Valve Adjustment

Adjuster · 03-21-2015, 01:46 AM

What do you guys think of this?

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humanbeing · 03-21-2015, 02:55 AM

sell ice to Eskimos

Tvnacman · 03-22-2015, 08:01 PM

http://www.nycscooterparts.com/#!pro...ol-(nycsp0051)

Weldangrind · 03-23-2015, 11:50 AM

I would never guess; I always use a feeler gauge.

I use a square head screw (which is called a Robertson), and I have it twisted into a marrette electrical connector. It works well.

SpudRider · 04-04-2015, 11:09 AM

I agree with Weld. It is not difficult to use feeler gauges, and they are far more accurate than guessing.

I also use a Robertson deck screw inserted in a wire nut.

SpudRider · 04-04-2015, 11:14 AM

I would buy this tool if I could find it at a decent price.

Weldangrind · 04-04-2015, 12:03 PM

You're a gentleman for referring to it as a Robertson, Spud.

tortoise · 04-04-2015, 12:10 PM

Quote:

Originally Posted by SpudRider

deck screw inserted in a wire nut

Probably works just as well as the expensive stuff.

Tempted to try the hot technique.

Mudflap · 04-04-2015, 02:13 PM

The hot technique works for some engines but not all. In most engines the valve lash grows as the engine heats up so if you set it to zero when hot you'll never get it started when cold since the valves won't close.

humanbeing · 04-04-2015, 03:17 PM

Quote:

Originally Posted by tortoise

Probably works just as well as the expensive stuff...

http://item.taobao.com/item.htm?id=38416302208 http://item.taobao.com/item.htm?id=38270223935

< $2 in motherland

SpudRider · 04-04-2015, 10:37 PM

Quote:

Originally Posted by humanbeing

http://item.taobao.com/item.htm?id=38416302208 http://item.taobao.com/item.htm?id=38270223935

< $2 in motherland

Thanks for posting the good links, Humanbeing.

Weldangrind · 04-05-2015, 11:51 AM

Those will be part of my next purchase.

tortoise · 04-05-2015, 03:23 PM

139QMB 50cc screw adjuster square top measures around 3mm . . nut is 9mm . . so the H9 tool should be compatible.

Per this parts listing, all the GY6 50/125/150cc engines use the same adjuster screws and nuts.

Not really a great value, but the Motion Pro gauges work very well . . .002 inches for cold 50cc . . .004 inches for cold 125/150cc.

Since GY6 are a frequent gremlin and while access is open, loosen clamp and slide carb back from manifold, scrape/file any mating casting bumps, and apply a very light smear of silicone grease (not RTV sealer) on the join surfaces to deter leaks. Replacement resource (single vacuum port).

Also only takes a few minutes to test battery and charging volts to monitor those gremlins.

Adjuster · 04-05-2015, 04:40 PM

The tools are available on Ebay for less than $10 with free shipping. Think I saw them as low as $7.

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Adjuster · 04-05-2015, 05:13 PM

Here it is.

http://www.ebay.com/itm/Cars-Trucks-...394869&vxp=mtr

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03-21-2015, 01:46 AM	#1
Adjuster Join Date: Dec 2014 Location: Deerfield Beach FL Posts: 1,410	Valve Adjustment What do you guys think of this? /
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03-21-2015, 02:55 AM	#2
humanbeing Join Date: Mar 2008 Posts: 2,436	sell ice to Eskimos __________________
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03-22-2015, 08:01 PM	#3
Tvnacman Join Date: Aug 2013 Location: NYC Posts: 30	http://www.nycscooterparts.com/#!pro...ol-(nycsp0051) __________________ http://www.nycscooterparts.com/ For tech help call John 2125980016
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03-23-2015, 11:50 AM	#4
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I would never guess; I always use a feeler gauge. I use a square head screw (which is called a Robertson), and I have it twisted into a marrette electrical connector. It works well. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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04-04-2015, 11:09 AM	#5
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	I agree with Weld. It is not difficult to use feeler gauges, and they are far more accurate than guessing. I also use a Robertson deck screw inserted in a wire nut. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
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04-04-2015, 11:14 AM	#6
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	I would buy this tool if I could find it at a decent price. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
	0

04-04-2015, 12:03 PM	#7
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	You're a gentleman for referring to it as a Robertson, Spud. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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04-04-2015, 02:13 PM	#9
Mudflap Join Date: Sep 2014 Posts: 1,870	The hot technique works for some engines but not all. In most engines the valve lash grows as the engine heats up so if you set it to zero when hot you'll never get it started when cold since the valves won't close.
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04-05-2015, 11:51 AM	#12
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Those will be part of my next purchase. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

04-05-2015, 03:23 PM	#13
tortoise Join Date: Jan 2008 Posts: 221	139QMB 50cc screw adjuster square top measures around 3mm . . nut is 9mm . . so the H9 tool should be compatible. Per this parts listing, all the GY6 50/125/150cc engines use the same adjuster screws and nuts. Not really a great value, but the Motion Pro gauges work very well . . .002 inches for cold 50cc . . .004 inches for cold 125/150cc. Since GY6 are a frequent gremlin and while access is open, loosen clamp and slide carb back from manifold, scrape/file any mating casting bumps, and apply a very light smear of silicone grease (not RTV sealer) on the join surfaces to deter leaks. Replacement resource (single vacuum port). Also only takes a few minutes to test battery and charging volts to monitor those gremlins. Last edited by tortoise; 05-05-2016 at 11:52 PM.
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04-05-2015, 04:40 PM	#14
Adjuster Join Date: Dec 2014 Location: Deerfield Beach FL Posts: 1,410	The tools are available on Ebay for less than $10 with free shipping. Think I saw them as low as $7. /
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04-05-2015, 05:13 PM	#15
Adjuster Join Date: Dec 2014 Location: Deerfield Beach FL Posts: 1,410	Here it is. http://www.ebay.com/itm/Cars-Trucks-...394869&vxp=mtr /
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