Lagging between 2 & 3 thousand RPMs


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Jrmetcalf
Posts: 35
Joined: Thu Jul 29, 2010 4:14 pm
Location: Orlando,Florida
Motorcycle: 1987 GL1200 Interstate

Lagging between 2 & 3 thousand RPMs

Post by Jrmetcalf » Tue Apr 16, 2019 3:35 pm



I have an 85 Goldwing Rebuilt the carbs changed fuel filter,fuel pump,fuel lines. Idles perfect but it lags between 2 & 3 thousand RPMS. what are the symptoms of this problem



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newday777
Posts: 1163
Joined: Tue Jan 11, 2011 5:21 pm
Location: Milford NH summer and fall Oceanside, CA winters(N San Diego) with lots of miles riden between
Motorcycle: 2008 Cabernet Red. Level 4

1983 GL1100A Wineberry 36,000 miles

1975 CB750 K5 Planet Blue 7,800 miles

1976 CB750 K6 Anterris Red 25,000 miles

Past rides
1999A Restored and sold at 19,000 miles

1999SE Totaled by cager at 105,000 miles

Re: Lagging between 2 & 3 thousand RPMs

Post by newday777 » Wed Apr 17, 2019 4:07 am

What process did you use to clean the carbs?

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virgilmobile
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Re: Lagging between 2 & 3 thousand RPMs

Post by virgilmobile » Wed Apr 17, 2019 3:50 pm

Run the bike till it starts to "lag"..reach over and bump up the choke lever a bit.See if the engine picks back up.A carb needle lift was needed on mine to get it through the mid-range lean spot.
And no..you can't just leave the choke part way on

Jrmetcalf
Posts: 35
Joined: Thu Jul 29, 2010 4:14 pm
Location: Orlando,Florida
Motorcycle: 1987 GL1200 Interstate

Re: Lagging between 2 & 3 thousand RPMs

Post by Jrmetcalf » Sat Apr 20, 2019 4:26 pm

rebuilt the carbs,split them apart changed all needles jets o rings Idles perfectly,sync the carbs.not sure what else to do,frustrated changed the fuel line ,fuel filter,fuel pump

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newday777
Posts: 1163
Joined: Tue Jan 11, 2011 5:21 pm
Location: Milford NH summer and fall Oceanside, CA winters(N San Diego) with lots of miles riden between
Motorcycle: 2008 Cabernet Red. Level 4

1983 GL1100A Wineberry 36,000 miles

1975 CB750 K5 Planet Blue 7,800 miles

1976 CB750 K6 Anterris Red 25,000 miles

Past rides
1999A Restored and sold at 19,000 miles

1999SE Totaled by cager at 105,000 miles

Re: Lagging between 2 & 3 thousand RPMs

Post by newday777 » Sat Apr 20, 2019 4:58 pm

newday777 wrote:
Wed Apr 17, 2019 4:07 am
What process did you use to clean the carbs?

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Asphaltmaniac
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Location: Sparks Nevada
Motorcycle: 1977 Honda 550K. Sold.
1986 1200 Aspencade. Purchased as a non current brand new in the box 1988. Sold.
2006 1800 Goldwing
2017 BMW 1200 GS Adventure...

Re: Lagging between 2 & 3 thousand RPMs

Post by Asphaltmaniac » Wed Apr 24, 2019 7:17 am

Did you thoroughly check and or replace all any and all vacuum line and soft parts in and around the carbs or on top on the engine? friend of mine just finished doing what you did to his 96 1600. It idled just fine till the throttle was cracked. He wanted to blame the carb re-builder. Long story short........it was a split vacuum hose along with a few other soft parts.
Heat cycles, age take a toll on that stuff.



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