I adjusted the valves yesterday, and found that the gap in the intakes were generally about 0.05mm, instead of 0.10mm. The exhaust vales were 0.10, pretty close to the 0.12 recommended. is it normal for the gap to decrease over time? The engine sounds the same, was it really a big deal that it was a little off? Is it better to have too much of a gap than too little?