Frustrating 79


Information and questions on GL1000 Goldwings (1975-1979)
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MrHill06
Posts: 9
Joined: Fri May 01, 2015 11:01 pm
Location: broken arrow oklahome
Motorcycle: 79 gl1000

Frustrating 79

Postby MrHill06 » Fri May 01, 2015 11:35 pm



Hey guys im new to this site and I need some help with a 79 I just bought. Ive been messing with it for a few weeks trying to get it to run. I finally got it running decent and hit the streets. The problems im have are it starts back firing in high rpms on the right side only (dual exhaust no cross over) when I let off the throttle for a light or what not it dies like its not getting fuel anymore, but starts back up ok. Sometimes when I start it back up it back fires super loud like a shot gun going off or like the carbs are loading with fuel. Do you think this is a spark problem or maybe the carbs just need rebuilt? Any help would be appreciated.

Things I have fixed or replaced

new oil and filter
new plugs
synced carbs
new fuel lines and filter and fresh fuel
has elec. ignition from previous owner

thanks for any help

Anthony



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tom84std
Posts: 493
Joined: Fri Jul 13, 2012 7:40 am
Location: Arlington, Texas
Motorcycle: '84 STD 1200
2002 VTX1800
2007 Shadow 750
69 BSA Bitsa
2004 Virago
VW Trike

Re: Frustrating 79

Postby tom84std » Sat May 02, 2015 5:32 am

Backfiring can be caused from several different things. If it's running alright and not missing, I believe one cause could be fresh air getting inside the exhaust system through a leaky joint in the aftermarket exhaust. There's always unburned gasses and ignition in the exhaust system, all that's needed is a little air and you can get some popping or backfiring. Check the connection between the header pipe and muffler for a good seal. Make sure the head-to-flange joint isn't leaky at the bottom of the head. This is usually worse upon deceleration.

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dingdong
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Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Frustrating 79

Postby dingdong » Sat May 02, 2015 6:12 am

You could possibly have one of the modules failing on the electronic ignition. If you have a Dyna S this is a very common problem. You may have to send it back to Dyna for testing.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

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raven41951
Posts: 128
Joined: Tue Jun 10, 2014 8:36 am
Location: Haverhill, MA
Motorcycle: 2016 GL1800
1994 GL1500SE (sold)
1995 VT1100 C2 Shadow ACE (Gifted)
1975 Kawasaki 500

Re: Frustrating 79

Postby raven41951 » Sat May 02, 2015 9:43 am

Yes, all that but try something easy first.

A few years back I purchased a VTX 1100 that had been sitting for 3-5 years. I drained and replaced the fuel, new battery, air filter, new tires etc.

After two years of riding it still had a hesitation and idle issue and would backfire and stall when decelerating. I took it on some long rides to get the engine heat up high for an extended time but I had finally resigned my self to tearing down and rebuilding the carbs. Before I did, a friend of mine (boat owner and they know how to drop money into a hole) introduced me to Starbrite Startron. I used this in my new (to me)1994 Goldwing SE with 2300 miles (talk about not being used) and the idle increased by 250 rpm (there was no backfiring issue with the wing). I said what the heck and put a few ounces and filled the tank of the VTX and took it for a ride. After 50 miles the backfiring stopped, no longer stalled on deceleration and it plain ran like a charm.

What I am saying is get yourself some startron or sea foam and use it first. If it doesn't work then break out the tools.

MrHill06
Posts: 9
Joined: Fri May 01, 2015 11:01 pm
Location: broken arrow oklahome
Motorcycle: 79 gl1000

Re: Frustrating 79

Postby MrHill06 » Sat May 02, 2015 3:18 pm

Thanks for the help guys. Headed to the parts store now!

MrHill06
Posts: 9
Joined: Fri May 01, 2015 11:01 pm
Location: broken arrow oklahome
Motorcycle: 79 gl1000

Re: Frustrating 79

Postby MrHill06 » Sat May 02, 2015 10:49 pm

ok guys I ran some cleaner in with a fresh tank of gas and went on about a 15 mile round trip just to see if anything would change. Nothing much has changed all though I am able to pull up to a light now with out it completely dying. One thing I learned or noticed that if I don't put throttle into it to fast it will get up to higher rpms with out much back fire which is nice. But when I turned around and headed home tonight I decided to go a little faster so I got into about 4th gear and was at a steady cruise with little throttle it starts to bog really bad and when I slow down after that it back fires like crazy and dies like the carbs are loading up with fuel. Anymore ideas? Thanks again guys.

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raven41951
Posts: 128
Joined: Tue Jun 10, 2014 8:36 am
Location: Haverhill, MA
Motorcycle: 2016 GL1800
1994 GL1500SE (sold)
1995 VT1100 C2 Shadow ACE (Gifted)
1975 Kawasaki 500

Re: Frustrating 79

Postby raven41951 » Sun May 17, 2015 5:31 pm

Spark Plugs might do it.

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raven41951
Posts: 128
Joined: Tue Jun 10, 2014 8:36 am
Location: Haverhill, MA
Motorcycle: 2016 GL1800
1994 GL1500SE (sold)
1995 VT1100 C2 Shadow ACE (Gifted)
1975 Kawasaki 500

Re: Frustrating 79

Postby raven41951 » Sun May 17, 2015 5:42 pm

Or you could try more miles. What type of cleaner did you use? Are the spark plugs you used the right ones? I have just finished upgrading and maintaining my ride. New timing belts, shift support, air filter, sub air and cruise air filters. Added a 2 port usb PS in the left pocket, a battery tender sae charge cable and ran a cable to add heated grips. Found some hidden damage from a PO so I ordered some body parts from bike bandit. Went for a ride on our first 90 deg day and got stuck in traffic for 45 mins. Rad fans and low rpms killed the battery. Adding a volt meter now. I will NOT upgrade the alternator. Before that happens I will upgrade to a 2015 F6B!p

MrHill06
Posts: 9
Joined: Fri May 01, 2015 11:01 pm
Location: broken arrow oklahome
Motorcycle: 79 gl1000

Re: Frustrating 79

Postby MrHill06 » Thu May 21, 2015 11:29 pm

Well it's been awhile and I've been trying to put more miles on it with cleaner in the tank. I've gone threw about 2 tanks now with not much improvement. I finally broke down and ordered a randakks master rebuild kit. Will hopefully get that done within the next month or so. So while I have everything taken apart I was thinking about converting to a electronic fuel pump. Does anyone know a company that sales a kit? I was told randakks did but I don't believe he does anymore. Any help would be appreciated thanks guys




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