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Old 12-30-2012, 07:45 PM   #1
allienfuel
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Default Marvel Mystery Oil in cranckcase

Someone was telling me that they used a shot of MMO in the crankcase. Something about the synthetic oil does not have some of the natural minerals as fossil oil. these minerals are soaked up in the clutch disc helping performance. Anyone heard of this? I don't know sounds possible to me. In was thinking of adding a shot going for a ride to circulate it and let sit for a while, before i flush with a oil change. I do put a shot of seafoam in the oil usually just before a oil change.
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Old 12-31-2012, 01:41 AM   #2
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You will find alot of personal preferences on oil on here...but basically use a oil with a lot of graphite properties in it. I've been using 15-40 in my 93 1500 and get a smoother clutch as a result. Remember these are wet clutch applications, as with a semi truck which I drive so I've used 15-40 for almost 30 yrs in them. Seems to work well in my bike too..I switch it out for winter storage to 5-30 for wither storage tho.
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Old 12-31-2012, 08:11 AM   #3
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mmo will thin you oil, use it as an enging flush or a carb cleaner but don't leave it in the enginge for anything else
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Old 12-31-2012, 09:11 AM   #4
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Do not put marvel mystery oil in your engine, listen to the Doc above!

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Old 12-31-2012, 10:40 AM   #5
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It's a motorcycle, using anything other than motorcycle formulated oil is a mistake.
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Old 12-31-2012, 10:43 AM   #6
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Default MMO and other oils

Whatever you choose to use in the crankcase, be sure that it conforms to the industry standards posted by Honda. Use only oils that are designed for motorcycles, not one used for cars. 10w-40, 10w-30, etc are only multiviscosity indicators, not universal approvals.
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Old 12-31-2012, 12:07 PM   #7
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won't hurt to flush it with mmo and maybe find a oil with a bit more graphite, just flushed the clutch system, but I can still feel a slow release in the clutch lever just the last little bit. works fine but when riding two up and really twisting it I got to give it a split second before twisting again after a shift or it will slip. thats the only time it will slip. I never seen a semi with a wet clutch been been driving since 90. worked on many farm tractors with a wet clutch.
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Old 12-31-2012, 03:41 PM   #8
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Quote:
Originally Posted by allienfuel View Post
I can still feel a slow release in the clutch lever just the last little bit. works fine but when riding two up and really twisting it I got to give it a split second before twisting again after a shift or it will slip. thats the only time it will slip.
You might want to remove the slave cylinder and give it a good cleaning and/or rebuild.
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Old 01-02-2013, 01:12 PM   #9
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I have used mmo in the past but in the new 1800 I will only use 10-40 Honda oil and quality 87 octane fuel.
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Old 02-17-2013, 11:36 PM   #10
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well don't know if it's the MMO flush or the fact I went Lucas oil synthetic 10/40 for wet clutch. but the clutch don't seam to slip now, and definitely shifts smoother. seams to just run quieter.
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