Will a new motorcycle chain stretch?

Do bike chains stretch over time?

Do bicycle chains really stretch? The short answer is no, however they do wear in such a way as to cause their maximum length to increase. Mechanics usually refer to this as chain “stretch.” It is the sign of a worn out chain that should be replaced.

What causes a motorcycle chain to stretch?

A motorcycle chain that keeps getting loose is usually caused by the rear axle or chain tensioning bolts not being tight enough. It can also be cause by a new chain not being worn in enough, worn down sprocket teeth, having too tight of a tension, or having the wrong size of chain installed.

Do chains actually stretch?

Although chains are frequently described as having stretched due to wear and use, the term “chain stretch” is slightly misleading. The phenomenon of chain stretch is more properly referred to as chain elongation, since it is not the case that the chain links themselves are actually getting longer.

What happens when a bike chain stretches?

The internal parts of the chain, the rivets and rollers, begin to wear out and give the illusion of stretching. This wear can cause the chain to mesh poorly with cogs and chainrings, causing poor shifting, premature wear to the cogs and even skipping over the cogs.

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How tight is a motorcycle chain supposed to be?

Push up on the bottom of the chain and note the distance between the full-slack (lower) position and the no-slack (upper) position on the bottom . 1.2–1.6 inches (30–40 mm) is typical for streetbikes, while dirt bikes may need 1.4–2.0 inches (35–50 mm) of slack.

How much do bike chains stretch?

The number most commonly agreed on for a worn chain is one percent elongation between links. In reality though, you want to replace the chain before this point. So therefore anything past 12, 1/16 inches (0.5 percent) would be the time to replace a chain.

How often should you change chain and sprocket?

A common rule is to replace both front and rear sprockets every time you replace your chain. This is a good rule to follow if your chain has lasted for its full life of, say, 15,000 miles. But, sometimes a sprocket replacement can wait in cases where you’re replacing a prematurely worn chain.

Do bike chains have a break in period?

There should be no “break in” period for a new chain/cassette combo. New chains and old cassettes may have issues which will not resolve themselves because the cassette is too worn but a new/new combo should work fine right out of the box.

How much can a chain stretch before it rides too high on the sprocket?

The maximum allowable wear elongation is approximately 3% for most industrial applications, based upon sprocket design. The allowable chain wear in percent for large sprockets with 68 teeth or greater can be calculated using the relationship: 200/N, where N is the number of teeth in the large sprocket.

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