A new racket
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Seasoned HDF Member
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From: Granville New York
A new racket
My bike has picked up a new and pretty loud top end noise. I hope its just a bad bushing.I'm going to pull the rocker covers and I wanted to purchase in new bushings and bolts and rods that the rockers ride on and rock outs. Now I've ordered all the stuff and now I've found out that the new bushings will need to be sized after being pressed in. So my question is does anybody know if the new rocker arm that you can buy comes with the bushing already sized or will they need to be reamed too? It's either 160 for a new rockers or 200 for a reamer...I'd save time and money getting new rockers if they came ready to go...any help will be appreciated
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Seasoned HDF Member
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From: Granville New York
Thanks for the reply...there's 33k on the bike now I picked it up with 26k on it in march. It's in nice shape and doesn't use hardly any oil between oil changes so I'll assume the po took pretty good care of it. It is an 08 cvo rk so I know they make a little more noise than most but this is recent so I'm a little concerned. How about the possibility of a broken or loose valve guide? It starts out with the normal twin cam noise but as,soon as it starts to warm up it starts clanking...I've recently changed out lifters with s and s and there were screaming eagle adjustables in there already. I've adjusted and readjusted the pushrods 4 times at different preloads trying to see if that helps but it didn't change at all. The bike runs perfect with no loss of power at all ,any other ideas??? Thanks
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From: poway
Thanks for the reply...there's 33k on the bike now I picked it up with 26k on it in march. It's in nice shape and doesn't use hardly any oil between oil changes so I'll assume the po took pretty good care of it. It is an 08 cvo rk so I know they make a little more noise than most but this is recent so I'm a little concerned. How about the possibility of a broken or loose valve guide? It starts out with the normal twin cam noise but as,soon as it starts to warm up it starts clanking...I've recently changed out lifters with s and s and there were screaming eagle adjustables in there already. I've adjusted and readjusted the pushrods 4 times at different preloads trying to see if that helps but it didn't change at all. The bike runs perfect with no loss of power at all ,any other ideas??? Thanks
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You might check with a local dealer or indy & see if they can ream the bushings for you. But, as Max says the chances of them being worn enough to need replacing is pretty slim. The factory max clearance spec is .0035.... not real precise in the first place.
And thanks
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And thanks
__________________________________________________ ____
For ROCKOUT information & purchasing please click HERE For all Twin Cams and Evo Big Twins & Sportsters
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Also on amazon.com...
Imitated, never equaled... ROCKOUTS!
Thread Starter
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Seasoned HDF Member
Joined: Jun 2017
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From: Granville New York
You might check with a local dealer or indy & see if they can ream the bushings for you. But, as Max says the chances of them being worn enough to need replacing is pretty slim. The factory max clearance spec is .0035.... not real precise in the first place.
And thanks
__________________________________________________ ____
For ROCKOUT information & purchasing please click HERE For all Twin Cams and Evo Big Twins & Sportsters
And thanks
__________________________________________________ ____
For ROCKOUT information & purchasing please click HERE For all Twin Cams and Evo Big Twins & Sportsters
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Seasoned HDF Member
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From: Granville New York
The CVO RK is a 110 with 110 heads. If so, I'd probably swap the valve springs out with something lighter and use SnS premium lifters. I myself have not had good luck running SnS regulars. They lasted about 3000 miles before the valve strain started to rattle when hot(running H290 cam and 175 lb springs).. I was getting 10-15k out of the Comp cams 875s..
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From: poway
swapped out lifters...no change ...readjusted pushrods another half turn out...no change...pulled rockers and checked them out...one bolt showed some witness markings so I put in the rockouts, new breathers and gaskets all around and put it back together and no change. I did notice that the oil that was laying around in the front rocker area looked new...like fresh from the bottle new and when I tipped the front locker assembly on its side note oil came out of it...when I did the rear one quite a bit came out...enough that I needed a rag to wipe it off so I could put the rockouts in. Could I be oil starved on the front top end? What would be the cause??? I have oil at the lifters and the pushrods were clear inside. Could it be the pressure relief is stuck??? Help!!!
If you are getting clean oil out of the rockers on disassembly, you are getting enough oil to the top end. Too little oil won't make noise. It will stick a valve and you'll hear that..
So the motor is reasonably quiet on startup but starts to tap after some miles.. You are sure it's a valve tap??
Low oil pressure could be an issue so it's with checking..
If it's a distinctive tap you should be able to find the valve with a stethoscope. Sound should be pretty clearly at the left side motor, 2-3 inches in front of or behind the spark plug.
Is the sound consistent at RPM or load based. Does it change with throttle (when rpm sort of constant) or RPM?
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Thread Starter
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Seasoned HDF Member
Joined: Jun 2017
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From: Granville New York
If you are getting clean oil out of the rockers on disassembly, you are getting enough oil to the top end. Too little oil won't make noise. It will stick a valve and you'll hear that..
So the motor is reasonably quiet on startup but starts to tap after some miles.. You are sure it's a valve tap??
Low oil pressure could be an issue so it's with checking..
If it's a distinctive tap you should be able to find the valve with a stethoscope. Sound should be pretty clearly at the left side motor, 2-3 inches in front of or behind the spark plug.
Is the sound consistent at RPM or load based. Does it change with throttle (when rpm sort of constant) or RPM?
So the motor is reasonably quiet on startup but starts to tap after some miles.. You are sure it's a valve tap??
Low oil pressure could be an issue so it's with checking..
If it's a distinctive tap you should be able to find the valve with a stethoscope. Sound should be pretty clearly at the left side motor, 2-3 inches in front of or behind the spark plug.
Is the sound consistent at RPM or load based. Does it change with throttle (when rpm sort of constant) or RPM?
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From: poway
I had oil pour out of the rear rocker assembly when I tipped it in its side...it looked the same as what's on the dipstick and what was laying on lower rocker box area...I have about 700 miles on the oil (redline), so it should look a little dirty. The front assembly when I tipped it on its side nothing came out...it was dry but definitely not like the other one and the oil laying in the lower rocker area was clean...like it stopped circulating shortly after I changed it...which is about the time this new noise showed up...probably 2 weeks after I changed the oil. I took it to my indy and he listened to it and suggested another half turn on the pushrods which I did the next morning but it made no difference. He didn't think it sounded like it was coming apart but had nothing to say other to readjust the pushrods. It starts with the normal twin cam sounds but about a minute or two of running it starts with the noise and it goes up and down with rpm's...load or no load it's there. Thanks for replying, I really appreciate it
Well based on what you are saying, I'd try s different oil.. One thing to note is that automotive lifters will deliver less oil to the top end.. If your indy seems to think that the noise is not excessive, I probably wouldn't worry about it.. It's real hard to diagnose lifter tick over the network.. My criteria for lifter being OK is if when you start the bike up and let it idle, the motor is quiet, it's pretty much OK.. A bit of a rattle at idle of slight noise going down the road when hot is fine.. Most of the stuff I have has higher lift cams and roller rockers tho.. The Stage 2 M8 RK, I have, rattles a bit pretty much all the time.. Being an air cooled motor with lots of fins any internal noise makes it's way outside pretty easy..