On average, however, most street motorcycles will need a chain tension of about 20 – 30 mm, or about a half inch to an inch in slack. This means that the chain should be able to move about a half inch to an inch up and about a half inch to an inch down. It's easiest to measure this using a measuring tape.
Is my motorcycle chain too loose?
Another symptom of a loose chain on a motorcycle is a chain tug, a tugging feeling you feel when the bike keeps steady RPMs in a lower gear, which is another symptom of a loose chain.
How do you know if a chain is too tight?
The chain should be tight enough that it only allows you to move it up and down about half an inch. If there is no slack in the chain then it is too tight. And if there is too much slack then you need to tighten that chain.
Does a motorcycle chain get tighter when you sit on the bike?
Premium Member. The reason the chain gets more tight, as you sit on the bike, is the distance between the sprockets gets longer as you compress the rear suspension. This makes the chain get tighter. It's just how it is, on almost every bike.
How tight should my chain tension be?
The rule of the thumb says that the exact tightness of a chain will only let you move for about half an inch. Now, if the chain is too loose, then you need to tighten it. If you cannot even move the chain, then it is too tight, and it needs to be loosened.
40 related questions foundWhy is my motorcycle chain tight and loose?
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.
How do you tension a chain?
To adjust chain tension, loosen the bolts that fasten the motor base to mounting angles on both sides. Tighten take-up bolts until desired chain tension is reached. Do not over-tighten. A good rule of thumb is 1/4" deflection in the chain between the sprockets.
Why is my bike chain so tight?
As you increase suspension loading, the rotation of the swing-arm will cause the effective chain length to change, causing it to tighten up or loosen depending on the geometry of the chassis. You need to get the chain tension adjusted to suit the kind of load you regularly carry on the bike.
What happens if your chain is too loose?
The major symptoms of a loose chain include chain teeth skipping over the sprockets, uneven transmission of power to the wheel leading to jerky wheel movements, chain lash and the chain slapping the swindle arm, and in the final case, chain coming off the sprocket.
Why does my pit bike chain keep coming off?
Check that your rear sprocket and chain guide are properly aligned to one another and buy a proper chain. All chains stretch regardless of make and if you have had the bikes a while, the sprockets could be worn and need replacing.
How much tension should a dirt bike chain have?
Correct chain slack should be around 1 – 1.25 inches at the end of the chain guide. An accurate way to see if it is correct is to put 3 fingers between the chain and the swingarm, right at the end of the chain guide. The chain and swingarm should be pressing on your fingers.
How often should I lube my dirt bike chain?
Use dirt bike chain lube before each ride and after every wash. Apply a dedicated chain lube that's designed to avoid attracting dirt to the chain before each ride or race.
Does a motorcycle chain stretch?
A chain will naturally seem to stretch as you ride, but it should never stretch to more than 2 percent. If you're experiencing significant stretch with a new chain, contact the manufacturer. However, old chains will begin to see significant stretch.
How do you loosen a motorcycle chain?
Turning the adjusters clockwise will tighten the chain, and counterclockwise will loosen it. By turning the adjusters, you're moving the whole wheel up and down the swingarm, so it's important to move them gradually and equally on both sides of the bike.
When should I tighten my bike chain?
It should be tight enough that it only allows you to move it up and down about one inch. If it is sagging or much looser than that, you need to tighten that chain up. Chains often loosen when a bike does not have a derailleur. Derailleur is the gear changing mechanism towards the back of the bike.
How do you fix a stiff motorcycle chain?
If you can soak a small rag with the penetrant and wrap it around the chain overnight. Then see if you can work the link in both direction by hand. Most of the aerosols will evaporate so the rag gives you a longer soak. If the link frees up spray it with a chain lubricant so it will stay flexible.
What happens if you don't lube your motorcycle chain?
Without Lube: A dry chain will let out an ear-piercing squeal and won't shift smoothly. Eventually, it will rust, and it could snap midride. Lube It: Soak a clean rag with degreaser, such as Pedro's Oranj Peelz Citrus Degreaser.
Is WD40 good for dirt bike chains?
Yes, the almighty WD40 is still a common chemical that riders use on their bike chains. While it is great for keeping a chain clean and rust-free, it is more of a penetrating solution than a lubricant.
How often should a motorcycle chain be lubed?
A motorcycle chain should be lubricated every 300-600 miles to ensure peak performance and a long life. Lubricate the chain after riding, not before. This allows time for the solvents in the spray to evaporate before the bike is used again, and lets the lubricant penetrate the link properly.
How tight should my mini bike chain be?
As discussed, a bike chain shouldn't be too tight or too loose. Instead, its tension should be about 0.5 inches. That's the only chain tension that can guarantee the best performance from your bike chain.
Why does my bike chain fall off when I pedal backwards?
Stiff links in a chain can cause it to fall off the chainwheel when pedaling backwards because they are not moving as smoothly as they should be. The chain mechanisms on a bike need to run like a well-oiled machine. The movement of the chain needs to be smooth and any stiff links can disrupt this.
Do new dirt bike chains stretch?
Chains don't stretch. The outside measurement of an individual link plate does not get longer with wear. Your bike is not “so powerful” that is stretches the chain. Chains are constructed of essentially link plates, pins, bushings and rollers.
