- Mar 1, 2007
The valve guides in my 1974 850-- R10 Cylinder head are made of brass. Do you think these were stock or should they have been cast iron or steel??? The head only has 2000 original miles but the previous owner pulled the head and polished the intake ports and rocker arms likely at Storm Cycles in Texas years ago. There were also roller washers installed inbetween the rockers and the edges of the inside of the heads. Why polish the rockers and why the roller washers???Valve stem wise there is not much axis to axis side play so I am thinking I will just lap the valves with a good compuond and go ahead with re-assembly. The valve edges and seats look great with no pits or burns. I will be an occasional weekend rider. No trips longer than 150 miles rarley. Thanks for any advise--Mark C.