Bogging at bit less than half throttle


Information and questions on GL1500 Goldwings (1988-2000)
Post Reply
tsandvik
Posts: 70
Joined: Mon Dec 14, 2015 2:05 pm
Location: Tampa, FL
Motorcycle: 1990 GL1500 Aspencade

Bogging at bit less than half throttle

Post by tsandvik » Sat Nov 23, 2019 2:32 pm



Bogging down bad when opening the throttle past a bit less than half.
Bike starts up in first (although feels weak) get thru to 2nd then have to start fidgeting with the throttle softly to get to 4K shift to 3rd.
From 3rd and 4th impossible to get the bike up to 3K. When the throttle is pushed wide open you can hear the plates open up and then all you hear is that deep throat-ed whahhhh sound.
50 is about the highest mph can get to, and that takes some time.

This is a new carb I just installed. All vacuum lines are connected and in correct locations. All other vacuum lines were replaced when the engine was installed.
I am at a total loss. My first gut reaction is fuel starvation. Is it possible the petcock is not allowing enough fuel to run at faster speeds, higher rpm's, higher loads?
In 1st it will run up to 4k with no real problem

Looking for any and all ideas of what to start looking for. Want to get back on the road down here in sunny Florida.



User avatar
Elmobile
Posts: 96
Joined: Sat Aug 22, 2015 8:35 pm
Location: Bridgewater, Nova Scotia, Canada
Motorcycle: 1990 GL1500SE

Re: Bogging at bit less than half throttle

Post by Elmobile » Sat Nov 23, 2019 3:38 pm

The first thing I would check without any history on the bike, is to make sure the fuel pump deliver the proper flow to the carbs. Easy to do and access. Do you have a service manual to follow the proper procedure? I’ve seen it posted before... Will try to post it later on.

tsandvik
Posts: 70
Joined: Mon Dec 14, 2015 2:05 pm
Location: Tampa, FL
Motorcycle: 1990 GL1500 Aspencade

Re: Bogging at bit less than half throttle

Post by tsandvik » Sat Nov 23, 2019 4:00 pm

Thanks. Have the service manuals for this year and style. Am going to try by passing the pet **** but when fuel line is disconnected I will do a flow test.

User avatar
Elmobile
Posts: 96
Joined: Sat Aug 22, 2015 8:35 pm
Location: Bridgewater, Nova Scotia, Canada
Motorcycle: 1990 GL1500SE

Re: Bogging at bit less than half throttle

Post by Elmobile » Sat Nov 23, 2019 6:21 pm

Good plan. That is what I would have suggested as the next step.Be careful when you test the pump that it is disconnected electrically so there is no adverse feed back to the ECU...
Good luck, Keep us posted.

User avatar
MikeB
Posts: 2630
Joined: Fri Dec 04, 2009 12:54 pm
Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A
2017 - GL1800 Audio Comfort
Contact:

Re: Bogging at bit less than half throttle

Post by MikeB » Sat Nov 23, 2019 11:10 pm

tsandvik wrote:
Sat Nov 23, 2019 2:32 pm
Bogging down bad when opening the throttle past a bit less than half.
Bike starts up in first (although feels weak) get thru to 2nd then have to start fidgeting with the throttle softly to get to 4K shift to 3rd.
From 3rd and 4th impossible to get the bike up to 3K. When the throttle is pushed wide open you can hear the plates open up and then all you hear is that deep throat-ed whahhhh sound.
50 is about the highest mph can get to, and that takes some time.
These are the exact symptoms I experienced when the fuel petcock failed on my '99 GL1500. Replacing it was the fix.
MikeB
Tacoma, WA, USA

User avatar
joeincalif
Posts: 750
Joined: Sat Nov 22, 2014 10:39 am
Location: Fresno, Ca
Motorcycle: 1997 Gold Wing SE

Re: Bogging at bit less than half throttle

Post by joeincalif » Sun Nov 24, 2019 9:43 am

Same thing that happened on my 97 SE. Bypas the petcock, hope that cures it


Image
IF YOUR BORN ONCE YOU WILL DIE TWICE
IF YOUR BORN TWICE YOU WILL DIE ONCE

Post Reply