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CVO Technical => Twin Cam => Topic started by: Johnchev89 on June 05, 2018, 01:37:20 PM

Title: Another box of rocks.
Post by: Johnchev89 on June 05, 2018, 01:37:20 PM

So....
Just bought a 2012 cvo softail. Only 10,000 miles. 
When engine is cold it sounds good nice and quiet, take off and ride for twenty minutes or so and it gets noisy .
Is quiet at idle but take off in first up thru 2nd and third or so up to about 2500 rpm it has a rattle or knock.
It tones down some up in the rpm range.
In neutral I can rev it and no noise...
Almost sick to my stomach that I may be going into the motor already.
I have new lifters and rocker lockers on the way.
Am I looking at possible piston slap or worse?

Title: Re: Another box of rocks.
Post by: J.D. on June 05, 2018, 01:42:28 PM

Also check compensator.

Title: Re: Another box of rocks.
Post by: Johnchev89 on June 05, 2018, 02:39:57 PM

Most definitely.   Already planned to upgrade that.

Title: Re: Another box of rocks.
Post by: J.D. on June 05, 2018, 02:45:46 PM

Piston slap usually happens when cold.  I wouldn't be concerned with that.

Might also want to upgrade the inner camshaft bearings.

Title: Re: Another box of rocks.
Post by: Johnchev89 on June 05, 2018, 02:50:59 PM

Also on the way.   Thanks

Title: Re: Another box of rocks.
Post by: MCE on June 05, 2018, 03:50:50 PM

Compensator is where I'd put my bet.

Title: Re: Another box of rocks.
Post by: HD Street Performance on June 05, 2018, 05:05:43 PM

Lifters get the blame as do the valve springs. Truth be told the cam has very fast ramps. The springs have a harmonic right there and this causes lash, loft. Hard as heck on the roller bearings on any lifter. With a cam change it gets quiet with most. Still hard on lifters but not as bad. Lower spring pressure helps, not beehives, they have more pressure on the seat than stock. Some of the cams have a lot more sensible ramps.

Title: Re: Another box of rocks.
Post by: Johnchev89 on June 05, 2018, 05:36:58 PM

I'm gonna do the lifters, cam bearings, and rocker lockers.
Then go from there.   
The compensator has some wear on the ramps. More polished than chewed up.   Was a little bit of metal on the drain plug .  Dealer had syn3 in all 3 holes. Put regular formula plus back in. And 75w90 in the trans.

Title: Re: Another box of rocks.
Post by: Scott7d on June 06, 2018, 07:58:48 AM

Sounds like the classic signs of my previous compensator issues, getting worse when hot, etc. My noise however was the worst when sitting at idle, and you said yours was quiet at idle.

I took a trip last month to Eureka Springs with 5 other bikes. Of the 6 bikes, 3 had rattling compensators. Pretty sad.

Title: Re: Another box of rocks.
Post by: Johnchev89 on June 06, 2018, 09:38:57 PM

Well    pulled the lifter and cams.   Slight wear on the rear intake lobe and lifter roller.
Checked crank runout on pinion.   
.0045   

Title: Re: Another box of rocks.
Post by: Johnchev89 on June 11, 2018, 08:03:46 PM

Installed s&s standard lifters, b168 bearings, rocker lockers.
Engine is noticeably quieter.
Plan to upgrade the compensator later.   Just gonna ride and put some miles on it.