Lousy idle on VStar 1300 - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
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post #1 of 3 (permalink) Old 05-07-2019, 06:15 AM Thread Starter
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Location: Cairns QLD Australia
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Lousy idle on VStar 1300

Idle varies between 1000rpm to 1400 rpm. TPS is spot on as are other variable settings. Cables aren’t dragging, yet idle flares particularly when pulling up at lights. A quick rev normally sets the idle to “normal”.
Giving me the willies so any positive input may help.
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post #2 of 3 (permalink) Old 05-07-2019, 07:03 AM
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Location: Houston, Texas
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Sounds like a vacuum leak. I spray brake cleaner around intake area to isolate leak. If idle increases with brake cleaner then the leak is close.

Surging idle causes:

If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator), restricted fuel injectors, a vacuum leak or really anything that throws off the fuel mixture going in to the engine, this can cause the surge.

2001 Vstar 1100 Classic (sold), Cobra Slash Cut full exhaust, Dropped 1 inch with lowering links, ORK, 4.5 inch handlebar risers, Ultimate passenger seat, Passenger pegs moved forward 4 inches, Handlebar clock, KN air filter, Viking saddlebags, Additional rear lighting
Loose nut "me" behind the bars
2006 Harley Electra Glide Ultra Classic

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post #3 of 3 (permalink) Old 05-07-2019, 07:42 AM
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stop at Walmart on the way home and get a can of SeaFoam or another fuel additive carb/injector cleaner

might fix it, cant hurt anything, and its only $8

BTW, have to say it: read the directions, 16 ounce can is good for 3 or 4 tanks of gas on a motorcycle.

Last edited by KCW; 05-07-2019 at 08:05 AM.
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