Lowest Idle RPM?

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Jan 20, 2011 | 01:50 AM

#21

emwolb

Ultimate HDF Member

Joined: Aug 2008

Posts: 5,413

Likes: 17

From: eastern oklahoma

your bike will never get that old harley sound. i have an evo in another bike and they have that genuine harley sound that we all remember. the pans and shovels also rock in that respect.

Jan 20, 2011 | 04:33 AM

#22

Mike

Ultimate HDF Member

Joined: Jun 2009

Posts: 6,786

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From: Centralia, Wa

Not a whole lot you can do with a stock fuel injected twin cam motor to get the lumpy Harley idle. Bolt a set of SE204 cams and a 2-2 exhaust and you'll get a little closer to the sound, but it won't be as nasty as a shovel or even a carbureted evo.

Jan 20, 2011 | 08:48 AM

#23

grbrown

Club Member

Joined: Jun 2007

Posts: 45,429

Likes: 2,898

From: Bedford UK

Quote:

Originally Posted by inverse121

If you want that real harley sound, forgo $5000 in upgrades to you street glide and buy your self a nice shovelhead.

That's the solution!

On later engines, including evos, the correct tick-over is around 1,000rpm. Book may vary a little away from that. Oil pressure may be a consideration, but another is crankshaft speed. The slower the tacho speed, the more the rotational speed varies, with the crank slowing as it reaches each compression cycle, then accelerating after each. Not good for bearings etc!

So keep tickover where it belongs! Shovels can cope with a slower tick-over because they have heavier flywheels, to keep things smoooooth.

Jan 20, 2011 | 09:00 AM

#24

vickers1

Road Warrior

Joined: Jun 2006

Posts: 1,993

Likes: 20

From: Southeast GA

So if 900 RPM is the slowest safe RPM, then how would one get the idle RPM slowed to 900?

Jan 20, 2011 | 09:04 AM

#25

shore

Stellar HDF Member

Joined: Oct 2010

Posts: 2,589

Likes: 98

From: Port Orange, Fl

are we going by the famously inaccurate harley gauges? lol

I swear my 07 shows 1100+ cold idle and well under 1000 hot idle at time. Oddly enough, it sounds fine. I highly doubt it is 800rpms like I think I've seen.

I'll have to pay more attention to it now, thx alot....lol