter. Whenever I hit a manhole cover or any size pothole or bump in the road, one side of my windshields' stay squeaks or grinds. I tried shaking it and it does give slightly and makes the offending noise. The other side appears to be nice and tight. I believe they are 6mm bolts. What would be the recommended torque I could tighten this bolt to?