1988 GL1500 problems...Gear selection and miss fire


Information and questions on GL1500 Goldwings (1988-2000)
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broon452
Posts: 14
Joined: Thu Aug 06, 2009 5:21 pm
Location: Bathgate, Scotland
Motorcycle: 1976 GL1000 gone
1980 GL1100 gone
1981 GL1100 being restored...maybe retirement to finish it
1988 GL1500

1988 GL1500 problems...Gear selection and miss fire

Postby broon452 » Sat Jun 18, 2016 8:42 pm



I have 2 problems with my 1500
1. It refuses to go into gear without cutting the engine off....no matter how I approach the issue whether I pull the clutch lever to the handlebars and gently tap it into gear or rev it up and try to quickly select a gear it is always the same...the engine dies. I have read numerous posts and have come to the conclusion it may be the gear selector in the front of the engine but before I strip it out does anyone have any other ideas?
2. There is a miss fire from tickover to over 2000revs....the silencers were shot so have replaced them but it is still there and today I had the plastic off so decided to see what happens when I take the plug leads off. (I now know this is a bad idea) when I pulled Nr 5 the engine started to seriously splutter and the same with Nr 3...but when I did 2, 4 or 6 there was no change. Knowing that it has 3 coils and they supply both sides I doubt it can be the coils and it is highly unlikely that all 3 leads/caps on the left side have gone at the same time...so that leads me to perhaps carbs. Can anyone advise what this could be?

all suggestions will be gratefully received

Hugh



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ct1500
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Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: 1988 GL1500 problems...Gear selection and miss fire

Postby ct1500 » Sun Jun 19, 2016 4:25 am

Gearshift sensor would not be the problem side stand switch could be. You do know that the engine is killed if put into gear with side stand down? Does the side stand light in dash work?

Left side carb would be the most likely problem with plugged idle jets after checking for vacuum leaks.
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broon452
Posts: 14
Joined: Thu Aug 06, 2009 5:21 pm
Location: Bathgate, Scotland
Motorcycle: 1976 GL1000 gone
1980 GL1100 gone
1981 GL1100 being restored...maybe retirement to finish it
1988 GL1500

Re: 1988 GL1500 problems...Gear selection and miss fire

Postby broon452 » Sun Jun 19, 2016 6:41 am

ct1500

I have been through the side stand.... had the switch off and checked continuity through the connections and all seems to check out ok ...Light on dash works as it should...on when down and off when up so not sure where this problem is going to lead me :?:

Don't particularly want to take the carbs off but how on earth do I check the vacuum pipes under the carbs?

Will check the carbs with balancer today and see if the readings are different but it could be something like dirt in the jets so maybe time for a strip down..

Cheers
Hugh

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seelyark1
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Re: 1988 GL1500 problems...Gear selection and miss fire

Postby seelyark1 » Sun Jun 19, 2016 10:27 am

ct1500 sure sounds correct on this one. Can you explain how you went about testing the side stand switch? As there are two circuits to that switch. One shows continuity in up, and the other when down. :)
Ride safe, and smart. Asphalt is like #1 grit sandpaper. Dave

broon452
Posts: 14
Joined: Thu Aug 06, 2009 5:21 pm
Location: Bathgate, Scotland
Motorcycle: 1976 GL1000 gone
1980 GL1100 gone
1981 GL1100 being restored...maybe retirement to finish it
1988 GL1500

Re: 1988 GL1500 problems...Gear selection and miss fire

Postby broon452 » Sat Jul 30, 2016 6:11 am

After some time away from the bike I went in and stripped the carbs and right enough ....the left hand carb was gunged up with greyish green deposits. I cleaned everything up but as I didn't have spare jets etc it was only a good clean. All the vacuum pipes were ok with no cracks or leaks. This has cured the low rev miss-fire and by using the balance screw on the left hand carb the engine now runs on all six cylinders from a tickover upwards and for the first time in a long time the engine is running properly.
However despite the gear selection working normally for the past week it has reverted to being a real sod! for a week or so it would go into gear easily and it would start if in gear with the clutch pulled in but now it won't start when in gear with clutch pulled in...... OR........ keep running when moved from neutral into either first or second gear.
It seems that there is an intermittent connection but I am lost as to where I start but will look at the side stand again.
ct1500. seelyark1 How do I check the operation of the side stand switch? I have disconnected at the first connector and checked continuity with stand up and down and everything appears to be ok. Light on dash works as it should so how do I go about testing further up the circuit?

I don't have much hair left so any help appreciated :?
Hugh




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