No low end power


Information and questions on GL1000 Goldwings (1975-1979)
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dragonblood69
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Joined: Sat Apr 27, 2013 10:09 pm
Location: Dacono, CO
Motorcycle: 79 GL1000 Vetter

No low end power

Postby dragonblood69 » Sat Apr 27, 2013 10:44 pm



Pardon me if this has already been covered somewhere else...
I have a 78 GL1000 that I recently acquired. The long and short of the story is this: Sat for awhile, supposedly was gone over from stem to stern. Runs great at idle. Has had a few issues, oil leak, coolant leak ETC. Anyway, I have no low end power in any gear. Once i reach the 'power band' (3500-4500rpm) The bike takes off, almost throwing you back. I have adjusted the points, pilot mixture and the idle. We are at 5300+ ft in elevation, so i have adjusted for high altitude. This is the best tuning i can get, it was worse before. Power band wasn't until 5000rpm, and no throttle response from 1/4 to full throttle. It would take it's time getting up in speed. The bike runs great at idle and in the power band, but real doggish under 3000rpm. :twisted: The other day I was out riding, ran the fuel out of the main pick up, switched to reserve, started the bike up and when i took off, I had all kinds of low band power! :o Ran exceptionally well for a few miles then got doggish again. This is the second one I've owned and the other one ran way better than this... :?: I am thinking i may need to rebuild the carbs or that there is a blockage somewhere, petcock, tank?? Any thoughts our suggestions?? Thanks in advance


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virgilmobile
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Re: No low end power

Postby virgilmobile » Mon Apr 29, 2013 3:18 pm

dragonblood69 wrote: The other day I was out riding, ran the fuel out of the main pick up, switched to reserve, started the bike up and when i took off, I had all kinds of low band power! Ran exceptionally well for a few miles then got doggish again.


I guess you've answered your own question...You have a fuel supply problem...
Either the pre-filter screens in the tank,fuel filter or a leaking valve in the fuel pump....

Did you find it????

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dragonblood69
Posts: 6
Joined: Sat Apr 27, 2013 10:09 pm
Location: Dacono, CO
Motorcycle: 79 GL1000 Vetter

Re: No low end power

Postby dragonblood69 » Mon Apr 29, 2013 3:27 pm

Not yet, I'm going to drain the fuel tank when I get home and try and blow some compressed air through the tank. Disassemble the petcock, clean and reinstall. Checked the fuel pump, seems to be working properly. The diaphragm looked new to me. No obvious leaks. Thanks for the reply...
"It's not about what you ride, it's about the ride"...

bustedwing
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Re: No low end power

Postby bustedwing » Mon Apr 29, 2013 6:42 pm

I would suggest Seafoam fuel additive. Their have been many posts about it's usage, but in short if you have gunk in the fuel system, use a portion a during usage of course the engine will not run all that good as you are taking gunk and getting it to go thru the engine. But once you get it cleaned out you should see improvement.
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dragonblood69
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Joined: Sat Apr 27, 2013 10:09 pm
Location: Dacono, CO
Motorcycle: 79 GL1000 Vetter

Re: No low end power

Postby dragonblood69 » Mon May 06, 2013 8:29 pm

So after changing fuel filter, cleaning the fuel lines and removing the tank, cleaning the pickup tubes and cleaning out the petcock. No difference! I have however find out they there is no spark getting to 3 & 4 cylinders... Any suggestions on how to test the coils or what else to check...
"It's not about what you ride, it's about the ride"...

bustedwing
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Re: No low end power

Postby bustedwing » Mon May 06, 2013 8:54 pm

Now you have p
Chased it down to electrical. There are several help thread on this topic, just click your model and scroll thru till you find , there are several different ways to state, half engine cold, two cylinders not firing, etc but once you see it you will know what you are looking for. Good luck.
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Fred Camper
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Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: No low end power

Postby Fred Camper » Wed May 08, 2013 9:00 pm

Sounding like a coil to me, depending on which cylinders are cold.

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dragonblood69
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Joined: Sat Apr 27, 2013 10:09 pm
Location: Dacono, CO
Motorcycle: 79 GL1000 Vetter

Re: No low end power

Postby dragonblood69 » Wed May 08, 2013 9:15 pm

It's cylinders 3&4...
"It's not about what you ride, it's about the ride"...

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Fred Camper
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Re: No low end power

Postby Fred Camper » Sat May 11, 2013 3:22 pm

3 and 4 are on the same coil. So sounds lime a coil or that point trigger.




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