Please help!!!

[robl]

Well i'm new to these forums, and well, I own a gs 500e. Here is the problem i'm having.. I purchased the bike cause it was DIRT cheap. I knew it had some issues but for the price i paid it was worth it.. I did a compression test Once dry with the throttle wide open and once with a couple of drops of oil in the cylinders. Well turns out that once of my cylinders had ZERO compression on both tests. Knowing that I took the heads off thinking that there was a bad valve. well turns out that there is nothing wrong with the valves.(had it double checked at the shop) so I proceeded to put everything back together. I set the timing according to specs, tried to start it and NOTHING!! so did a compression test again.. Guess what? no compression in either cylinder now. so I proceeded to take the valve cover off, and looked at the cams. well now all the shims are tight.. Can't get a 0.001 feeler gauge in there. So I removed the cam(again) took the buckets out, looked inside for possible carbon or dirt or something, NOTHING! put it all back togher, same problem. Now I forgot to mark what cylinder the buckets came from, and they were not easy to get back in to place.
So what i'm asking is what could I have done wrong?? how is it possible that all of a sudden after taking the heads off that the shims are to tight??
I looked around the forums to see if anyone else was having the same problem but to no avail..

[robl]

anyone?

[gtscott]

are you sure your compression gauge is working? are you sure the cam timing is correct on the chain?
is it zero compression or just realy low compression?
what did the piston look like when you removed the head? what did the bore look like?, did you also remove the block to look at the condition of the rings and the rest of the piston?
if with it all together you blow air down the spark plug hole (some compression gauges have a removeable peice to allow you to force compressed air into the cylinder) does it come out threw the carby, exhaust or oil filler cap?
when you say you cant get a feeler gauge in there are you sure your checking the clearance at the right spot in the cycle? and not 180 degrees out? as if there is no clearance at any part of the cycle it could be holding a valve open
when the head was off did it appear to have one of the valves open at all?

also with the shim tightness, how did you get them back in, i hope you didnt hammer them in or anything, are they able to move at all now they are in? where they all hard to get in or just some, how difficult where they to get out?

[Suzguy01]

robl, did you end up figuring this out? I Know this was years ago but I have almost the same issue.

[gsJack]