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MX | Off-Road Gear Info & Reviews
Primary Drive (RockyMtnATV's brand) Chain Opinions?
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[QUOTE="mtk, post: 1100104, member: 54339"] To add a bit of gasoline to this fire: Being a motorcyclist for 35 years means bupkis to me. I can walk across the street and find a half dozen Harley riders with that kind of experience and none of them know how to use the front brake. The moral of the story being that you can do something wrong for a long time; that doesn't make it correct. Rick, the stuff you pulled out of Jay's post made perfect sense to my engineering brain. Conventional chain lubes, aka fluid film lubes, are fluid-based (hence the name) and fluids are known to attract and hold dirt particles. Dry film lubes are a different animal entirely, which Jay explained quite well, and their dry nature means that they're not a sticky, gooey mess that dirt will readily stick to if given the chance. Yes, they ARE wet when applied, but the solvent carrier is allowed to evaporate before they're put into use so they don't attract dirt. These types of lubricants are also commonly used in the firearms industry, for similar reasons. On the other hand, Jay, Rick's point about the stresses on an O-ring chain are also correct. The side plates ARE spaced further out and as such the bending moments will be larger because of it. Whether or not this matters is another issue entirely; one which I won't be touching. But the bottom-line mechanics of it are undenyable. However, Rick's point about O-ring chains and severe environments does make sense, at least to my engineering brain (as well as those employed by the manufacturers of off-road bikes, since they're standard equipment on many models as he noted). O-rings are a two-way seal; they keep the lube in but they also keep the crap out. On a bike that is frequently covered in mud, that is definitely going to be a feature. Finally, unless the O-ring chain is assembled in a vacuum chamber there will also be oxygen present inside the sealed portion of the chain. That area also gets hot during operation, quite hot I would imagine since it is the primary friction area inside the chain and this frictional heat (amongst other sources) eventually raises the temperature of the entire chain. As such, oxidation of the lubricant is virtually guaranteed. How long this takes is another matter, one which I'm not touching. [/QUOTE]
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MX | Off-Road Gear Info & Reviews
Primary Drive (RockyMtnATV's brand) Chain Opinions?
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