rpm drop


Information and questions on GL1500 Goldwings (1988-2000)
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rick457
Posts: 50
Joined: Tue Jan 17, 2012 11:44 am
Location: Pensacola, Florida
Motorcycle: 1989 GL1500k Goldwing
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rpm drop

Postby rick457 » Sun Sep 25, 2016 10:18 pm



rpm drops when engage brake



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hugger-4641
Posts: 180
Joined: Wed May 25, 2011 1:07 pm
Location: McKenzie, TN
Motorcycle: 1994 GL1500 Aspencade, 1982 CM 200 Twinstar, 1984 VT500 Ascot

Re: rpm drop

Postby hugger-4641 » Sun Sep 25, 2016 11:31 pm

Probably need a little more information here! I'm going to assume that you mean with the bike in nuetral and engine at idle, the rpm's drop when you engage the brake. This is probably due to the electrical load from the brake lights causing the alternator to kick in. If it is happening everytime, might indicate a weak battery.

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rick457
Posts: 50
Joined: Tue Jan 17, 2012 11:44 am
Location: Pensacola, Florida
Motorcycle: 1989 GL1500k Goldwing
Contact:

Re: rpm drop

Postby rick457 » Mon Sep 26, 2016 7:43 am

Hugger, your right on all except for the battery and alternator are new. I'M like you, I think it is the stop light circuit. I'm going to pull bulbs to see what happens. Thanks

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MikeB
Posts: 1226
Joined: Fri Dec 04, 2009 12:54 pm
Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A

Re: rpm drop

Postby MikeB » Mon Sep 26, 2016 12:02 pm

If the RPM only drops slightly when you apply the brakes, it is due to the current draw of the brake lights and is pretty much normal when you have a stock alternator.
MikeB
Tacoma, WA, USA

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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: rpm drop

Postby raven41951 » Wed Sep 28, 2016 8:43 am

I had the same issue. Alternator was fine. I replaced the brake light bulbs with Cree LED "bulbs" and no more rpm drop. LEDs are available everywhere, I got mine from Amazon. Got the 1157 red.

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rick457
Posts: 50
Joined: Tue Jan 17, 2012 11:44 am
Location: Pensacola, Florida
Motorcycle: 1989 GL1500k Goldwing
Contact:

Re: rpm drop

Postby rick457 » Thu Sep 29, 2016 8:02 am

Raven: that's what i'm thinking, change bulbs to led, Thanks for imput




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