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Visit Chain Sling sights for chain loading charts and acceptable load bandwith. If you look hard enough there are chain programs available for download. One thing to assist in mind though is this chains are common rated very high in hours because however designed in order to for years not daily lives.
Dirt bikes are a fabulous example. Go ahead and take Yamaha YZ450F for research study. This is a bike weighing 245 pounds using a full gas tank. It holds 1.6 gallons of gas. Along with a tank that size you don't want extra high strength lifting chains power. Plus, with a chain you be capable of turning the sprocket size, which changes your machine ratio, to affect power delivery. In other words, you can tune the bike to quite riding style and taste.
If you want to to acquire a industry chains 2008 or newer 250F and are deciding determined reliability, just pick one. Really, pretty much all 250F's now are reliable IF, Basically IF, consider care professionals. Doing regular maintenance on the 250 four-stroke is very crucial and they will make them last a lot longer. There's no reason why you shouldn't have the ability to get 50+ hours on a stock top-end, as long as are not Pro or riding it on the limiter all day long.
Power Consumption