Very Poor Acceleration


Information and questions on GL1500 Goldwings (1988-2000)
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Mag93_1500
Posts: 11
Joined: Wed Jan 18, 2012 11:20 am
Location: Beavercreek, OH
Motorcycle: 1993 GL1500A

Very Poor Acceleration

Postby Mag93_1500 » Wed May 06, 2015 8:21 pm



I want to share with you all about a problem I had. When I would go to accelerate very much at all the ol Wing would bog down and not much power. I could slowly accelerate and get up to around 65 mph. But as soon as I would try to pass or just running through the gears no power.
My first thought was a plugged fuel filter. I proceeded to take the OEM filter off and took the screen out and cleaned it thoroughly with carb cleaner. After some tearing apart of the carb area I thought to pull off the petcock assembly that is located just in front of the fuel cap. When I opened it up I found the rubber diaphragm with a tear in it. I have attached a couple of pics. One shows the petcock assembly missing where the red circle is. And the other pic is the bad diaphragm. I found a repair kit on eBay for $26. Just put this in the search area on eBay; Honda GL 1500 GL1500 Goldwing 1988-2000 Fuel Petcock Repair Service Kit 5-601
The dealer wanted $52 for the repair kit. The assembly is like $160 - $180. Just repair it.
I hope this helps someone! Be safe and ride with all safety gear
Attachments
Red circle is where the petcock assy. is located
Red circle is where the petcock assy. is located
Petcock Assy. and torn diaphraghm
Petcock Assy. and torn diaphraghm


Psalms 26:3

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WingAdmin
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Posts: 17045
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Very Poor Acceleration

Postby WingAdmin » Wed May 06, 2015 9:12 pm

I've done this to mine - you can get the kit from Cyclemax for $23: http://cyclemax.com/inc/sdetail/gl1500_ ... 8744/20457


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spiralout
Posts: 1044
Joined: Sun Feb 17, 2013 6:41 pm
Location: Alabama
Motorcycle: 1975 GL1000 (gone)
1980 GL1100I (with '77 1000 engine)
1996 GL1500 SE

Re: Very Poor Acceleration

Postby spiralout » Wed May 06, 2015 10:06 pm

Yep, I can see where that wouldn't hold vacuum very well. Here's what mine looked like when I changed it. Melted from some kind of solvent



and a carb slide, melted by the same solvent. That was some bad stuff PO put in the tank.

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Mag93_1500
Posts: 11
Joined: Wed Jan 18, 2012 11:20 am
Location: Beavercreek, OH
Motorcycle: 1993 GL1500A

Re: Very Poor Acceleration

Postby Mag93_1500 » Wed May 13, 2015 6:48 pm

To anyone who has read about my issue with poor acceleration. After I replaced the petcock assy diaphragm I still had poor acceleration. What I believe happened is that a small piece of the diaphragm got through to the carbs. I had called a Honda dealer service department and they told me the carbs probably needed cleaned. Would you like to guess how much they want to do that? Try between $500 - $600. I could not believe it. Consequently, I decided to pull the carbs myself and cleaned them. 8 hours later I had it running again and then crossed my fingers and toes and went for a test ride. I held my breath and twisted the throttle and YES! We were back in action. It sure feels good when we can fix things like this when the dealers want so much in labor.

Also, JSYK to pull the carbs and mostly putting them back in is a real pain. It is so hard to reattach the coolant lines on the front of the carbs. Be sure to use some Vaseline on the tubes and I used a Q-tip to put some on the inside of the hoses also. Do that on that right front hose that attaches to the base of the air cleaner. That hose is a pain too. Lube the base of the carbs and the rubber boots on the intake. The Vaseline really helps.

Good luck
Psalms 26:3

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WingAdmin
Site Admin
Posts: 17045
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Very Poor Acceleration

Postby WingAdmin » Thu May 14, 2015 9:33 am

Vaseline does work well, but it is petroleum-based, and I worry somewhat on whether or not it will over time degrade the rubber parts. Instead I will use a silicone lubricant (meant for lubricating weatherstripping in cars), or even better, K-Y Jelly.

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spiralout
Posts: 1044
Joined: Sun Feb 17, 2013 6:41 pm
Location: Alabama
Motorcycle: 1975 GL1000 (gone)
1980 GL1100I (with '77 1000 engine)
1996 GL1500 SE

Re: Very Poor Acceleration

Postby spiralout » Thu May 14, 2015 9:51 am

Yep. Feels good to tackle a job yourself that dealers charge ridiculous amounts for. Plus, you get the piece of mind that it was done right, no loose hoses, bolts, etc. I really enjoyed rebuilding my 1500 carbs except for, like you said, those particular PITA hoses :evil:




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