SYNOPSIS
We have noticed that the chain on almost every chain-driven bike we have inspected in the parking lots of long-distance events, including the Iron Butt Rally, is incorrectly adjusted. They are almost always fitted too tight. Even if the chain is properly lubricated and the rear wheel is correctly aligned, using a chain with too little slack leads to premature chain and sprocket wear, suspension binding, and can even result in damage to the bearings supporting the idler shaft. and the sprocket support on the rear hub.
INTRODUCTION
At the other extreme, running the chain too loosely can create excessive slack in the drivetrain. This makes smooth throttle transitions and shifts more difficult, adds higher shock loads to the rear hub and transmission gears, and in extreme cases can actually “saw” the swingarm or frame. A poorly adjusted chain is also more prone to failure, which can leave you stranded. In extreme cases, it can involve the rear axle and sprocket and block the rear wheel, causing a collision. Which raises the question: since the consequences of a poorly maintained chain can be so costly, why don't more users ensure their chains are adjusted correctly? We suspect that the main reason for chain problems is the result of owners not taking the time to thoroughly inspect the drivetrain or understanding the procedure for properly adjusting the chain on their bike. This article is for those riders who fall into the latter category. Adjusting the chain isn't difficult, but it does require a little patience to get everything set up correctly the first time.
chain tensioner mechanical design WORKING PRINCIPLE
Now that the chain is clean and aligned correctly, it's time to begin the adjustment process. The first step is to determine how much slack there is in the chain. This is measured as the vertical deflection at the midpoint of the bottom of the chain, with the bike in gear (but the engine off) and the rear wheel rotated back to remove any slack from the top of the chain.
BENEFITS
• To increase vehicle mileage
• To reduce sprocket wear
• Good vehicle operation
• Silent chain rotation
• Less friction loss
DISADVANTAGES
• More time needed to adjust current
FORMS
• Application for all two wheels
