Confused about valve adjustment procedures

[gearhead13]

I always wondered why hydraulic valves were never a "standard" item on motorcycles, as they have become on automobiles.

• Cost?
• Oiling issues?
• Weight?

Honda had good luck with it on a couple of models, the VT1100 series has to be one of the lowest cost to maintain VTwins ever.

And the Nighthawk S demonstrated it could be used in a "hot rod"

From what I know from the automotive world, hydraulic adjusters cannot be used at high rpms that our bikes run at. The adjusters tend to "pump up" leaving the valves to not fully close at high rpm. Ok for a lumbering vtwin but not a gs or gsxr running 10k rpm or higher.

[Nessism]

From what I know from the automotive world, hydraulic adjusters cannot be used at high rpms that our bikes run at. The adjusters tend to "pump up" leaving the valves to not fully close at high rpm. Ok for a lumbering vtwin but not a gs or gsxr running 10k rpm or higher.

??? Did you not read the caption in the photo?