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Double Idle Speed (Read 139 times)

wolf391

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Albany OR 97321
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Double Idle Speed
07/30/13 at 12:31:14

Have a question that I hope will have a simple answer. Shocked

My bike is a 87 Ls650 and will idle at what sounds like the proper RPM (I don't have a TAC so I don't know for sure). However at times the idle will drop down to a HD type - thump thump thump. I have no idea what is causing this. Anyone know what is going on and what I can do to get rid of the problem ? Thanks for your help.

'87 LS650: custom paint, custom exhaust, otherwise stock.

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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28887 L.A. California Gender:	Re: Double Idle Speed Reply #1 - 07/30/13 at 12:37:48 betcha you got an intake leak that seals itself every once in a while.
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swedishbiker Full Member Offline SuzukiSavage.com Rocks! Posts: 119 Växjö Sweden Gender:	Re: Double Idle Speed Reply #2 - 07/30/13 at 15:50:48 Next time, take a can start spray and spray around the carb. If it changes you have a leak.
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WD Serious Thumper 2005 No Login Offline Professional "scooter trash". Posts: 5207 Rosemark TN Gender:	Re: Double Idle Speed Reply #3 - 07/31/13 at 08:46:40 WD40 is a lot safer to use than ether when leak checking... especially if the cylinder is already warmed up.
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wolf391 YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 6 Albany OR 97321 Gender:	Re: Double Idle Speed Reply #4 - 07/31/13 at 10:30:34 Thanks guys for the quick response. I will check it out. Kurt
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Digger Serious Thumper 2005 No Login Offline Ya gotta be tough to ride singles! Posts: 1604 Colorado Springs, CO Gender:	Re: Double Idle Speed Reply #5 - 08/17/13 at 17:42:05 WD wrote on 07/31/13 at 08:46:40: WD40 is a lot safer to use than ether when leak checking... especially if the cylinder is already warmed up. I think I remember reading a while back that propane was no longer used as the propellant in spray cans of WD-40. If this is true, does WD-40 still work in tracking down intake leaks?
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28887 L.A. California Gender:	Re: Double Idle Speed Reply #6 - 08/17/13 at 18:16:17 Digger wrote on 08/17/13 at 17:42:05: If this is true, does WD-40 still work in tracking down intake leaks? Yes, used it last week. but instead of vroom vroom, it goes sputter sputter was able to detect a minor leak in the oring of the throttle butterfly shaft.
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