throttle response


Information and questions on GL1500 Goldwings (1988-2000)
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fibersport
Posts: 114
Joined: Sun Sep 03, 2017 11:08 pm
Location: Valparaiso, IN
Motorcycle: 2001 Goldwing 1800
1990 Goldwing 1500
2002 Honda Shadow VLX Deluxe - sold
1986 Rebel - sold
1972 Trail 70 (still have it!)

throttle response

Post by fibersport »



I just buttoned up my bike from fixing a vacuum leak and went for a short ride. I noticed that when I close the throttle coming to a stop or shifting gears, it seems to drop rpm's much quicker than before. I'm sure I have been dealing with some vacuum leak for a long time so I could see that this is the way it should run, or I wonder if I didn't connect something. In any case, can someone tell me what their throttle response is when closing the throttle - does it drop quickly or does it lag?



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DenverWinger
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Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: throttle response

Post by DenverWinger »

I'd say if the RPM's fall off quickly to the correct idle RPM (no stalling) you are fine.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
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fibersport
Posts: 114
Joined: Sun Sep 03, 2017 11:08 pm
Location: Valparaiso, IN
Motorcycle: 2001 Goldwing 1800
1990 Goldwing 1500
2002 Honda Shadow VLX Deluxe - sold
1986 Rebel - sold
1972 Trail 70 (still have it!)

Re: throttle response

Post by fibersport »

Took it for a ride to church this morning with no problems. My guess is that it's supposed to be this way, as you say DenverWinger, it drops to the idle rpm and does not stall so it must be right. It does idle a tad different than before so I do believe the leak has been progressive since I bought the bike last year. Now to open it up again and fix the darn coolant leak at the carb?

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bellboy40
Posts: 753
Joined: Fri Nov 27, 2009 1:13 pm
Location: Brewton, AL
Motorcycle: 2000 GL1500SE Candy Spectra Red

Re: throttle response

Post by bellboy40 »

It sounds like your bike is running like it should. Mine drops rpm quickly when releasing the throttle. If I am riding down the road with the cruise control set and then disable it by pulling in slightly on the clutch lever, it slows instantly.
Ouch, too bad about the coolant leak on the carbs. Those hoses are hard to get on and off due to the confined space to get to them. Good luck on your next adventure with them.

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ct1500
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Motorcycle: 1988 GL1500
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Re: throttle response

Post by ct1500 »

The shot air system (yellow coded vacuum hoses) is a driveability feature that aids in slowing very fast RPM drops while underway. If during shifting or slowing the engine RPM seems to drop like a rock or is tossing your body weight forward during these times it is likely not working as intended and should be investigated further following the shop manual procedure.


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