I have a 1981 kz ltd 550 that I have had new from 1981, I have 13,000 mi on it now and I am starting to get some small amounts of oil leaking out of the valve covers and would like to tighten them down but do not know the tourque spec's. If anyone has that info it would be very welcome ...Thanks Bob

 

This is for the kz 250 79-81: Page 46
The 6mm bolts to 87 inch lbs and the 8mm bolts to 18.0 ft lbs. Follow the bolt tightening order embossed on the cylinder head cover.