Lowering the idle. - Harley Davidson Street Forum - Street 500 and 750
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post #1 of 8 Old 06-03-2015, 09:10 AM Thread Starter
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Lowering the idle.

So I was curious if anyone has done it or might have input on this, but I have the fuel pack from V&H, and i'd like to drop the idle a bit on the bike. Currently idles somewhere around 1350RPMs. I know on some sports bike the the RPMS have to be at a certain level so the oil pump keeps pumping sufficiently, not sure if these little V-twins are the same. I'd like to drop it somewhere around 1000, just so it KINDA sounds like a real Harley you know?

Thanks in advance.
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post #2 of 8 Old 06-04-2015, 12:22 AM
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I think the bike sounds better, more refined than other Harleys (air cooled) but if you want it louder and deeper sounding just get an aftermarket slip on exhaust. Screaming eagle is what I went with but there are a few out there to choose from.
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post #3 of 8 Old 06-04-2015, 05:21 PM Thread Starter
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I'm content with the sound (pulled the baffling) I was wonder if anyone knew of adverse effects on dropping the idle 400-500RPMS. Want more of a chug sound at idle.
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post #4 of 8 Old 06-04-2015, 07:23 PM
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The idle speed is not adjustable on the Streets.

Harley-Davidson Service Advisor
Street 500/750 Safety Recalls/Product Programs/Non-Compliance Recalls:
-2015 HARLEY-DAVIDSON STREET FUEL TANK - SAFETY RECALL 0161
-2015 STREET LICENSE PLATE REFLECTOR REGULATORY NON-COMPLIANCE RECALL CODE 0620
-PRODUCT PROGRAM 0919: 2015 STREET MODELS RIGHT SIDE RIDER FOOT CONTROL MOUNTING SCREWS
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post #5 of 8 Old 06-05-2015, 11:45 AM
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Quote:
Originally Posted by HDServiceAdvisor View Post
The idle speed is not adjustable on the Streets.
OP notes that he does have a V&H FP3, which will allow you to change the idle speed through through an entire range of engine temperatures. V&H notes in app that 900 rpm is the minimum speed to have adequate oil pressure.

My V&H CO Slip On, No Baffle, Hi-Flow filter shows an operating idle of 1504 up to 150 degrees F, then drops down to 1200 as the engine temp rises.

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post #6 of 8 Old 06-06-2015, 09:42 AM
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Quote:
Originally Posted by HDServiceAdvisor View Post
The idle speed is not adjustable on the Streets.
I thought you could do anything, with the proper programmer, a little knowledge and a laptop?

Some days I like to go fast and other days I like to try stupid things on my bikes.

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post #7 of 8 Old 06-08-2015, 09:57 AM Thread Starter
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Quote:
Originally Posted by HowlOnWheels View Post
OP notes that he does have a V&H FP3, which will allow you to change the idle speed through through an entire range of engine temperatures. V&H notes in app that 900 rpm is the minimum speed to have adequate oil pressure.

My V&H CO Slip On, No Baffle, Hi-Flow filter shows an operating idle of 1504 up to 150 degrees F, then drops down to 1200 as the engine temp rises.
Ahh I see thank you, mine drops about to the same although I might drop the idle a tad when its cold, seems if I don't let it idle long enough it idles really high when I ride. When I cut throttle to shift, its like I never let off the throttle at all, stays at a high RPM.
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post #8 of 8 Old 06-12-2015, 03:59 AM
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I use V&H Competition with baffle, Hi-Flow filter, and FP3. Sounds really fascinating.
I lowered to 1,000 at high temperature, but it was a bit too unstable.
Then I adjusted to 1,050. Idling makes a bit irregular but fairly stable beats.
No problem for 1 month ride.
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