molybendum oil?
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Superstock
Joined: Apr 2009
Posts: 395
From: Columbus, OH
molybendum oil?
Someone will probably scorn me for this but eh... What is molybendum oil? I saw it in the knowledge base reading up on checking my valves and looked but no explanation. Thanks fellas.
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MotoGP
Joined: Aug 2007
Posts: 5,942
From: Lake View Terrace, CA
It is usually used when building a new motor as a way to prelube the bearings and journals so they don't run dry until you build oil pressure.
If you are just checking the valve there is no need for it.
If you are just checking the valve there is no need for it.
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From: Northeast Ohio
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Superstock
Joined: Aug 2009
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From: Warrenton Virginia
molybdenum is an element it naturally occurs in the ground and has some interesting properties, it's hard as crap, it's heavy as crap (heavier than steel and lead, lighter than tungston) and it's slick as crap. I think it would be interesting to sleeve a cylinder with it. It's great in high temp aps and hard enough roads have been built around large deposits instead of going through. Think of it as adding powdered graphite to your oil
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MotoGP
Joined: Aug 2007
Posts: 5,942
From: Lake View Terrace, CA
molybdenum is an element it naturally occurs in the ground and has some interesting properties, it's hard as crap, it's heavy as crap (heavier than steel and lead, lighter than tungston) and it's slick as crap. I think it would be interesting to sleeve a cylinder with it. It's great in high temp aps and hard enough roads have been built around large deposits instead of going through. Think of it as adding powdered graphite to your oil
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SuperSport
Joined: Jul 2008
Posts: 505
From: Twin Cities
My Yamaha service manuals for my dirtbikes talk about this all the time. Molybendum grease and molybendum oil. They want you to use grease on some things and oil on others. It even tells you that to get molybendum oil, you take molybendum grease and mix it 1:1 with engine oil. The grease can be found at most auto parts stores. I've tried to locate some commercially available molybendum oil with no luck. So I just made up a batch and keep it in one of those little oil cans with the pump trigger.
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Superstock
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From: Columbus, OH
I was going over the manual and the kb preparing to tackle the valve check on the hawk. Gotta say im a little nervous but i know i can do it and save hundreds in the process. The manual says to put some moly on various parts when reassembling the cams. Should i or should i not?
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I wouldn't use moly. I would try to find a 100% DE waxed paraffinic base oil. Non commercial grade but maybe a high performance oil such as Lubrication Engineers, Amsoil, Rep-sol, or schaeffer oil to name a few.
Last edited by super duper hawk; Mar 8, 2010 at 01:09 AM.
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SuperSport
Joined: Nov 2007
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From: Hamilton, Ontario, Canada
I used the recommended moly oil homebrew. A good assembly lube probably would work too. I'm sure there are alternatives.
The cam rides in the aluminum of the cylinder head. IIRC, Honda's been doing this since the CB350. I've never read of a VTR1000F's cam bearing surfaces being scored or a cam being damaged as the result of negligent assembly following a valve shim replacement.
If you care enough about these details to post your question, you're more than careful enough to check valve clearances and change shims.
The cam rides in the aluminum of the cylinder head. IIRC, Honda's been doing this since the CB350. I've never read of a VTR1000F's cam bearing surfaces being scored or a cam being damaged as the result of negligent assembly following a valve shim replacement.
If you care enough about these details to post your question, you're more than careful enough to check valve clearances and change shims.
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From: Scottsdale , AZ
Read your service manual . Moly lube is used all the time . It is a assembly lube used Used for camshaft installations , clutch outer guides , outer needle bearing , water pump driven sprocket shaft , primary drive gear and sub gear sliding surfaces etc. etc. I believe it is used very sparingly . Also Bel-Ray makes Moly grease and oil . Bel-Ray makes a good product.
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Superstock
Joined: Apr 2009
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From: Columbus, OH
hmmm. mixed opinions. thats normal around here though! I have just read in some of the searches that moly is bad. just want to do it right. Now if i could just close on this new house i could use my new garage! Carports suck for wrenching on bikes!!
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Squid
Joined: Mar 2012
Posts: 65
From: Northeastern Utah
Moly is for chumps. Any grease application that calls for a Moly... use Slipstream Grease instead. Moly can build up and harden like crazy, making it a real PITA go clean back out. Slipstream doesn't harden like Moly.
(Personal Resume here - I've studied lubricants in great depth as I'm Co-Owner of Crusader Weaponry and we make Slipstream. We tested lubricants extensively and found Moly to be something you don't want in your Firearms, Locks, Hinges and especially motorcycles. The stuff we use in Slipstream is a better lubricant, without the negative side effects Moly can bring to the table. I'm not trying to sell anything - just saying... use what you want... But avoid Moly.)
(Personal Resume here - I've studied lubricants in great depth as I'm Co-Owner of Crusader Weaponry and we make Slipstream. We tested lubricants extensively and found Moly to be something you don't want in your Firearms, Locks, Hinges and especially motorcycles. The stuff we use in Slipstream is a better lubricant, without the negative side effects Moly can bring to the table. I'm not trying to sell anything - just saying... use what you want... But avoid Moly.)
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