rubber circles inbetween cooling fins??

[Prisoner6]

Ps does anyone have a closeup pic of the head from the side, complete with rubber bits? I can't find mine in the thousands of pix I have!!

Hi, James -

Here is a nice pic from the side ... hope this is what you need!

For a closer look, click on the photo for a super-sized pic ...

P.S. Do you have all 24 rubber pieces?

[James England]

Hi, James -

Here is a nice pic from the side ... hope this is what you need!

For a closer look, click on the photo for a super-sized pic ...

P.S. Do you have all 24 rubber pieces?

nice one, Marco! Thanks! Yep, I have all the bits and will now use your pic and trial and error on the sizes to get them put back.......

[James England]

All my rubber bits seem to have shrunk! Only 4 out of 24 are big enough to stay in place. All the rest are too thin, regardless of which fin I try!

Has anyone tried making their own from a rubber pipe or similar??

[motoman]

All my rubber bits seem to have shrunk! Only 4 out of 24 are big enough to stay in place. All the rest are too thin, regardless of which fin I try!

Has anyone tried making their own from a rubber pipe or similar??

James......go back and read my post #25(not lazy, just PITA using my Droid while here in Georgia and not home on puter).

[James England]

James......go back and read my post #25(not lazy, just PITA using my Droid while here in Georgia and not home on puter).

I missed that but what does "passenger car tire chain rubber Tighteners " actually mean? Do you mean some sort of strap that is used to hold snow chains on? And what's a "passenger car"? ( I know about the passenger pigeon...)

[motoman]

The rubber snubbers that hold the chains tight. They are a continuous rubber loop with crimped onto the loop hooks that are stretched to outer portion of chain and hooked in approx. 5-7 locations on outer chain.........if still confused....guess you could Google tire chains and their associated hardware.........anyway, thought using snipped off pieces of them would at least get the imagination going to resolve the rubber replacement issue .......BTW, anyone interested.....that DOES work........and they ARE still available from MotherYammy......come on a pull-off tab...........an doing this on a smart phone sucks!.........hope that was clear as mud James.

[James England]

Solution, I think

I reckon Viton cord, available on eBay, will do it. It's available in 10mm diameter, in black, and takes approx 200 degrees C. It's about $20 a metre though.

http://www.ebay.co.uk/itm/370902314457?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D370902314457%26_rdc%3D1

Nitrile cord is half the price but only takes up to 100 degrees C, apparently. Does the head temperature exceed that, does anyone know?

[James England]

The rubber snubbers that hold the chains tight. They are a continuous rubber loop with crimped onto the loop hooks that are stretched to outer portion of chain and hooked in approx. 5-7 locations on outer chain.........if still confused....guess you could Google tire chains and their associated hardware.........anyway, thought using snipped off pieces of them would at least get the imagination going to resolve the rubber replacement issue .......BTW, anyone interested.....that DOES work........and they ARE still available from MotherYammy......come on a pull-off tab...........an doing this on a smart phone sucks!.........hope that was clear as mud James.

Thanks! I get the picture and appreciate your efforts with the phone!

[Prisoner6]

I reckon Viton cord, available on eBay, will do it. It's available in 10mm diameter, in black, and takes approx 200 degrees C. It's about $20 a metre though.

http://www.ebay.co.uk/itm/370902314457?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D370902314457%26_rdc%3D1

Nitrile cord is half the price but only takes up to 100 degrees C, apparently. Does the head temperature exceed that, does anyone know?

James,

Riding in a parade, or in a traffic jam on a very hot day (95-100*F), those cylinder head temps could likely see close to 400*F (just over 204*C).

Granted, that's an extreme scenario, but here in Phoenix we have those kinds of temps, and even well beyond (115-120*F)!!

But under normal conditions, I would think the cylinder head temps would be in the 200-250*F (roughly 93-121*C) range ...

And the inner two cylinders would most likely be running slightly hotter than the outer two cylinders.

[James England]

James,

Riding in a parade, or in a traffic jam on a very hot day (95-100*F), those cylinder head temps could likely see close to 400*F (just over 204*C).

Granted, that's an extreme scenario, but here in Phoenix we have those kinds of temps, and even well beyond (115-120*F)!!

But under normal conditions, I would think the cylinder head temps would be in the 200-250*F (roughly 93-121*C) range ...

And the inner two cylinders would most likely be running slightly hotter than the outer two cylinders.

Blimey, that's hot! We don't get that sort of heat here, of course, but I get the point. There are no rubber dampers on the inner two cylinders..they go just on the head fins at 1 and 4.

It looks like it will have to be the Viton, I reckon. I wonder what the OEM ones are made of? Genuine rubber?

[Prisoner6]

Blimey, that's hot! We don't get that sort of heat here, of course, but I get the point. There are no rubber dampers on the inner two cylinders..they go just on the head fins at 1 and 4.

It looks like it will have to be the Viton, I reckon. I wonder what the OEM ones are made of? Genuine rubber?

James,

Not sure exactly what kind of rubber/material Yamaha used for the OEM dampeners, but ...

Something else you could try is this: If you have some old spark plug wire in decent shape (black, of course) lying around, it could possibly be used as an alternative.

I would think the spark plug wire would be more solid than, say, a heavy-walled/thick-walled fuel line, and would probably withstand the heat better ... JAT

[James England]

I bought a metre of 10mm diameter Viton. It's supposed to tolerate 200 degrees C. Then cut it into chunks and put it between the fins.....

[skids]

Is that some exotic stuff? Where do you get it, an auto parts store?

[donebysunday]

All my rubber bits seem to have shrunk! Only 4 out of 24 are big enough to stay in place. All the rest are too thin, regardless of which fin I try!

Has anyone tried making their own from a rubber pipe or similar??

I wonder why they shrunk ?
You can swell some rubber like parts with fuel or acetone, once swelled would they stay that way ? Does the heat of the engine keep them from shrinking, would it keep the ones that were swelled with acetone from shrinking back ?

[James England]

Is that some exotic stuff? Where do you get it, an auto parts store?

I got it on eBay. It's Viton cord...

http://www.ebay.co.uk/itm/230699144800?_trksid=p2059210.m2749.l2649&var=530037823396&ssPageName=STRK%3AMEBIDX%3AIT