400 fse cam/valve clearances

[captainslow]

Hi
Ive just measured the valve clearances on my bike and they are bigger than what the manual says, my mate says that if the gaps are bigger then its ok and that it's when they are smaller that u need to do something about them is this true?

bit of xtra info:
the manual says inlet 0.15mm and exhaust 0.25mm clearance.
my bike measures inlet 0.20mm and exhaust 0.30mm

i'm just a bit concerned 'cos if the worst happens i wo'nt be able to afford a top end rebuild.

Thanks for ne advice