Throttle surge at startup? - Kawasaki Vulcan Forum : Vulcan Forums
 
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post #1 of 8 (permalink) Old 05-05-2019, 07:03 PM Thread Starter
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Throttle surge at startup?

My wife has a 2017 900. We notice that every time she starts the bike, it has a throttle surge/reva high fir a couple seconds and then drops to a nice idle. Anyone else have yhis happen? Is it pretty commin wiyh this bike?
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post #2 of 8 (permalink) Old 05-05-2019, 07:56 PM
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Normal operation. The computer moves the throttle plate when it starts so it won't stall.

Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting
"WHAT A RIDE!"
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post #3 of 8 (permalink) Old 05-06-2019, 06:57 AM
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My 2014 900 does the same thing. Normal.
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post #4 of 8 (permalink) Old 05-06-2019, 10:33 AM
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Same thing with my 2012 900.
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post #5 of 8 (permalink) Old 05-06-2019, 06:43 PM
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Same my '09. I think of it as a "wake up."
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post #6 of 8 (permalink) Old 05-07-2019, 08:49 PM
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My 2013 900, also normal.
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post #7 of 8 (permalink) Old 05-08-2019, 04:11 AM
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Quote:
Originally Posted by Twitchrope View Post
My wife has a 2017 900. We notice that every time she starts the bike, it has a throttle surge/reva high fir a couple seconds and then drops to a nice idle. Anyone else have yhis happen? Is it pretty commin wiyh this bike?

This is a "900 sticky" topic

https://www.vulcanforums.com/forums/...fast-idle.html
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post #8 of 8 (permalink) Old 05-13-2019, 04:14 PM
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Hi @Twitchrope ,

I've noticed that the surge happens more often and for a longer duration when the battery is not fully charged -or can't hold the charge between the rides (ageing battery). As I recall, when I followed this phenomenon on my Vulcan 900, a battery below 12.5V (resting/no load) always results in a surge and high idle. I interpreted that as a ECU setting from factory to both keep the engine running and also 'fast charge' the battery till nominal voltage is detected...
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