How do you check chain slackness?
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 tight should a chain drive be?
It is important to maintain the proper amount of chain tension. If the chain is excessively tight, rapid chain wear and loss of lubricant will occur. If chain is too loose, excessive vibration and pulsation may occur causing chain damage. For normal drives, adequate slack should be adjusted to 4% of the chain span.
How much does it cost to tighten a motorcycle chain?
Small adjustments of a quarter turn (or less if your chain is only slightly loose) are the safest bet. Measure the slack after every change. When the chain is within factory specifications (usually around 1.2–1.5 inches), tighten the axle nut to keep it from slipping.
What causes uneven chain tension?
If you’re changing the tension every 500 miles something must be wrong. The most likely reason is either that the chain is low quality or you’re keeping it too tight. It’s always better for a chain to be a bit on the loose side than even the tiniest bit too tight.
Why is my BMX chain tight and loose?
It is not uncommon for a new bike to have a tight-spot in its chain. If you feel your BMX chain has a “tight spot,” the first thing you should check is the Sprocket. This tight spot on a BMX bike is usually caused by the bolts behind the Sprocket being loosened. A simple tightening of the bolts should fix a tight-spot.
How often should chain drives receive maintenance?
All chain drives should receive regular maintenance. Each drive should be inspected after the initial 100 hours of operation. Thereafter, most drives may be inspected at 500 hour intervals. However, drives subject to shock loads or severe operating conditions should be inspected at 200 hour intervals.