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Molybdenum Disulphide Grease

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Raffles
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PostPosted: 21:13 - 04 Jul 2010    Post subject: Molybdenum Disulphide Grease Reply with quote

I shall soon be replacing a camshaft and I am in need of some Molybdenum Disulphide Grease. I have searched tinternet and have found items ranging from around £3.00 to over 10 times that amount. I don't want to skimp on the job but by the same token I don't want to get my leg lifted.
Can anyone recommend a suitable product?
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Davo
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PostPosted: 21:16 - 04 Jul 2010    Post subject: Reply with quote

I got a tin of the stuff from my local gun shop.

Worked out about at £3.95 for a 250ml tub

Bisley gun grease.

/edit: Funny enough the ebay links are posting a similar product, although for a fair bit more money.
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Ichy
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PostPosted: 21:24 - 04 Jul 2010    Post subject: Reply with quote

CV grease, 'tis close enough to be the same. Bang in a 50/50 mix of oil and you have assembly paste.
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smegballs
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PostPosted: 21:58 - 04 Jul 2010    Post subject: Reply with quote

Is this taking a cam out the back in again or a new new camshaft?

What are the advantages of assembly paste over lots of normal engine oil (which is what I do)?
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MarJay
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PostPosted: 22:06 - 04 Jul 2010    Post subject: Reply with quote

Halfords sell Castrol Moly Grease which is Molybdenum Disulfide Grease. Not sure on the price but I know it isn't that expensive, and it is definitely the right stuff.
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Ichy
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PostPosted: 22:20 - 04 Jul 2010    Post subject: Reply with quote

Molybdenum Disulfide (MD) has a very low friction coefficient with a high load bearing capacity. Add to this a thermal stability in air of around 400 degrees c and you have a compound that will give pretty good lubrication until the oil manages to pump itself around irrespective of how long it takes. Plain old oil just doesn't give the same level of protection, at a guess, just a few seconds, if the oil 'ain't a pumping then the cams are a grinding.
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Raffles
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PostPosted: 22:23 - 04 Jul 2010    Post subject: Reply with quote

smegballs wrote:
Is this taking a cam out the back in again or a new new camshaft?

What are the advantages of assembly paste over lots of normal engine oil (which is what I do)?


I will be installing a new camshaft.
The advantages of using MSG over normal oils and greases can be found in this article:-

https://en.wikipedia.org/wiki/Molybdenum_disulfide
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stevo as b4
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PostPosted: 21:23 - 05 Jul 2010    Post subject: Reply with quote

Silkolene racing grease is what i use as reccomended to me by my Kawasaki dealer. It's very good stuff and comes in a large tub that lasts ages, but i can't remember what i paid for it now.
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Pete.
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PostPosted: 14:14 - 06 Jan 2011    Post subject: Re: Molybdenum Disulphide Grease Reply with quote

Raffles wrote:
I shall soon be replacing a camshaft and I am in need of some Molybdenum Disulphide Grease. I have searched tinternet and have found items ranging from around £3.00 to over 10 times that amount. I don't want to skimp on the job but by the same token I don't want to get my leg lifted.
Can anyone recommend a suitable product?


Assemble the camshaft using normal engine oil as lube, then fill the wells in the head with normal engine oil. If you're just doing the cams that's all you need to do, but if it's a full engine strip prime the oiling system before starting the engine by turning the oil pump either by hand or by battery drill until it pumps out of the camshaft feed holes.

Assembly grease is handy for rebuilding engines that are going to be stood about un-used for lengths of time before their first run, or transported with no oil in them - such as race engines. Using the system above is no different to parking the bike up and starting it up again later.
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stinkwheel
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PostPosted: 17:21 - 06 Jan 2011    Post subject: Reply with quote

I think assembly using grease is one of those historic things that noone wants to be the first to stop doing.

Turning a modern motorcycle over on the button, how many ngine revolutions is it going to take for pressurised oil to hit the top-end? I'd have a stab at three or four. If I do a rebuild, I make sure there is plenty of oil in there as i assemble it then turn the engine over 20-30 times with the plug out (either with a spanner on the crank or using the starter). The oil pressure light has usually gone out by the third revolution and that indicates there is enough oil pressure to hit the roof of the garage.

I reckon the grease thing dates back to bikes like my Enfield. It takes about 20 seconds for oil to reach the crank quill bolt and a good 2 minutes of running at idle for oil to reach the rocker assembly (and dribble out slowly) following a stripdown.
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Mark65
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PostPosted: 19:21 - 06 Jan 2011    Post subject: Reply with quote

I have two tubs of moly grease, pm me your addy and i will send you a blob, i also have a tub of moly powder used for coating bullets, i mixed this with marine grease for my swingarm overhaul.

Mark
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ThoughtContro...
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PostPosted: 23:09 - 06 Jan 2011    Post subject: Reply with quote

People might have noticed if they could see the spam post that revived it
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Raffles
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PostPosted: 23:28 - 06 Jan 2011    Post subject: Reply with quote

Thanks for the answers, kids but as Chris says this thread is 6 mths old and has been bumped by someone who has joined the forum today with the sole intention of selling some grease.
Thanks for the kind offer, Mark, but I'm now sorted.
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Mark65
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PostPosted: 08:48 - 07 Jan 2011    Post subject: Reply with quote

Doh! Embarassed Embarassed
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woodyfjr
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PostPosted: 17:22 - 09 Jan 2011    Post subject: Reply with quote

Honda do a small stick of grease which is 60% Moly very handy.
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