Topic: Ceramic inserts

[nitrofish1]

Hi all. Quick question(s). There are several ceramic inserts in between the cylinder fins on the portion of the top end containing the cylinder sleeves. Is there supposed to be one in between each fin? Mine seems to have 2, then a space, then 1, then a space, then 2 ceramic pieces. Also how are these held in place? I see that there is a small hole in the fins that goes through the inserts but there's no bolt or anything appearing to hold them in place, or is there a lip that they sit on?

[bwaller]

Originally there were vibration dampers and are a rubber type material. Obviously they harden with heat/age.

[MCRider]

The inserts have a pointy nipple on each side which pops into the holes of the fins and holds the inserts in place. You can pry them out, folding over the nipples and allowing them to move. You'd likely rip or pop the nipples off rendering them useless.

There are only as many as there are holes to hold them.

IF they are already gone, don't worry, unless you can surce some from  trashed engiine.

[bollingball]

Have you ever heard a real hot motor when you shut it off you hear a lot of ticking as it cools down. That is what they are for it stops most of that ticking sound.
Ken

[MCRider]

Have you ever heard a real hot motor when you shut it off you hear a lot of ticking as it cools down. That is what they are for it stops most of that ticking sound.
Ken

I've also heard that they dampen harmonic vibration while running at speed, which can be noisy and possibly contribute to fin cracking. But I don't know this first hand.

[nitrofish1]

Originally there were vibration dampers and are a rubber type material. Obviously they harden with heat/age.

Weird, they seemed like ceramic to me, they were white and looked chalky, but i suppose i havent tried removing them either so I couldnt tell if they were ceramic or rubber.

Is it not possible to order these? Or by the responses I assume that they are not necessary? Kind of weird that they want vibration dampening in between the fins when the fins do not contact each other nor seal.

[nitrofish1]

Looks like you can order them. 3.44ea at a qty of 20 

[MCRider]

Originally there were vibration dampers and are a rubber type material. Obviously they harden with heat/age.

Weird, they seemed like ceramic to me, they were white and looked chalky, but i suppose i havent tried removing them either so I couldnt tell if they were ceramic or rubber.

Is it not possible to order these? Or by the responses I assume that they are not necessary? Kind of weird that they want vibration dampening in between the fins when the fins do not contact each other nor seal.

As I mentioned the fins set up a harmonic resonance. The core vibration of the engine sets each fin to buzzing independent of each other. This is noisy and in the extreme can cause damage. By connnecting the fins together with rubber bumpers this vibration can be damped out.

Never known a fin to actually crack from this. But on a touring bike with a Windjammer fairing, it can add to overall background noise which Honda was trying to decrease.

[nitrofish1]

Originally there were vibration dampers and are a rubber type material. Obviously they harden with heat/age.

Weird, they seemed like ceramic to me, they were white and looked chalky, but i suppose i havent tried removing them either so I couldnt tell if they were ceramic or rubber.

Is it not possible to order these? Or by the responses I assume that they are not necessary? Kind of weird that they want vibration dampening in between the fins when the fins do not contact each other nor seal.

As I mentioned the fins set up a harmonic resonance. The core vibration of the engine sets each fin to buzzing independent of each other. This is noisy and in the extreme can cause damage. By connnecting the fins together with rubber bumpers this vibration can be damped out.

Never known a fin to actually crack from this. But on a touring bike with a Windjammer fairing, it can add to overall background noise which Honda was trying to decrease.

Whenever I look at at an old bike in a showroom with the Windjammer fairing, I just imagine it without it, because if I did purchase said bike, that would be the first thing I'd remove, I have an ungodly hate for the things, do not like the way they look 

I've experienced harmonic vibration before in a car with a broken exhaust system, whenever the car hit second gear, the noise was at a point where even if you yelled you could not hear the other person, the noise was not loud but for some reason it just canceled at all other noise, only once the car hit third gear could you resume a conversation.

Looks like I'll be purchasing these dampening parts then if they could prevent my ride from possibly breaking itself apart.