I'm an idiot. - Page 2

Weldangrind · 01-13-2011, 10:48 AM

Maybe it has a broken ring, which would certainly account for compression loss.

For the unfamiliar, if you connect an air hose to the spark plug hole, you can find where the compression is leaking. Slowly rotate the engine until it becomes obvious; air flowing out of the exhaust is a bad exhaust valve, air flowing through the carb (with the carb open) is a bad intake valve, and air flowing out of the crankcase breather tube is a bad ring.

You can either buy the adapter that screws into the plug hole or make your own. I made one by breaking the ceramic out of an old plug, removing the insulator and ground electrode and tapping the inside of the metal body to accept an air quick-connect fitting.

Barnone · 01-13-2011, 10:54 AM

W&G,
A broken ring makes sense since FastDoc says the cylinder wall is scored.

That is a nice looking bike that deserves to be repaired.

katoranger · 01-13-2011, 12:22 PM

I am leaning toward ring too. Slight chance of a wrist pin coming loose.

Doc. Need some pics.

FastDoc · 01-13-2011, 01:18 PM

I'll see about pulling the motor, but like I say I'd rather just get rid of it. I have a lot of time and some money into it at this point. Since one of our Washington members is interested in it, and I may be out in his area to look at a KLX, I'm inclined to put it back together and on the trailer.

recracer · 01-13-2011, 08:25 PM

don't feel bad about not checking compression first Doc . heck i am a mechanic and bought a 85 gl1200 goldwing in need of repair . so i charged it up and gave it a crank and it was running on the right bank only. right off the bat thought ,bet it's the left bank timing belt ,this being an 85 with 18,000 miles . i pulled the radiator and fairings to get there . belts were intact after all that . i pulled the 2 left spark plugs both fouled . felt a little like homer simpson at that moment , i resolve it needed belts anyway :oops:

kmoore · 01-13-2011, 10:09 PM

Quote:

bought a 85 gl1200 goldwing in need of repair

not trying to thread jack but if you need parts i have an 86 gl1200 im parting out pm me if you need anything

now back to the original topic

mizke · 01-13-2011, 10:45 PM

doc, you could prolly find a company that sells a complete top end.. awhile back i came across a yamaha warrior that had a something jacked up and on its way out in the top end. did some research and found a company that sells complete ready to bolt on top ends for a wide range of motors. the warrior top end kit was less then 200 with shipping..

id vote to fix it and then sell it if you wanted to.. you could net a good amount more cash in the end with the bike not only running, but having a brand new top end.

FastDoc · 01-13-2011, 11:06 PM

I've never heard of anyone breaking a Gold Wing in less than 100,000 miles! What did the prior owner do to that poor bike? 8O

I have someone coming over tomorrow to look at the Zong. :?

I look at it like this. If the bike could not last 3,000 miles without puking some major component I don't want to put more time into a poor machine. Plus, what else is wrong? Maybe it was a lubrication issue and the camshaft is galled? The mainbearings? What if I make it run and discover the clutch is shot and that's what killed the motor?

This particular Zong is not in the same category as Spud's excellent motorcycle.

On this forum, Mychinamoto, and on the Zong forum these GS250's seem to give nothing but trouble.

humanbeing · 01-14-2011, 09:53 AM

Quote:

Originally Posted by FastDoc

...On this forum, Mychinamoto, and on the Zong forum these GS250's seem to give nothing but trouble.

There's a common doggerel about ZS in Chinese: "è´ä¹°å®—ç”³ï¼ŒåŽæ‚”ç� �ˆç”Ÿ" :oops:

01-13-2011, 10:48 AM	#16
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Maybe it has a broken ring, which would certainly account for compression loss. For the unfamiliar, if you connect an air hose to the spark plug hole, you can find where the compression is leaking. Slowly rotate the engine until it becomes obvious; air flowing out of the exhaust is a bad exhaust valve, air flowing through the carb (with the carb open) is a bad intake valve, and air flowing out of the crankcase breather tube is a bad ring. You can either buy the adapter that screws into the plug hole or make your own. I made one by breaking the ceramic out of an old plug, removing the insulator and ground electrode and tapping the inside of the metal body to accept an air quick-connect fitting. __________________ 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

01-13-2011, 12:22 PM	#18
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	I am leaning toward ring too. Slight chance of a wrist pin coming loose. Doc. Need some pics. __________________ You meet the nicest people on a Honda Clone.
	0

01-13-2011, 01:18 PM	#19
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I'll see about pulling the motor, but like I say I'd rather just get rid of it. I have a lot of time and some money into it at this point. Since one of our Washington members is interested in it, and I may be out in his area to look at a KLX, I'm inclined to put it back together and on the trailer. __________________ Happy to serve.
	0

01-13-2011, 10:45 PM	#22
mizke Join Date: Aug 2010 Location: austin, tx Posts: 1,452	doc, you could prolly find a company that sells a complete top end.. awhile back i came across a yamaha warrior that had a something jacked up and on its way out in the top end. did some research and found a company that sells complete ready to bolt on top ends for a wide range of motors. the warrior top end kit was less then 200 with shipping.. id vote to fix it and then sell it if you wanted to.. you could net a good amount more cash in the end with the bike not only running, but having a brand new top end. __________________ 200cc beast replica,carsoli cdi,performance coil,fmf powercore 2,uni air filter,hour/tach meter,jetted mikuni carb,msr bars,moose racing grips,yz250f clutch perch,D.I.D chain
	0

01-13-2011, 11:06 PM	#23
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I've never heard of anyone breaking a Gold Wing in less than 100,000 miles! What did the prior owner do to that poor bike? 8O I have someone coming over tomorrow to look at the Zong. :? I look at it like this. If the bike could not last 3,000 miles without puking some major component I don't want to put more time into a poor machine. Plus, what else is wrong? Maybe it was a lubrication issue and the camshaft is galled? The mainbearings? What if I make it run and discover the clutch is shot and that's what killed the motor? This particular Zong is not in the same category as Spud's excellent motorcycle. On this forum, Mychinamoto, and on the Zong forum these GS250's seem to give nothing but trouble. __________________ Happy to serve.
	0

01-13-2011, 10:54 AM	#17
Barnone Join Date: Feb 2007 Posts: 1,351	W&G, A broken ring makes sense since FastDoc says the cylinder wall is scored. That is a nice looking bike that deserves to be repaired.
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01-13-2011, 08:25 PM	#20
recracer Join Date: Jul 2009 Location: Charles Town W.V. Posts: 849	don't feel bad about not checking compression first Doc . heck i am a mechanic and bought a 85 gl1200 goldwing in need of repair . so i charged it up and gave it a crank and it was running on the right bank only. right off the bat thought ,bet it's the left bank timing belt ,this being an 85 with 18,000 miles . i pulled the radiator and fairings to get there . belts were intact after all that . i pulled the 2 left spark plugs both fouled . felt a little like homer simpson at that moment , i resolve it needed belts anyway :oops:
	0