KCvale
In memory of KCvale 1959 - 2019
Yes, I clicked the link from the sticky 4-stroke Manuals TopicYo KC, notice the date of the OP?
https://motoredbikes.com/threads/engine-manuals.27040/
For this HS 142 manual their was nothing about the valves for the 142 in the manual or the topic so I added to it.
Ya, maybe a little wider gap would be better, .08mm in and .10mm out sounds nice, but always adjusted once it's warmed up ~5 minuets to seat the seat the valves, rockers and push rods.Honda GHX 50 recommends:
IN: 0.08 +- 0.02 mm = 0.06 to 0.1 mm
EX: 0.11 +- 0.02 mm = 0.09 to 0.13 mm
I'll go with the Honda specs over yours.
All I know is I haven't seen 'slow valve closure' from these settings, but I live live where it's hot and things move easy.
Thanks for the tip though.
The Bottom Line goal however remains the same:
Both valves need to close tight for the Compression/Fire cycle.
Then, each valve opens as wide and for as long as it can for the Exhaust/Intake cycle from a different lobe on the cam shaft.
The 2 rocker arms open space size (gap) determine when, for how long, and how wide the ports open.
The logic for delaying the intake and exhaust ports actual size and duration buy a bigger gap because the valves won't close fast enough, which would be the only purpose, is just, well, let's just say silly.
With regular oil changes and using good oil you should never see 'slow valves' but if you do just give the intake rocker arm gap another .01mm to the gap to give the exhaust a bit longer before the intake cycle starts, and then close earlier to seat before the compression cycle.
Regardless, the bigger the rocker arm gap, the less effect the engine is, period.
Like in a 2-stroke where the bigger the port and timing makes a difference that is important, it's the same thing you do here but with with actual port valves with adjustments that are easy to do with a little open end and alen wrenchs.
To Ale Man...
Follow me around and slam me all you want, I only come around to help where I can and brag about any cool builds I have done, not take your 'king of the forum' or whatever your childish status goal is.
Really man, maybe try just building a bunch of cool bikes and coming up with new parts and ways to do things with your time?
I know who I am and what I bring to share when I have time.
Maybe it's just me, but all I see lately from you is a vindictive bully.
Bully on Ale Man, hope it makes you feel more manly in your own eyes here.