Plastic clots cylinder block

Hi,

Please see attached picture, what is the function behind these plastic clots and do I need to replace the one is not 100% good?

Thank you.

Anti vibration dampers, for noise attenuation on the cooling fins, older two strokes with big fins often had that ringing sound..

They do crop up nos sometimes -yes I'd replace it.

I wonder if rtv could be substituted?

Maybe use high temperature silicone rubber plugs? guessing those are 10mm.

KAWASAKI KZ DAMPER PLUG OEM NOS PT# 92066-1016 OM7 --- OEM

(50) 1/4" x 3/8" High Temp Silicone Rubber Plugs Powder Coat Coating Paint Mask ... 3/8" = 10mm

16pc High Temp Silicone Rubber Tapered Plug Kit Powder Coating Paint Masking Set --- Assortment ....various sizes

Thank you, there are 6 in total?

www.partzilla.com/catalog/kawasaki/motor...-pistons-kz750-h2-h3

I don't have access to the block now, so that is my reason for my question

Apparently. 6 damper plugs are listed at Kawasaki.com for the 750-E2.

www.kawasaki.com/Parts/PartsDiagram/134869/1981/KZ750-E2

No eBay APP ID and/or Cert ID defined in Kunena configuration

martin_csr wrote: Maybe use high temperature silicone rubber plugs? guessing those are 10mm.

KAWASAKI KZ DAMPER PLUG OEM NOS PT# 92066-1016 OM7 --- OEM

(50) 1/4" x 3/8" High Temp Silicone Rubber Plugs Powder Coat Coating Paint Mask ... 3/8" = 10mm

16pc High Temp Silicone Rubber Tapered Plug Kit Powder Coating Paint Masking Set --- Assortment ....
various sizes

So these shall be better and cheaper?
Must I cut them or something, they must be flat the same way the original (even with the alu surface) ?

Those rubber plugs are dampers and as such, the hardness and damping properties of the rubber affect their use. If you use something softer/harder it will change how they function. Doubt it matters a whole lot though. I forgot to install them back when rebuilding my 750 and if they make a difference, I can't notice.

hehe okey

Everything cost money, so If I can save something..... heh
WIll you asked the yellow one on ebay ?

I have never put them back in any motor that I have put back together since way back in 1976!!!

The purists will say you have to use them. I never noticed any difference in my motors without them!!!

Gordone, before reading this, read comment by Dr. Gamma. hee.

I have no idea if the silicone plugs would work the same as stock. See reply by Nessism.
I don't know if they would fit. The taper may not be correct. I don't know. I would compare them to a new oem plug.
If the taper is correct, you might have to trim or cut them. no big deal. I would use a sharp razor blade.
Since Dr. Gamma says they aren't really needed, I would probably use the silicone plugs. assuming oem are too expensive or unavailable.
Or just fill the holes with high temp rtv as TexasKZ said.

My ZX750A1 (GPZ750) motor does not have them.