Engine shuts off on slow down

Information and questions on GL1500 Goldwings (1988-2000)
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Posts: 2
Joined: Tue Aug 21, 2012 10:27 am
Location: Wichita, Kansas
Motorcycle: 1990 GL1500 SE

Engine shuts off on slow down

Post by Bowhunter » Thu Aug 30, 2012 11:30 am

First events: several months back when slowing down engine simply shut off between down shifts or coasting to a final stop, like turning the kill switch to off. Engine always (instantly) restarts when clutch is released or with start button. Last week same issue only was accelerating when engine stopped as I was shifting 2nd to 3rd and 3rd to 4th on same acceleration and restarted when clutch was released both times (has not happened again in 50 miles). Yesterday, this happened on slow down 3-4 times in a few blocks thus I am leery of riding till repaired. All systems appear in good shape, no apparent voltage issues (instant start all conditions and good lights and radio). I have noticed a slight rough idle and maybe more noise then normal with choke on cold start. Usually takes ¾ -full choke to start and maintain idle when first started unless ridden immediately.

Related or unrelated I do not know but, with carb exposed right carb sounds like a diesel engine with or without choke till 1500 when it instantly quits. Will make noise again momentarily if throttle is blipped hard. :(

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Joined: Tue Mar 09, 2010 7:57 am
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Engine shuts off on slow down

Post by RBGERSON » Fri Aug 31, 2012 8:58 am

Sure sounds like fuel issue..slow jets clogged. Sea foam?? or spray some carb cleaner in while running? worth a shot to start with.


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Posts: 8311
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: Engine shuts off on slow down

Post by virgilmobile » Fri Aug 31, 2012 9:53 am

The noise you hear is normal,the carb control module is opening and closing valves at 1500,2500 and 3000 rpm.a dying bike,usually is fuel associated,although on the 1500 there are suspect vacuum line problems.Normally found at the sharp 90* bends.My 88 had 7 of them.It took a whole day to replace them.You can look at the service manual about the one shot valves and match which one opens at each rpm range

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