Author Topic: Valve specs  (Read 2183 times)

sissy mary

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Valve specs
« on: April 13, 2012, 01:18:26 AM »
Maybe going to try to adjust my own valves? What are the settings for intake & exhaust? Also, do u need a tool to hold the piston wile doing adjustment?  :-*

Scumeda3

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Re: Valve specs
« Reply #1 on: April 13, 2012, 01:28:21 AM »
Is this adjustment needed on the '09 500Ri?  How do you know when?  Certain milage or wait until it starts running poorly?

sissy mary

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Re: Valve specs
« Reply #2 on: April 13, 2012, 09:11:44 AM »
Miles. 2007. :-*

MikeKymco

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Re: Valve specs
« Reply #3 on: April 13, 2012, 02:28:44 PM »
I'd check the owner's manual for service interval and the service manual for the specs.  I found both for my model/year here:  http://www.kymcoforum.com/index.php?topic=1689

Hoolander2

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Re: Valve specs
« Reply #4 on: April 16, 2012, 05:08:13 AM »
Right, I downloaded a free manual from one of those links.  Think I had to download a unzip program first called frog or something like that. 

Valves are .004 inch for both intakes and exausts.  I think that's .1 mm too. 

Search for my topic on my valve adjustment.  It talks about what all is necessary.  Pain in the you know what first time around.  Easier thereafter. 

No particular special tools but I did have to get a 9mm box end wrench and grind it thin to get onto the lock nuts.  Also could've used kymco special valve adjusting tool but made something out of ball point pen parts that worked half-ass ok. 

Lots of plastic to take off.  Accents on the sides of the floorboard, side skirts, floorboard itself, seat, underseat compartment.  Coil, thermostat need to be loosened and moved.  Must have some means of pulling down the whole back end of the scooter to get the engine in the right position so the valve cover comes up and out.  Need good to great lighting and hands/wrists like a monkey when adjusting.  :D 

Turn engine over by the varitor nut while watching for the "T" mark on the flywheel to line up with the line on the case.  (there are other marks on flywheel -- make sure with flashlight and magnifying glass you've got the "T") Dimples on cams must be straight up when T mark lines up or else go another 360 degrees around.

Since mine didn't have flywheel nut access hole like manual shows -- I had to sight into the timing mark hole while arm wrapped over scooter turning wrench on variator nut.  ;) Turn variator nut Counterclockwise!

Valve cover bolts are relatively weak as I found out when I broke one!  Don't over tighten.
« Last Edit: April 16, 2012, 05:26:29 AM by Hoolander2 »

MikeKymco

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Re: Valve specs
« Reply #5 on: April 16, 2012, 10:58:11 AM »
^ Thanks for the tips!

sissy mary

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Re: Valve specs
« Reply #6 on: April 16, 2012, 12:58:42 PM »
Yes, thanks once again. :-*

Hoolander2

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Re: Valve specs
« Reply #7 on: April 16, 2012, 06:29:04 PM »
You're welcome.  ;)  A member here said he used needle nose pliars to turn the adjusters.  Mine weren't long enough but next time I'll get some nice long ones to use.  Or it's possible to order/find valve adjusting tool from aftermarket sources.  Thing is, I'm not sure what size it is -- the adjustment knob just a typical tiny square knob. 

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