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Post by gallitzin on Oct 25, 2018 21:01:00 GMT -5
The 2009 Yamaha Vino Classic owner's manual states that this model comes with a catalytic converter. I cannot find any other mention of a catalytic converter in any reference other than the owner's manual. 
Motorcycle oils meant for racing seem to have high counts for zinc (above 800 ppm). There is some standard that says that oil is meant to have 800 ppm or below to prevent damage to catalytic converters in normal street use, since the zinc ends up coating it like it does for internal engine parts.
Since I can't find a "catalytic converter" listed anywhere in the service manual OR the parts diagrams, is the owner's manual just copied from a template for other Yamaha motorcycles?  Does the catalytic converter actually exist? Do 4-stroke 50cc scooters bother with catalytic converters?
Owner's Manual for 2011 (says the same thing as 2009):
Service Manual for 2006-2009 (not a word about catalytic anything):
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Post by GrumpyUnk on Oct 26, 2018 12:41:42 GMT -5
Some manufacturers claim their mufflers have catalytic converter material built in at the factory. Given that palladium and .. here, from the goog: Image result for catalytic converter metals www.thermofisher.comPlatinum is the catalyst in a catalytic converter, but there are other metals as well, including palladium, rhodium, copper, nickel, cerium, iron, and manganese. These are not inexpensive metals, platinum being used in high end jewelry for example. My suspicion is that there may be a minimal amount of catalyst metal(like the size of a penny with a 3 nanometer deep coating) so I would not worry about the zinc in the lubricant causing any significant difference in operation of the engine, nor in effective reduction in emissions. IOW, it may be installed for the sake of 'compliance', as in 'We are doing something. Look at our mufflers with catalyst...' I would not be too overly concerned. I would suggest using diesel rated lubricants, 15W40 being a good choice in my opinion. The main thing the Zn affects would be the cam follower area of the rocker arm. Sliding friction is where the zinc would help, reducing wear. A set of rockers is so inexpensive as to not worry a lot. IMO tom |
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Post by FrankenMech on Oct 26, 2018 12:57:28 GMT -5
The cam lobes see a lot of wear and zinc helps in that area. Diesel oil is good.
I 'cough' removed my catalytic converter...
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Post by 90GTVert on Oct 26, 2018 18:57:35 GMT -5
I don't know what the Vino has, but I've chopped up a couple of mufflers on Chinese scoots and the cat was integrated into them. Just a small section with some honeycomb material in it, but no separate catalytic converter. Some form of cat is required on 2008 and newer models by law, so it's in there somewhere. I don't really know how sensitive they are. My 2013 TaoTao should have one in it's muffler. I eliminated the PAIR system (which some say will cause the cat to clog) and use Shell Rotella T with a high zinc content and so far so good for 5 years and 5,000+ miles.
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Does the catalytic converter actually exist? Do 4-stroke 50cc scooters bother with catalytic converters?
