Quote:
Originally Posted by OneLeggedRider
What's up with all the guessing about valve clearance? Even as a young boy (I'm 48 now) and before I went to school the standard was always .003" intake and .004" exhaust. That's what every old mechanic used and it's still a safe bet today on almost any engine. Not too tappy and not too tight.
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It is the same reason carb cleaning/tuning is seen as a black magic voodoo art form. Most vehicles in the last 20-30 years have been EFI with hydraulic lifters. Motorcycles being the only real exception to that rule. Add to that the fact that most small engines these days are sold as "maintenance free" and you end up with a generation or two that was barely introduced to the concepts, or never had to deal with it at all.
I have had quite a few young guys ask me to show them how to set the valve lash on their Grom or other small bike. Once I show them how it is done, they kind of have a "really, that's it?" look on their face lol.