SUSPENSION BASICS


FRONT FORKS & WHEEL INSTALLATION

Installing the front wheel incorrectly can cause the forks to bind. This creates a harsh stiff feeling as the forks go through the stroke.  Most lower triple clamp bolts should be torqued to 12 - 15 ft lbs, while the uppers should be torqued to 17 - 18 ft lbs. Installing the front wheel correctly will ensure that no binding occurs. Consult your service manual for the correct torque setting.

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 manufacturer’s torque specification.

 

SHOCK INSTALLATION

First, feed the shock into its position within the frame and thread the upper and lower mounting bolts. Once installed, we always take the bike off of the stand and put it under load before then torquing the bolts to specification.  This will insure there is not any binding in the linkage or in the heim joints on KTM's.  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 and root infested trails.  Depending on the weight of the rider, we typically suggest 10 to 12+PSI for 2 strokes and 10 to 14+ PSI for four strokes.  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 and anything else you carry on a consistent basis while riding.  Checking the Static Sag will determine if you are in need of heavier or lighter spring rates.

Please find the guidelines for KTM models below. 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 any 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 and record this as L3.

5. The Rider Sag is determined by subtracting L1 and L3, this should be between 90 and 105mm.  If the rider sag is below 90mm the spring rate is too stiff, and if it is above 105~108mm the spring rate is too soft.