can shim clearance be set on a suzuki gs850 before the cylinder head is fitted to the engine?

Answer 1

????????? That's not the normal order. You could be close, but things will change when you put the head back on. Is it off the engine already?

A couple notes to add to Geo46er's answer:
When changing the clearance, DO NOT stack shims. Use only one. When installing the shims, place them with the size marking facing down. This keeps the cam from wearing it off.

Answer 2

I assume that you want to do this because you do not have the factory tool to remove the shims once the cams are in the bike, you can do it that way and it should be no problem. However, when taking your measurements make sure the cam position is as specified in the manual because it makes a difference. On those bikes you set #1 cylinder to TDC do both valves and #2 exhaust and #3 intake THEN set #4 to TDC do both valves and #3 exhaust and #2 intake. The clearence spec is .001-.003 inch, but .001 feeler strips are hard to find and ultra thin so just use a .0015 , if you can't get it in its too tight, if you can get .004 in its too loose. The factory shims come in .002 steps, and except some of them with an X after the number were half steps. Many times the numbers are worn right off or are hard to read check them wwith a micrometer to be sure.

Answer 3

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Answer 4

Always give year, make, engine size and model # when asking questions. We need all of that info to give an informed answer.
There's no need to, as you can adjust the valves with the cams installed and the head on the bike.
But if you were to adjust them while the head is off the bike, the #s won't be 100% accurate.
The cam chain is pulling down on the cams, which will change the clearances. But it's a good starting point.

Answer 5

if your still curious check out www.gstwin.com, that forum was very useful for maintnence when i had my gs500.