Lower revs when idle
Seasoned HDF Member
Joined: Dec 2009
Posts: 9,163
Likes: 1,906
From: Doghouse... mostly
LAFO, go to the upper right corner and use the search function of this forum and again in the oil section and you'll come across many threads on your question. Don't pay attention to latrobedyna if you want to keep riding your bike.
Road Warrior
Joined: Sep 2008
Posts: 1,318
Likes: 54
From: Texas Panhandle
;^^^^ Latrobedyna, finally! Someone who knows what they are talking about, and not just spreading theories they read on the Internet.
THANK YOU SIR!
THANK YOU SIR!
Last edited by Not E'nuff Harley; Jan 19, 2015 at 06:37 PM.
Tourer
Joined: May 2013
Posts: 365
Likes: 1
From: under a rock in the swamp
OMG i bet your one them guys who swear your exhaust has to have back pressure as well. Your really not sure why it needs to have it but by golly you must have it. I should learn to stay off this site. While there some good to great poster's on here there some real fruit loops too.
Last edited by latrobedyna; Jan 19, 2015 at 07:36 PM.
Thread Starter
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Cruiser
Joined: Apr 2013
Posts: 201
Likes: 2
From: Colombia
I'll go ahead and do the search, but doubt oil threads contain input on low revs. I recently read a lot of threads on oil before switching to Mobil 1 V-Twin.
I read all comments people leave on my post. I don't take any answers as wrong, just the best opinion a fellow rider and owner can offer. I will take all comments to consideration before doing anything as always. The more comments I get from everyone the more informed I am to troubleshoot problems or prevent them 👍😎
I read all comments people leave on my post. I don't take any answers as wrong, just the best opinion a fellow rider and owner can offer. I will take all comments to consideration before doing anything as always. The more comments I get from everyone the more informed I am to troubleshoot problems or prevent them 👍😎
Tourer
Joined: May 2013
Posts: 365
Likes: 1
From: under a rock in the swamp
What will drop is the charging voltage however. And the op or any one else can check all this very easy if the just stop listening to the crap that's floating around the net and simply set the RPM @ 800 let the bike idle several minutes and check both the oil pressure and the charging voltage. They will then find out what is what. LOL but don't listen to me if your want to ride long. I liked that comment i sure he too has logged well over 500K miles on his bikes over the years. and i did all that on a knuckle Shovel (gasp a AMF) and a twinky not bad i say.
Last edited by latrobedyna; Jan 19, 2015 at 07:25 PM.
Seasoned HDF Member
Joined: Dec 2009
Posts: 9,163
Likes: 1,906
From: Doghouse... mostly
Running the idle too low on rpm's will result in premature bearing and compensator failure as the sumping mechanics of the Twincam engine cannot provide enough oil pressure to lubricate and remove heat build up on internal components of the motor. And yes the stator on the twin cams will not provide enough charging to the system to give the energy required to constantly pressurize the fuel pump. Haven't logged over 500 K on my bikes but I'm right there @ 200.
Road Master
Joined: Dec 2012
Posts: 848
Likes: 30
From: CO
Generally speaking, I avoid taking advice from people who say "OMG" and can barely speak proper English.
Having said that, I do think that electrical charging is the biggest issue with the EFI TCs. However, every bit of literature from the Moco says VERY specifically that TCs will not oil properly below 900rpms. So just keep it above 900 and you should be fine. And honestly, unless you do cams, your stock TC isn't going to sound like an EVO no matter how low the rpms.
Having said that, I do think that electrical charging is the biggest issue with the EFI TCs. However, every bit of literature from the Moco says VERY specifically that TCs will not oil properly below 900rpms. So just keep it above 900 and you should be fine. And honestly, unless you do cams, your stock TC isn't going to sound like an EVO no matter how low the rpms.
Road Master
Joined: Dec 2012
Posts: 848
Likes: 30
From: CO
One thing I recently learned going to the Harley museum in Milwaukee is that ALL of the earliest Harleys had VERY pinched off exhausts. All those F-heads, flatheads...you name it in the early 1900s, pretty much all came stock with 2 into 1 exhausts with very closed-off ends. And this had nothing to do with noise or emissions regulations, it was because all those *stupid* engineers knew that in order to develop good torque, you can't have a fat, wide-open exhaust. That **** started much later, mostly by guys who wanted to make a lot of noise. I'm not sure why I'm even telling you all of this though, cuz you obviously know better.
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Tourer
Joined: May 2013
Posts: 365
Likes: 1
From: under a rock in the swamp
Because of this statement alone, you truly are an idiot.
One thing I recently learned going to the Harley museum in Milwaukee is that ALL of the earliest Harleys had VERY pinched off exhausts. All those F-heads, flatheads...you name it in the early 1900s, pretty much all came stock with 2 into 1 exhausts with very closed-off ends. And this had nothing to do with noise or emissions regulations, it was because all those *stupid* engineers knew that in order to develop good torque, you can't have a fat, wide-open exhaust. That **** started much later, mostly by guys who wanted to make a lot of noise. I'm not sure why I'm even telling you all of this though, cuz you obviously know better.
One thing I recently learned going to the Harley museum in Milwaukee is that ALL of the earliest Harleys had VERY pinched off exhausts. All those F-heads, flatheads...you name it in the early 1900s, pretty much all came stock with 2 into 1 exhausts with very closed-off ends. And this had nothing to do with noise or emissions regulations, it was because all those *stupid* engineers knew that in order to develop good torque, you can't have a fat, wide-open exhaust. That **** started much later, mostly by guys who wanted to make a lot of noise. I'm not sure why I'm even telling you all of this though, cuz you obviously know better.
Last edited by latrobedyna; Jan 20, 2015 at 01:13 AM.
