I am ordering chain tensioners for 2 friends and I don't know what typ they are. Ones a 1998 scrambler 400 4x4, and the other is a 2001 scrambler 400 4x4. I am almost positive they are both concentric drives but just wanted to double check before ordering

 

i know the 01 is conconcentric and im pretty sure the 98 is also.just look to see if it has the brakes on the axle or not..

 

rear breaks are on the axle just like mine, does that mean it is concentric?

 

yeah thats what it means[img]i/expressions/face-icon-small-smile.gif[/img]

 

Thanks!!! [img]i/expressions/face-icon-small-smile.gif[/img][img]i/expressions/face-icon-small-smile.gif[/img]

 

More important concentric means the swing arm pivot point and the front sprocket are in a straight line with eachother. In other words if you were to put a rod through the swing arm pivot point it would pass through the center of the front sprocket. They travel within concentric circles. Which basically means they have a common center.

 

Which also means that the chain will keep a consistant tention throughout the range of the swingarm, because the rear axle will follow the same radius as the front sproket, thus not loosening and tightening, like my 97' does...