more spark plug ???


Information and questions on GL1100 Goldwings (1980-1983)
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aznyaz
Posts: 245
Joined: Sun Jul 29, 2012 12:36 pm
Location: Knoxville, Tennessee
Motorcycle: 1981 GL1100I

more spark plug ???

Postby aznyaz » Mon Sep 24, 2012 8:45 pm



OK, my bike is an 81 GL1100I and the spark plugs should be NGK DR8ES-L but they're NGK DPR8EA-9 which are specified for an 82 GL1100I. First, do these plugs have any great impact on performance, etc. and why can't I get a 5/8" plug socket on them. The DR8ES-L has a 5/8" hex. Why would this other plug be any different?

Any input is greatly appreciated.

MJ



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aznyaz
Posts: 245
Joined: Sun Jul 29, 2012 12:36 pm
Location: Knoxville, Tennessee
Motorcycle: 1981 GL1100I

Re: more spark plug ???

Postby aznyaz » Mon Sep 24, 2012 10:21 pm

Just answered part of my question. The DPR has requires an 11/16" or 18mm spark plug socket. I read earlier today that the DR requires a 5/8". I still need to know if there is a big difference between these plugs.

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aznyaz
Posts: 245
Joined: Sun Jul 29, 2012 12:36 pm
Location: Knoxville, Tennessee
Motorcycle: 1981 GL1100I

Re: more spark plug ???

Postby aznyaz » Mon Sep 24, 2012 10:25 pm

I was mistaken, the DR also requires an 11/16" socket.

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themainviking
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Re: more spark plug ???

Postby themainviking » Tue Sep 25, 2012 6:01 am

My guess would be that the DR is a standard plug while the DPR is a platinum. Basically the DPR is designed to last longer. What other differences there may be, I do not know, but if the bike is running fine, then the plug is a correct plug for the bike. NGK has probably four different basic designs for plugs: Standard, Platinum, Iridium and Laser Iridium (which is both platinum and iridium) Each is made to last longer than it's predecessor, with the Laser Iridium designed for 100K miles of use. [this info has been gleaned from NGKs spark plug site]
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aznyaz
Posts: 245
Joined: Sun Jul 29, 2012 12:36 pm
Location: Knoxville, Tennessee
Motorcycle: 1981 GL1100I

Re: more spark plug ???

Postby aznyaz » Tue Sep 25, 2012 1:57 pm

OK, good to know. So I don't have to rush out to replace plugs unless they're causing the sputter that I have (probably not). I would think it's carb related. The last 2 tanks with Sea Foam haven't really changed my sputter issues.

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scotterichmond
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Location: Marblemount,wa
Motorcycle: 1975 GL1000
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Re: more spark plug ???

Postby scotterichmond » Tue Sep 25, 2012 2:09 pm

the DPR8EA-9 is a little hotter , but more important is the gap. that plug is gapped at the factory @ .031-.034 and you should be @0.24-.028

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LittleGoldy
Posts: 31
Joined: Sun Jul 26, 2015 11:41 pm
Location: Lake Worth FL
Motorcycle: 1983 GL1100, 1982 GL100 Aspencade (parts bike, ugh got shafted on ebay) 1983 XJ750 Seca Sold, 2003 Kawasaki ZX1R Sold, 1980 GS750E Sold, 1973 Kawasaki H1 Triple 500 (first bike ever) Sold

Re: more spark plug ???

Postby LittleGoldy » Fri Apr 29, 2016 4:01 pm

The earlier GW's required a NGK D8ES–L Plugs. For the best information and MAYBE get your grubby little paws on some DISCONTINUED original plugs look up this little sweety: http://www.randakksblog.com/spark-plug-tricks/ :o

For additional "information" the NGK 5 Things to KNOW about spark plugs can be loaded here: http://randakksblog.com/wp-content/uplo ... points.pdf


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