SUSPENSION BASICS

SUSPENSION SET-UP


Front Forks and Wheel Installation

Installing the front wheel incorrectly can cause the forks to bind, this will create a harsh stiff feeling as the forks go through the stroke.  Most lower triple clamp lower bolts should be torqued to 12 to 15 ft. lbs., with the uppers being torqued 17 to 18 ft. lbs.  Consult your service manual for the correct torque setting.

Installing the front wheel correctly will ensure you do not bind the front forks. Here is the process we use at Konflict Motorsports and Suspension.
1. Install front wheel.

2. Slide axle through forks, and tighten the nut (O.E.M torque spec) leaving the axle pinch bolts loose.

3. Remove the bike from the stand, lock the front brake and compress the suspension 4 times to center the axle in the fork lugs.

4.   Tighten the axle pinch bolts to manufactures torque specification.

 

Shock Installation

When installing the shock onto the bike, always torque the bolts to manufactures torque specification.  We always install the shock, take the bike off of the stand a put it under a load, then torque them to specification.  This will insure there is not any binding in the linkage, or on KTM's in the heim joints.  Consult your owner's manual for proper torque settings.

 

Tire Pressure

A high amount of tire pressure can cause harshness and deflection which will create a feeling of unbalance on tough rocky, root infested trails.  Depending on the weight of the rider, we typically suggest for 2 strokes 10 to 12+PSI, and for four strokes 10 to 14+ PSI.  Of course this is dependent on where and what type of terrain you are riding.

 

Rider Sag

Checking the sag on your bike is something a lot of riders overlook, but this is one of the most important steps you can take to ensure your bike is set up properly.  A bike that has not had the proper springs for the rider installed will handle poorly.  Here are the steps you need to take to set your sag.  When completing these steps, have all of your gear, camelback, butt bag, anything you carry while riding with on a consistent basis.  Checking the Static Sag will determine if you are in need of heavier or lighter spring rates.

These are guidelines for KTM models, call us with your bike information, or consult your owner's manual for proper settings.

Follow these steps:

1. Inspect the shock, check to make sure the heim joints, and linkage bearings for any stiction, or binding. If and play or binding replace as needed.

2.  Have the bike on a stand with the suspension fully extended.  Make a mark on the rear fender directly above the rear axle nut.  Measure from the center of the axle vertically to the mark on the fender.  Record this measurement as L1.

3.   With the bike removed off the stand and the help of a friend measure the distance from the center of the axle, to the mark on your fender.  Record this measurement as L2.  This is your Static Sag, and should be adjusted to 35mm (on KTM's) by turning the pre-load adjuster. Deviations of as little as 2mm can strongly influence the handling of your motorcycle.

4.  With the bike off the stand and the rider aboard standing in a neutral riding position, bounce up and down on the bike. Again measure the distance from the center of the axle to the mark on the fender.  Record this as L3.

5.   The Rider Sag is determined by subtracting L1 and L3, this should be between 90 to 105mm.  If the rider sag is below 90mm the spring rate is too stiff, and if it is above 105mm the spring rate is too soft.