GPR Stabilizer Install Part 2 | Tech

How to cure Harley wobble

Harley GPR stabilizer

Remove the bolt and the washer from the triple tree.

Words: Chip Kastelnik Photos: Mikey Van Senus

In part one, we started removing parts to make way for our new GPR stabilizer on our Harley-Davidson FXR. Now we're moving on to taking off the triple trees.

As many of you know, GPR stabilizers have been in the motorcycle industry for years. Anyone with a dirt bike, quad, ATV, or sportbike knows the GPR stabilization components are second to none. A few years back, GPR decided to see if it could appeal to the H-D market by trying to help relieve the frustrations of high-speed wobbles on XL and Dyna models. The crew at GPR had to make a kit that could allow the GPRV4 to mount easily yet remain as close to OEM specs as possible. The end result was a kit that consists of a triple tree, damper, and frame clamp that is easy to install, made of top-quality materials, and works like no other steering stabilizer system.

Harley GPR stabilizer

Loosen the top triple tree left and right pinch bolts and remove.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

Next, loosen the middle pinch bolt and set aside. You are now ready to take off your top triple tree.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

Using a rubber mallet, gently tap the tree so it pops loose and begins to slide upward.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

When the triple tree reaches a point where it is free from the fork tubes, simply pull the tree off of the fork tubes and remove.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

Push the old riser’s bushings out of the triple tree, and insert the new polyurethane ones.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

Using a 5mm Allen wrench, unscrew the bolts on the top of the frame adapter, and remove the damper tab holding bracket.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

Loosen the front pinch bolt on the GPR frame adapter clamp.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

Since we are installing this kit on an FXR, we must remove the top neck bearing dust shield to allow easy access to the GPR frame clamp’s install location.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

Using some spray lubricant, coat the frame so the clamp can slide over without binding.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

Use a small screwdriver to pry the clamp open and slide the clamp onto the frame.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

After you have installed the frame clamp, it should be sitting all the way down onto the top of the backbone.

Words: Chip Kastelnik Photos: Mikey Van Senus

Harley GPR stabilizer

Put the dust shield back in its appropriate place.

Words: Chip Kastelnik Photos: Mikey Van Senus