Valve replacement???


Information and questions on GL1500 Goldwings (1988-2000)
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Breyno
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Joined: Tue Oct 11, 2011 4:47 am
Location: Australia
Motorcycle: 1993 GL1500 Aspencade
2010 DL650 Vstrom (sold)
2015 KLX 250s

Valve replacement???

Post by Breyno »



Hi all,

On a recent ride a mate told me I needed to change the valves out on any 93 GL1500. He said he could hear it backfiring as I was coming off the gas, and there was a small puff of smoke around the same time. I can't say I have seen the smoke, but I have heard some small backfire type noise which hasn't really bothered me until he said that.

Otherwise the old girl runs like a dream. I'm not concerned(or should I be).


Rodzim
Posts: 81
Joined: Sun Oct 07, 2018 1:24 pm
Location: Smyrna, ga
Motorcycle: 1994 gl1500 se

Re: Valve replacement???

Post by Rodzim »

Backfires on deceleration is not a symptom of a bad valve, more than likely your idle air mixture is a tad rich. The backfiring you are hearing is raw gas hitting a smoldering hot exhaust manifold.
A bad valve will give you a misfire all the time and low power.
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WingAdmin
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Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: Valve replacement???

Post by WingAdmin »

If you really want to know, you can do a wet/dry compression/leakdown test that will tell you for sure if you've got valve issues. But I agree, this is far more likely due to fuel/air mixture and valve problems. GL1500's rarely have issues with their valves.
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