Valve Adjustment Notes - Page 7

willy dog · 05-09-2017, 12:28 PM

gas will come out of the bigger vent fitting you just have to put it on the other side but i like the idea of not disconnecting tank i have not yet got filter back to were it was first time on side note drove the zong 1tenth of a mile to buddy's garage to adj. valves it was by no means hot took everything off to get it ready checked valves three hours later all good next day found one tight best let it sit overnight IMHO

SpudRider · 05-09-2017, 01:37 PM

Quote:

Originally Posted by fjmartin

Rather than fully removing the tank I simply lift the front end of it and put a 2x4 on end that is about a foot long there which gets the tank out of the way and I don't have to disconnect any wiring or hoses and no fuel spillage.

I would like to try your method, but I don't understand the placement of the 2x4 lumber.

The next time you check the valve lash, would you please take a photograph and post it here?

NoVa Rider · 05-09-2017, 09:39 PM

Last time I checked my valves I didn't move the tank at all. Just took off the side plastic body pieces. There is enough room to remove the intake valve cover and check valve clearance with tank still in place. Admittedly if you need to adjust an intake valve, a bit more clearance would be nice, although not necessary. Sounds like fjmartin's suggestion to use a scrap of wood to prop the front of the tank up would do the trick. For first timers, probably best to remove the tank to see more clearly what you are doing.

fjmartin · 05-11-2017, 05:09 PM

Spud, my plan is to do the valves either tomorrow or next week so I'll post an actual picture of what i'm doing with it but here is a crappy hand drawing of what it sorta looks like. I am NOT an artist :-)

SpudRider · 05-12-2017, 01:03 AM

Thank you, Joe.

I imagined you were raising the rear of the fuel tank, so I am eager to see where you place the wooden block to support the front of the fuel tank.

fjmartin · 05-12-2017, 03:33 PM

Here are the pic's of how I tilt the tank to make valve adjustments easier. The 2x4 is 11" long. I place it under the forward tank bracket and the steerer tube. It holds nice and steady.

fjmartin · 05-12-2017, 03:36 PM

Oh, and it had been about 3000 miles since I did my last valve check/adjust and the intakes were again exactly where they've been since about mile 2000 but the exhaust valves were just a little bit tight. They are now adjusted. I'm at just a bit under 7200 miles now on the bike. Take care!

SpudRider · 05-12-2017, 10:05 PM

Thanks for posting the photos, Joe.

TripwirePig · 06-03-2017, 10:29 PM

Why is it that when I set all four valves to 0.06mm and I crank he engine a couple of times then I go back to TDC. I check my clearance and like clock work, the exhaust valves are so tight that I can't fit a 0.06mm filler gauge. Then I check intake valves and its way over 0.08mm.

This is very frustrating.

Here's how I did it and see if anyone can find a flaw in the way I did it. (This is my second time and I didn't have this problem the first time!!)

1. Set TDC.
2. Set all four valves to 0.06mm.
3. Turn the engine two times and re-check.
4. I get same results as above!!!!!

WTF!!!

TripwirePig · 06-03-2017, 10:35 PM

Is there a different TDC for each valve (intake vs. exhaust?)

SpudRider · 06-03-2017, 11:33 PM

Quote:

Originally Posted by TripwirePig

Is there a different TDC for each valve (intake vs. exhaust?)

Yes, you must set the valve lash at TDC on the compression stroke.

Here is a foolproof method for finding TDC on the compression stroke.

Remove the two inspection ports at the top of the engine, and rotate the crankshaft in the counter-clockwise direction. Look for the "L" mark on the cam sprocket. After you see the "L" mark, carefully rotate the crankshaft until the "L" mark is aligned with the left inspection port, and the "R" mark is aligned with the right inspection port. When the cam sprocket is in this position, you are always aligned with TDC on the compression stroke.

You don't even need to open the inspection port on the flywheel.

Using this method, you will never make a mistake by adjusting the valves on the exhaust stroke, instead of the compression stroke.

TripwirePig · 06-04-2017, 12:12 AM

Where exactly are the two inspection ports located? Name: image.jpg
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TripwirePig · 06-04-2017, 12:30 AM

How come the valves are not loaded. They freely go up and down when I line up the TDC using the inspection ports?

Is this how it's supposed to be ? The valves freely go up and down?

SpudRider · 06-04-2017, 12:36 AM

Yes, you must have space between the rocker arms and the valve tappets when the crankshaft is at TDC on the compression stroke. All is well.

Set the proper valve lash, and you have completed the job.

TripwirePig · 06-04-2017, 02:05 AM

So after three tries I couldn't get the valve clearance right.
Thanks to SPUD, it made all sense to me--I was doing it wrong on my first valve clearance check.

It took me 4 tries and two days to get it right the second time.
Thanks Again SPUD!!

At least now I know how to tear down my bike for th next valve check.

She's up and running!!

05-09-2017, 12:28 PM	#91
willy dog Join Date: Oct 2015 Location: vermont Posts: 238	gas will come out of the bigger vent fitting you just have to put it on the other side but i like the idea of not disconnecting tank i have not yet got filter back to were it was first time on side note drove the zong 1tenth of a mile to buddy's garage to adj. valves it was by no means hot took everything off to get it ready checked valves three hours later all good next day found one tight best let it sit overnight IMHO __________________ Peace and Zong Life
	1

05-12-2017, 01:03 AM	#95
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Thank you, Joe. I imagined you were raising the rear of the fuel tank, so I am eager to see where you place the wooden block to support the front of the fuel tank. __________________ 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

05-12-2017, 03:36 PM	#97
fjmartin Join Date: Sep 2016 Location: Redmond, WA. Posts: 534	Oh, and it had been about 3000 miles since I did my last valve check/adjust and the intakes were again exactly where they've been since about mile 2000 but the exhaust valves were just a little bit tight. They are now adjusted. I'm at just a bit under 7200 miles now on the bike. Take care! __________________ 2017 BMW F800GS Adventure
	2

05-12-2017, 10:05 PM	#98
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Thanks for posting the photos, Joe. __________________ 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

06-04-2017, 12:12 AM	#102
TripwirePig Join Date: Apr 2015 Location: SF East Bay Posts: 12	Location of inspection ports? Where exactly are the two inspection ports located?
	0

05-09-2017, 09:39 PM	#93
NoVa Rider Join Date: Jan 2015 Location: Northern Virginia Posts: 144	Last time I checked my valves I didn't move the tank at all. Just took off the side plastic body pieces. There is enough room to remove the intake valve cover and check valve clearance with tank still in place. Admittedly if you need to adjust an intake valve, a bit more clearance would be nice, although not necessary. Sounds like fjmartin's suggestion to use a scrap of wood to prop the front of the tank up would do the trick. For first timers, probably best to remove the tank to see more clearly what you are doing.
	2

06-03-2017, 10:29 PM	#99
TripwirePig Join Date: Apr 2015 Location: SF East Bay Posts: 12	Why is it that when I set all four valves to 0.06mm and I crank he engine a couple of times then I go back to TDC. I check my clearance and like clock work, the exhaust valves are so tight that I can't fit a 0.06mm filler gauge. Then I check intake valves and its way over 0.08mm. This is very frustrating. Here's how I did it and see if anyone can find a flaw in the way I did it. (This is my second time and I didn't have this problem the first time!!) 1. Set TDC. 2. Set all four valves to 0.06mm. 3. Turn the engine two times and re-check. 4. I get same results as above!!!!! WTF!!!
	1

06-03-2017, 10:35 PM	#100
TripwirePig Join Date: Apr 2015 Location: SF East Bay Posts: 12	Is there a different TDC for each valve (intake vs. exhaust?)
	0

06-04-2017, 12:36 AM	#104
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Yes, you must have space between the rocker arms and the valve tappets when the crankshaft is at TDC on the compression stroke. All is well. Set the proper valve lash, and you have completed the job. __________________ 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
	1