Revised valve clearance check interval

[Flytech99_imp]

After reading the interview from the Honda engineer that designed the CB's engine, I started to realize the initial 8,000 mile valve check interval was probably based on good logic from Honda. Even though it's a Japanese Inline-4 (downsized from a proven engine) and should carry with it a reputation for rock-solid reliability, it wasn't designed without compromises. I think Honda deviated from their usual methodology in seeking a particular aesthetic, feel and sound, rather than going for efficiency and longevity. That's likely why the CB came out of the gate a bit under-stressed and over-maintained.

Seven years of production and analysis has probably given them the confidence to up the interval and market the change as a positive.