Engine starting problem


Information and questions on GL1100 Goldwings (1980-1983)
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yoland
Posts: 40
Joined: Tue Aug 03, 2010 8:37 pm
Location: New Brunswick, Canada
Motorcycle: 1980 gl1100

Engine starting problem

Postby yoland » Wed Apr 20, 2011 3:24 pm



Ok this is what i did during the winter on my bike, i have change the timming belt did also a valve timming ,change the plugs, rebuilt one of the camshaft , bought a new Randar gas pump, change the air filter, change the oil and filter, rebuilt the brake front and rear..etc.. the engine just have 39 klic on it . When you try to start it, everthing is turning normaly and i have fire on the plug but it does not start... i followed everything the way you explain it on this site :oops: i know you are going to tell me to kleen my carburators but it was done last year...any other suggestions ...sorry about the spelling

Yoland



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virgilmobile
Posts: 7644
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Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Engine starting problem

Postby virgilmobile » Wed Apr 20, 2011 3:36 pm

Three basic things MUST happen for a cylinder to fire.First:enough fuel to air mixture(14 to 1).Second:compressing the mixture to at least 100 psi.Third:igniting the compressed mixture at the right time(near TDC).With that said,check the basics.Compression:expect 145psi,open throttle,each cylinder.Enough fuel in the carb bowls.Open a drain screw and capture the fuel.About a small shot glass full.While the plugs are out,hook them all on and lay on the block,crank it over and verify a good hot spark on the plug.Unless wires at the coil have been messed with,timing should be no problem.

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thrasherg
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Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: Engine starting problem

Postby thrasherg » Wed Apr 20, 2011 3:39 pm

Unfortunately you changed many things.. Are you 100% sure you have the valve timing correct?
What do you mean by rebuilt one of the cam shafts? Did you change the cam shaft or just set valve clearances?
Have you opened a drain screw on the carburetor float bowl to make sure there is fuel inside the carbs? If you fitted a new pump, it may be that there is an air lock or the system needs to be primed before it will pump fuel? Opening a drain screw will let us know that you are getting fuel to the carbs. I do not believe the air filter, oil filter or brake work will have any effect on your engine. If it worked before you changed the camshaft, timing belt and fuel pump, it is likely that you have either missed connecting or incorrectly connected some wires together, incorrectly timed the cam shaft or are not getting fuel to the carbs.

Try putting a small container underneath the carbs and open a drain screw and see if fuel comes out of the carb. If yes then we can assume you have gas (Could still be a blocked carb!), so either wrong valve timing or damaged valve gear.. Do you have access to a compression tester? If the valve timing was incorrect you may have bent a valve which would cause a lack of compression and make it hard to start.. But before we panic, lets check the basics, fuel, spark and compression.. You verified spark, lets check fuel and compression.

Gary

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yoland
Posts: 40
Joined: Tue Aug 03, 2010 8:37 pm
Location: New Brunswick, Canada
Motorcycle: 1980 gl1100

Re: Engine starting problem

Postby yoland » Wed Apr 20, 2011 4:34 pm

The camshaft was just rebuilt on the top where it makes the rpm and pump work great job by a pro . And yes i doo have gas because the plugs smell or have gas on them. The compression sims ok but i will have to check . I do have some small backfire..

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thrasherg
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Joined: Tue Oct 20, 2009 11:21 am
Location: Plano, TX
Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: Engine starting problem

Postby thrasherg » Wed Apr 20, 2011 4:43 pm

Your reply makes it sound like you have fuel, spark and compression.. If all 3 are there and it's not running, then something is occurring at the wrong time, this comes back to my first question, are you sure you have timed the camshafts correctly? As you have not touched the electrical side the spark timing should not have changed so I would suspect the camshaft is incorrectly timed..

Gary

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yoland
Posts: 40
Joined: Tue Aug 03, 2010 8:37 pm
Location: New Brunswick, Canada
Motorcycle: 1980 gl1100

Re: Engine starting problem

Postby yoland » Wed Apr 20, 2011 7:03 pm

Could you tell me if you look down at thé engine sitting on thé bike where do thé coil wires go ie do thé two left ones go to thé left and the Wright to thé Wright ?

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virgilmobile
Posts: 7644
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Motorcycle: 1988 GL1500 I
Previously owned
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83 GL1100 I
83 GL1100 standard
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Re: Engine starting problem

Postby virgilmobile » Mon Apr 25, 2011 8:11 am

No they do not.The wires cross.I'll look at mine to get you which wire goes to which plug.Someone else may know off the top of their head.

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virgilmobile
Posts: 7644
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Engine starting problem

Postby virgilmobile » Mon Apr 25, 2011 8:32 am

A little image search on GOOGLE resulted in this image.Ain't the internet wonderful?
Attachments

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yoland
Posts: 40
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Location: New Brunswick, Canada
Motorcycle: 1980 gl1100

Re: Engine starting problem

Postby yoland » Wed Apr 27, 2011 10:07 am

Thank you all, it's working like a charm, just need a little timming of the carbs my rpm is running at 1500 . The first owner had the coil wire mest out.. :D

Yoland

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littlebeaver
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Motorcycle: 1981 gl 1100 I , 79 Yamaha XS11
Special, 82 Kawa 750 CSR, 82 Kawa 750 LTD, 03 Kawa Nomad 1500, 99 Kawa Voyager 1200

Re: Engine starting problem

Postby littlebeaver » Wed Apr 27, 2011 4:19 pm

Wow... :shock: :shock: :shock: :lol:




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