throttle response


Information and questions on GL1500 Goldwings (1988-2000)
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fibersport
Posts: 63
Joined: Sun Sep 03, 2017 11:08 pm
Location: Valparaiso, IN
Motorcycle: 1990 Goldwing 1500
2002 Honda Shadow VLX Deluxe

throttle response

Post by fibersport » Sat Oct 06, 2018 9:11 pm



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: 1980 GL-1100 STD Vetter (2005-)
1993 GL-1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
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1972 CL-350 (1980-1988) sold
1978 Suzuki GS-550 (1985-2005) sold
1977 GL-1000 (2002-2006) sold

Re: throttle response

Post by DenverWinger » Sun Oct 07, 2018 8:52 am

I'd say if the RPM's fall off quickly to the correct idle RPM (no stalling) you are fine.
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fibersport
Posts: 63
Joined: Sun Sep 03, 2017 11:08 pm
Location: Valparaiso, IN
Motorcycle: 1990 Goldwing 1500
2002 Honda Shadow VLX Deluxe

Re: throttle response

Post by fibersport » Sun Oct 07, 2018 10:07 am

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
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Motorcycle: 2000 GL1500SE Candy Spectra Red
1994 GL1500SE Pearl Bermuda Green

Re: throttle response

Post by bellboy40 » Sun Oct 07, 2018 3:03 pm

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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Re: throttle response

Post by ct1500 » Sun Oct 07, 2018 3:49 pm

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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