Adjusted valve clearances. Now it's clicking...

[Jurlie_imp]

Hey all.

Today I've assembled my bike after replacing valve clearance shims; and was pretty unhappy to hear distinct clicking in the head around 4th cylinder when I've started the engine (intake I guess, but I'm not pretty sure).

Here is the data:
Clearance before (shim size) clearance after (shim size)
1.
ex1 0.31 (200) 0.25 (205)
ex2 0.33 (198) 0.28 (202)
in1 0.18 (202) 0.17 (205)
in2 0.19 (202) 0.14 (208)

2.
ex1 0.30 (192) 0.29 (195)
ex2 0.33 (192) 0.29 (198)
in1 0.18 (202) 0.15 (205)
in2 0.20 (198) 0.13 (202)

3.
ex1 0.32 (190) 0.28 (195)
ex2 0.32 (190) 0.26 (195)
in1 0.19 (198) 0.14 (202)
in2 0.19 (195) 0.14 (200)

4.
ex1 0.30 (190) 0.30 (192)
ex2 0.30 (190) 0.29 (192)
in1 0.21 (195) 0.13 (202)
in2 0.21 (198) 0.12 (205)


As you can see intake clearances of 4th cyl are on tight end. Might it be the reason of clicking? Do I disassemble it again and put thinner shims?
Is it possible I've done something wrong during assembly?

I've got a copy of service manual, I was doing everything just as written (except of I used just motor oil instead of molybdenum oil solution and molybdenum grease for camshafts and shim buckets respectively), but it is possible I could do some mistake...

Any ideas are welcome!