Sometimes start!


Information and questions on GL1500 Goldwings (1988-2000)
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bohdan
Posts: 230
Joined: Thu Apr 12, 2012 7:39 am
Location: Venice, Florida
Motorcycle: 1977 GL1000
1977 GL1000
1977 GL1000
1993 GL1500
2013 GL1800
2013 GL 1800 trike
2009 Yamaha

Sometimes start!

Post by bohdan »



Greetings Fellow Goldwingers.
I posted before, but I get better info all the time. My bike starts 90 percent but 10% it doesn’t. During the 10% it does get spark albeit on the one cylinder that is easy to get to without taking the Tupperware off. During cranking I do not smell any gas. I Go away depending on how much I crank, I put a charger on it and fires up the next day quite easily. Leaves me to ponder that it is not the auto shut off valve or the fuel pump since it dies start when it wants to. Maybe stocking float valve? Or could this be hampered by any components of the induction system? It’s a 93 aspy and carbs never rebuilt. Maybe it’s time ? Still going through Seafoam, on second tank. Needs to run to utilize. Anybody out there got any ideas? Mighty obliged



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DenverWinger
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Location: Denver, CO
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1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
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1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Sometimes start!

Post by DenverWinger »

You say there's spark (at least one cyl) when it doesn't start, this is good.

Since it DOES start most of the time that would lead me away from the carburetors and back to the fuel petcock, especially since you say no fuel smell on "No Start" days. The amount of vacuum for the petcock is small on just cranking, if the valve diaphragm isn't 100% it could cause this. Also could have low vacuum due to leak in vacuum line.

I tend to think it's not the pump, usually they either work or they don't, and when they don't they are done. That wouldn't cause a "sometimes no-start".

Try this - there should be fuel still in carb bowls left over from last time the bike was running. Work the throttle a couple times BEFORE hitting start button, the accelerator pump should put a couple shots of fuel from the bowls into the throats to get the bike going. Put choke on full and don't touch throttle when you hit the start button.

Try that and report back.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

User avatar
bohdan
Posts: 230
Joined: Thu Apr 12, 2012 7:39 am
Location: Venice, Florida
Motorcycle: 1977 GL1000
1977 GL1000
1977 GL1000
1993 GL1500
2013 GL1800
2013 GL 1800 trike
2009 Yamaha

Re: Sometimes start!

Post by bohdan »

Thanks will do. With my luck will be in the 90% days

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