98 gl1500 back fires when on throttle


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ryans69mustang
Posts: 3
Joined: Tue Jun 05, 2018 6:30 pm
Location: tunkhannock, PA
Motorcycle: 1998 Honda gl1500 trike

98 gl1500 back fires when on throttle

Post by ryans69mustang » Tue Jun 05, 2018 6:44 pm



I have a 98 Honda gl1500 trike that will idle smooth but as soon as you try to give it throttle it starts to spit and sputter and back fires through the carb. I have done a compression test and it passed also checked timming and it is good. I have also taken the carbs out and cleaned them but no difference. if any one has idea please let me know thank you.



TwoTone Trike
Posts: 122
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Location: Mt. Sterling Kentucky
Motorcycle: 1999 Honda GoldWing 1500se/2012 Hannigan Trike, 1953 Panhead, 1973 Electra Glide sold

Re: 98 gl1500 back fires when on throttle

Post by TwoTone Trike » Tue Jun 05, 2018 9:56 pm

I'm new to the Goldwings, but when my old Harley Panhead would do that it was almost always the battery. Maybe try that first. Good luck and post back and let us all know what you find out.

ryans69mustang
Posts: 3
Joined: Tue Jun 05, 2018 6:30 pm
Location: tunkhannock, PA
Motorcycle: 1998 Honda gl1500 trike

Re: 98 gl1500 back fires when on throttle

Post by ryans69mustang » Wed Jun 06, 2018 7:16 am

I have put a new battery in it yesterday

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terryt
Posts: 181
Joined: Mon Jul 23, 2012 4:52 pm
Location: United Kingdom
Motorcycle: 1979 gl1000 trike
1989 gl1500 trike

Re: 98 gl1500 back fires when on throttle

Post by terryt » Wed Jun 06, 2018 8:25 am

Have you checked all the vacuum pipes

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virgilmobile
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Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 98 gl1500 back fires when on throttle

Post by virgilmobile » Wed Jun 06, 2018 8:57 am

Has it always done this?
This problem started when?
A new to you bike with this symptom?
Have the timing belts been replaced?

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Sadanorakman
Posts: 35
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Location: Leicester, ENGLAND
Motorcycle: 1991 GL1500 SE

Re: 98 gl1500 back fires when on throttle

Post by Sadanorakman » Wed Jun 06, 2018 9:13 am

My initial thought would either be ignition timing, or less likely valve timing. Does it idle smoothly on all cylinders, or does it have a miss?
There are two types of people in this world, those that can extrapolate from incomplete data,

ryans69mustang
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Joined: Tue Jun 05, 2018 6:30 pm
Location: tunkhannock, PA
Motorcycle: 1998 Honda gl1500 trike

Re: 98 gl1500 back fires when on throttle

Post by ryans69mustang » Wed Jun 06, 2018 12:12 pm

I have checked vacuum lines found one that was bad replaced it no difference. and this problem just happened recently and the timming belts have been replaced. it runs smooth on idle but as soon as you give any throttle the spitting and popping and back firing happens.

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virgilmobile
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Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 98 gl1500 back fires when on throttle

Post by virgilmobile » Wed Jun 06, 2018 12:23 pm

Were the timing belts replaced and then it had this problem?

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virgilmobile
Posts: 8357
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 98 gl1500 back fires when on throttle

Post by virgilmobile » Wed Jun 06, 2018 12:38 pm

I'm trying to get a handle on the time line and what may have caused this problem.
Something like...
The bike was running ok ..didn't have this problem before...then we serviced it and now it has a problem.
I look at what was serviced...
Or...The bike was running fine and developed this problem by itself and nothing we've done helped.

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virgilmobile
Posts: 8357
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 98 gl1500 back fires when on throttle

Post by virgilmobile » Wed Jun 06, 2018 12:40 pm

I've been lost in the Forrest a few times.Did too many things at once and had a problem...then trying to decide what I did wrong.

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ct1500
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Re: 98 gl1500 back fires when on throttle

Post by ct1500 » Wed Jun 06, 2018 5:53 pm

Popping back through a carb when cracking the throttle open is often a symptom of a very lean mixture and would usually be due to a carb not being able to supply the correct volume of fuel in either the main or secondary main circuit or a vacuum leak in one of the emission components. Does it pop back through one or both carbs? Also check for proper spark plug wiring/routing. Right coil cyls 1&2, middle coil cyls 3&4 and left coil cyls 5&6.
Local and need repair help with your 1500, Valkyrie or ST please click contact
Nothing leaves my shop till its' perfect
This is what I do

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terryt
Posts: 181
Joined: Mon Jul 23, 2012 4:52 pm
Location: United Kingdom
Motorcycle: 1979 gl1000 trike
1989 gl1500 trike

Re: 98 gl1500 back fires when on throttle

Post by terryt » Thu Jun 07, 2018 2:09 am

When you took the carbs off for cleaning did you reset the pilot screws



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