Carb issues on 87 aspencade


Information and questions on GL1200 Goldwings (1984-1987)
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clay0483
Posts: 4
Joined: Sun Sep 07, 2014 3:48 pm
Location: Gladwin, Michigan
Motorcycle: 1987 aspencade gl 1200
1986 gl1200 Interstate

Carb issues on 87 aspencade

Postby clay0483 » Wed Apr 29, 2015 6:33 am



a
After reading lots of articles on carb rebuilding, I want to know how far the slides should open wen you hook a vacume up mine only open1\2 inch or so tks



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virgilmobile
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Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
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Re: Carb issues on 87 aspencade

Postby virgilmobile » Wed Apr 29, 2015 9:17 am

Mine were about that.i have a small wet/dry vac.I was more interested that they did open when I snapped the throttle and returned down.When I tested mine,one stuck up.I rotated the cap 180* and tested again.Fixed.
Pre-sync the throttle plates before you put them back on the bike.Much easier to do when you can see them.Get them to just open at the same time and amount.It makes the final sync much quicker.

clay0483
Posts: 4
Joined: Sun Sep 07, 2014 3:48 pm
Location: Gladwin, Michigan
Motorcycle: 1987 aspencade gl 1200
1986 gl1200 Interstate

Re: Carb issues on 87 aspencade

Postby clay0483 » Thu Apr 30, 2015 6:24 pm

thanks for the reply, I to am very frustrated with this bike, I started working on it last fall. I probably only rode about 250 miles, the bike never had any power, it had bin sitting for quit a few years prior. the bike would run at idle fine but wen you hit 65-70 mph it would fall on its face. So over the winter I tore it down cleaned the tank, rebuild the master cylinders, new pads, new tires striped the carbs down all new brass and o-rings, new vac lines, filter, ect. it sounded beautiful in the garage. When it finally warmed up enough here in central MI to take it out and ride, it was doing the same thing absolutely no power, when I got back after 5-6 miles the exhaust was glowing red hot all the way to the tail pipes, I thought maybe the muffler was plugged so off it came,still no diff, know I have pulled the carbs again to double check everything, any input would be appreciated. tks

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WingAdmin
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Re: Carb issues on 87 aspencade

Postby WingAdmin » Fri May 01, 2015 9:10 am

clay0483 wrote:thanks for the reply, I to am very frustrated with this bike, I started working on it last fall. I probably only rode about 250 miles, the bike never had any power, it had bin sitting for quit a few years prior. the bike would run at idle fine but wen you hit 65-70 mph it would fall on its face. So over the winter I tore it down cleaned the tank, rebuild the master cylinders, new pads, new tires striped the carbs down all new brass and o-rings, new vac lines, filter, ect. it sounded beautiful in the garage. When it finally warmed up enough here in central MI to take it out and ride, it was doing the same thing absolutely no power, when I got back after 5-6 miles the exhaust was glowing red hot all the way to the tail pipes, I thought maybe the muffler was plugged so off it came,still no diff, know I have pulled the carbs again to double check everything, any input would be appreciated. tks


OK, the glowing exhaust is literally the smoking gun. When the exhaust gets that hot, it means the fuel/air mixture is far too lean - the engine isn't getting enough fuel. That, along with the fact that you can't get past 65 mph, points directly to a fuel delivery issue.

If both exhausts were glowing, then the fuel issue is BEFORE the carbs - i.e. clogged tank, petcock, fuel filter or fuel lines, or a fuel pump incapable of delivering higher volumes of fuel.




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