Acceleratin Problem 3000-4000 RPMs


Information and questions on GL1100 Goldwings (1980-1983)
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bfrawley
Posts: 32
Joined: Thu Feb 17, 2011 12:54 pm
Location: Lake City, Pa
Motorcycle: 1983 GL1100 Aspencade

Acceleratin Problem 3000-4000 RPMs

Postby bfrawley » Sun Aug 05, 2012 10:07 am



I have an 83 GL1100 Aspencade. Lately I have noticed poor acceleration between 3000 and 4000 rpms when I am over half throttle. It bogs down and has no power. If i stay under about half throttle acceleration is fine. The closer I get to 4000 rpms the better it gets. When it bogs down, I can smell something that I think is unburnt fuel. I have replaced the plugs, and am going to try and replace the fuel filter and adjust the valves today.

Any suggestions on what else it could be? Carbs out of sync? Vacume Advance? I really need to get this fixed. I have a 2000 mile trip coming up.

As always, thanks for your help!!!!



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SteveB123
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Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: Acceleratin Problem 3000-4000 RPMs

Postby SteveB123 » Sun Aug 05, 2012 10:29 am

Carb out of sync would affect more than just that limited range, and the vacuum advance only has action during high vacuum, not more open throttle.

Yours sounds like carb slides aren"t, well...sliding!

Be sure and re-sync after you adjust the valve clearances.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

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bfrawley
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Location: Lake City, Pa
Motorcycle: 1983 GL1100 Aspencade

Re: Acceleratin Problem 3000-4000 RPMs

Postby bfrawley » Mon Aug 06, 2012 9:59 am

I swapped the fuel filter and adjust the valve cleariences yesterday. While doing the fuel filter the vacuum line on the left side came off up above the carburetor because there was no clamp. I don't know if it was already off or just loose so i got it secured again as well. After replacing the fuel filter I opened the old one up to look at it and it was full of crap. It was well over due. After a test ride, it is much better, but the bogging/sluggishness is still there just a little bit. I did do the test for the vacuum advance thing (sucking on the hose) and it seemed ok. I am going to call or swing by the shop today about resyncing the carbs.

bbells
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Motorcycle: 1982 GL1100 Aspencade

Re: Acceleratin Problem 3000-4000 RPMs

Postby bbells » Mon Aug 06, 2012 10:43 am

FYI: If you were able to change the filter you should be able to handle synching the carbs. Check out some of the instructions on the net. Just takes 2 Harbor freight vacuum gauges, a couple aquarium valves, and some nipples for the carbs. Total for me was about $25.

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bfrawley
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Motorcycle: 1983 GL1100 Aspencade

Re: Acceleratin Problem 3000-4000 RPMs

Postby bfrawley » Mon Aug 06, 2012 10:55 am

I have been considering doing it myself. I might put together a shopping list and give it a try.

bbells
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Location: Minneapolis, Minnesota
Motorcycle: 1982 GL1100 Aspencade

Re: Acceleratin Problem 3000-4000 RPMs

Postby bbells » Mon Aug 06, 2012 11:32 am

I thought of it as one of the projects on the bike that was pretty easy and fulfilling. I shied away from doing it on bikes for 35 years. Finally did it. Laughing at my fear now.

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littlebeaver
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Re: Acceleratin Problem 3000-4000 RPMs

Postby littlebeaver » Fri Aug 10, 2012 10:54 am

What would I do if this was my problem? I'd place the sync. gauges on the carbs and sync. the carbs at idle as usual with my 4 gauge sync. tool set up, after it's set and good, then I would raise the rpm's way up and watch all the gauges, if one of the pistons is hanging up or sticking you will see it by just looking at the gauges, they should all raise together, it will tell you which one it is.. :D

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bfrawley
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Motorcycle: 1983 GL1100 Aspencade

Re: Acceleratin Problem 3000-4000 RPMs

Postby bfrawley » Fri Aug 10, 2012 10:59 am

That is a good idea. It has been running better since I did the fuel filter and valve clearances. Probably more the fuel filter than the valves. I need to get some gauges and tubing to do the sync.

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littlebeaver
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Re: Acceleratin Problem 3000-4000 RPMs

Postby littlebeaver » Fri Aug 10, 2012 11:43 am

It can tell you alot, if it's not a slide sticking, then maybe its a bad wire, or plug, whatever it is not making the gauge raise like the others do it's something and you will find it..Good luck Mr. :D Can't do this with those single gauge set up all at once like you can with the 4 gauge set up..One of the best tools I ever purchased...

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twick23
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Re: Acceleratin Problem 3000-4000 RPMs

Postby twick23 » Sat Aug 11, 2012 9:47 am

I had the pull throttle cable brake and replaced both of them and seemed like I had a new machine. They were binding and not opening all the way.. I just thought it was SLOW!! Now it can make it to red line...




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