Savage_Greg wrote on 12/31/69 at 16:00:03:The reason I asked is because of a conversation that I had with Clive sometime ago. According to the lubrication schematic that I have there appears to be an oil passage across the front of the head in that area. I don't know if it is just my interpretation of the schematic or if there is no issue about it in this area.
Aside from that the only head work that I have done is to polish the intake. Did you remove the valves before grinding?
As you can see in the pic of my head, the old valves were still in it when I did the filing (I actually only used a flat file to cut down the "V"and a round file to open up the opening). I later removed the valves and guides and then brought the head to a machine shop to have the valve seats ground and new guides, valves, and springs installed. What grit of sandpaper did you use to polish the intake? I came across an article somewhere (using a search engine) that said not to go any finer than 80 grit on the intake as further polishing makes the fuel cling to the surface.
As for an oil passage in the area of the "V" across the exhaust port, I am thankful I was lucky enough not to find it! This is probably another reason to use utmost care when you decide how much you are going to file off.
Let's hope that Suzuki has used the same mould to cast the heads of the LS650 since they began producing them in 1986!
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