23 hp vanguard valve adjustment

kawasaki · 09-08-2015, 05:02 PM

Before I did the adjustment they where at .010 to .012. Adjusted them to .005.Runs a little smoother but seems to have lost just a little bit of power. Is that normal?

Streetbu · 09-08-2015, 06:10 PM

It is possible, having lash set loose will pick up torque but lose hp, set tight will increase hp and lose torque. You must have a pretty good butt meter to feel any difference on an engine with 23hp though! LOL

1989Marathon · 09-08-2015, 06:24 PM

Lash that is set too loose will move the power band up in the rpm range.
The tighter the valve lash is set, the power band will be lower in the rpm range. You are effectively changing the cam timing. Loose lash = retarded cam timing. Tighter lash = advanced cam timing.
Torque will generally be increased at lower rpms with tighter lash.

slonomo · 09-08-2015, 07:59 PM

I never knew this! Great info guys. Makes sense!!!

kawasaki · 09-08-2015, 08:07 PM

Quote:

Originally Posted by 1989Marathon

Lash that is set too loose will move the power band up in the rpm range.
The tighter the valve lash is set, the power band will be lower in the rpm range. You are effectively changing the cam timing. Loose lash = retarded cam timing. Tighter lash = advanced cam timing.
Torque will generally be increased at lower rpms with tighter lash.

That's exactly what my butt meter was feeling. Thanks

1989Marathon · 09-08-2015, 08:08 PM

Quote:

Originally Posted by kawasaki

That's exactly what my butt meter was feeling. Thanks

It was just a guess. I could be wrong...

09-08-2015, 06:10 PM	#2
Streetbu Gone Wild Join Date: Jun 2012 Location: Central NY Posts: 1,020	Re: 23 hp vanguard valve adjustment It is possible, having lash set loose will pick up torque but lose hp, set tight will increase hp and lose torque. You must have a pretty good butt meter to feel any difference on an engine with 23hp though! LOL

09-08-2015, 06:24 PM	#3
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730	Re: 23 hp vanguard valve adjustment Lash that is set too loose will move the power band up in the rpm range. The tighter the valve lash is set, the power band will be lower in the rpm range. You are effectively changing the cam timing. Loose lash = retarded cam timing. Tighter lash = advanced cam timing. Torque will generally be increased at lower rpms with tighter lash.
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730

09-08-2015, 07:59 PM	#4
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,441	Re: 23 hp vanguard valve adjustment I never knew this! Great info guys. Makes sense!!!

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