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Discussion Starter · #1 ·
Ok guys here is a good one for you. I ride my 81 GL500 around town no problems, except that it is starting a little hard right now. If I take it up on the Freeway which I do once a month for the weekend to go to my Army National Guard drill. She runs fine at around 6500 to 7000 RPM the problem starts after running for about 40 miles or so and I get off the Freeway. When I am sitting at the Gate waiting my turn to show my ID the Engine dies. The temp gauge jumps from the almost cold mark to about Half range. The bike almost refuses to restart. I have to crank the throttle full open pull the choke and crank the living shit out of it until it starts then if I let it idle it will die again right away have to keep reving the throttle to keep the engine going. What gives where should I start on this one.





Deacon
 

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1978 CX500 "The Grub", 1983 GL650I "Nimbus"
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Sensitivity to heat suggests an electrical failure. Try new plugs first. Then, check / bypass the resistors in the plug caps. Progress upstream from there.



R
 

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As above and.......





1:Coils breaking down with heat sometimes caused by a missing Air-dam on top of the engine if it's the kind of model that has them fitted like my Stock CXs.



2:Carburettors require a full and proper service and no air leaks at the carb boots.



Click here for carbs,



http://globalcxglvtwins.hostingdelivered.com/viewforum.php?f=19
 

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Discussion Starter · #4 ·
Thanks Guys I just replaced the spark plugs like 1 or 2 months ago but I replaced them again today. Now it sounds like it is missing just a little bit. Not constantly but just a little. I also have a massive oil leak front side of motor almost directly behind the radiator looks like it my be coming from the top side of that cover. Could this add to the problem other then the loss of oil and me constantly having to add.



Deacon
 

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Discussion Starter · #5 ·
Sensitivity to heat suggests an electrical failure. Try new plugs first. Then, check / bypass the resistors in the plug caps. Progress upstream from there.



R




How do I Bypass the resistor in the plugs caps??????
 

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The oil leak is likely the tach drive unit. If it's the gasket, it's a minor PIA to replace. If it's the cable seal, time to get creative as Honda no longer supplies that part.



Good luck.
 

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Discussion Starter · #9 ·
Is it an oil leak or oil usage?The two are not always the same.
Definately a LEAK!!! I went ahead and ordered the Tach Drive Seal, and the Cam seal just to make sure. And I also made a discovery in the process. My Bike is not a GL500 it is a CX500 that someone has dressed. So I have parts from both kinds of bikes all over this thing. LOL So I will have to change My Signature line.



Deacon
 

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Definately a LEAK!!! I went ahead and ordered the Tach Drive Seal, and the Cam seal just to make sure. And I also made a discovery in the process. My Bike is not a GL500 it is a CX500 that someone has dressed. So I have parts from both kinds of bikes all over this thing. LOL So I will have to change My Signature line.



Deacon


Don't worry about it.One of my CX has CB900 brake callipers and did haveCB400N forks on it.It now has a Ducati Electric fan installed
 

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Discussion Starter · #11 ·
Don't worry about it.One of my CX has CB900 brake callipers and did haveCB400N forks on it.It now has a Ducati Electric fan installed


How did you install an electrical fan as the fan on these bikes from what I understand is driven off of the cam shaft????? Or have I been miss informed



Deacon
 

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First the easy stuff. It's common on these bikes to have an oil leak from the front right side of the motor just behind the radiator. Your right boot will get a nice oil coating from this leak. Besides tach seal, another common cause is that the front engine cover gasket is leaking. To fix, you have to remove the radiator and then remove the front engine cover. Then you can replace the the old shrunken engine gasket.



Regarding your overheating issue, is your coolant up to the top of the radiator cap? Don't check the plastic jug, check at the radiator. If coolant level is up, then you might consider a new thermostat. If your temperature gauge is working and it sounds like it is, these bikes when running properly warm up fast ~ in 3 miles of riding ~ and temp gauge needle settles in at just left of center.



How's your oil level and what does your oil look like?
 

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Discussion Starter · #14 ·
First the easy stuff. It's common on these bikes to have an oil leak from the front right side of the motor just behind the radiator. Your right boot will get a nice oil coating from this leak. Besides tach seal, another common cause is that the front engine cover gasket is leaking. To fix, you have to remove the radiator and then remove the front engine cover. Then you can replace the the old shrunken engine gasket.



Regarding your overheating issue, is your coolant up to the top of the radiator cap? Don't check the plastic jug, check at the radiator. If coolant level is up, then you might consider a new thermostat. If your temperature gauge is working and it sounds like it is, these bikes when running properly warm up fast ~ in 3 miles of riding ~ and temp gauge needle settles in at just left of center.



How's your oil level and what does your oil look like?
Ok where do I check the radiator I can't see a cap or anything on the top of the radiator. Also when normally driving around town My needle on the gauge never Moves any higher then the first mark on the gauge. It never goes higher then that unless I go up on the freeway and drive for about 20 miles or so then jump off the freeway and it will jump up to halfway.
 

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Discussion Starter · #15 ·
Ok where do I check the radiator I can't see a cap or anything on the top of the radiator. Also when normally driving around town My needle on the gauge never Moves any higher then the first mark on the gauge. It never goes higher then that unless I go up on the freeway and drive for about 20 miles or so then jump off the freeway and it will jump up to halfway.


Ok I think I have found the Radiator cap in another diagram
 
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