blackgpz at rochester.rr.com
Sat Jan 13 18:35:39 PST 2007
When I set my valves, I use the second method you describe, Jay. It's
important that the rocker arm be on the base circle of the cam to get
accurate clearances. I agree with you that a couple of the rockers look
awful close to being on part of the lobe when using the "2 position" method.
I turn the engine so the cam lobes on the pair I want to check are opposite
the rockers. Then I know for sure I'm on the base circle of the cam before
clearance checking. Using this method also allows me to do all the intakes
then all the exhausts instead of hopscotching around the cylinder head. It
may take a few minutes more but your valve clearances will be more exact.
Just remember to always turn the motor forward (counter-clockwise as you
look at the engine from the timing cover side). If you overshoot, go around
again, don't back it up. And don't forget to take the rag out of the cam
chain tunnel opening before putting the valve cover back on. I forgot once,
it wasn't pretty.
Steve in Western NY
'02 Daytona 955i
"You Can't Fix Stupid", Ron White
----- Original Message -----
From: "Jay Loeppke" <jloeppke at charter.net>
To: "GPZ LIST" <GPzList at micapeak.com>
Sent: Saturday, January 13, 2007 8:54 PM
Subject: valve adjustment
> Another question for all you helpful GPZ owners out there, (You helped me
> through the carbs last time). I'am checking my valve clearance, between
> the helpful chart, instuctions found on the GPZ list and my service
> manual its going pretty good. I am a little puzzeled though at one
> point. I am sure I found TDC for the two position to check all valves.
> the problems lies with the #4 cylinder exhaust valves and #2 intake
> valves, the positon of the cam lobes do not look like there in the right
> positon and there is no clearance at theses points. Every other point
> makes sense. Other than #2 intake valves, all the rest are in tolerance.
> all the Exhaust valves are a "little" tight (.05-.07mm) with the
> exception of #4 which is zero. So I decided to check another way, and
> that is by putting the point of the cam lobe 180 degrees away from the
> basket. I checked all this way. All the measurements were the same
> except for the #2 intake (0 clearance before) now falls within tolerances
> like the rest, and the # 4 exhaust vales are a "little" tight like the
> rest also. What should I go by. Once I decide I will pull the needed
> This bike has 35k and I do not know the history of the so I'am
> going through the bike.
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