Basic A-Arm Installation Instructions

Required Tools
Bike/Quad stand
Socket & wrench set
Deep Socket 14mm 12point (Long Travel Only)
Please follow the step by step directions one step at a time

Step 1 - Lift bike on to stand and remove front bumper, use a socket or wrench

Step 2 - Remove Cotter Keys from Ball joints

Step 3 - Losen Ball Joints (not all the way) usually a 17mm or 19mm socket or wrench

Step 4 - Remove bottom shock bolts on a-arms allowing a-arm to drop, usually a 14mm or 17mm socket and wrench

Step 5 - Disconnect brake line tabs from top a-arms using a 8mm or 10mm socket or wrench

Step 6 - Remove tie rods with a 19mm wrench. Remember one jam nut is a right hand thread, while the other is a left hand thread. (General rule of thumb is that the left hand threads are on the steering stem end, while the right hand thread is on the spindle end, except Yamaha)

Step 7 - Breaking ball joints loose from spindle - while putting downward pressure on spindle or tire using a hammer and an aluminum block. Smack the outside edge of spindle which will "shock" the ball joints loose. Make sure you have left the nuts attached loosely to the ball joints otherwise everything will fall -

Step 8 - Now you may remove all nuts attaching a-arms to frame.

Step 9 - Remove ball joint nuts, spindle and wheel from a-arm. You can place the tire, spindle, etc CAREFULLY on foot pegs, but be careful of brake lines

Step 10 - Remove bolts holding A-arms to frame, then remove arms -

The bushings used in the JD PERFORMANCE a-arm kits are self-lubricatting. DO NOT use grease between inner metal sleeve and bushings. Grease may be used between Metal sleeve and bolt only

Step 11 - Install NEW lower arms. Be sure the laser cut "JD" is facing forward

Step 12 - Install top arms. The longer of the tubes should be towards the back of the bike.

Step 13 - Reinstall spindle to ball joint being careful not to damage the brake lines, and start nylock nuts (included with new a-arm kit)

Step 14 - Apply downward pressure on spindle or wheel and tighten nylock nuts on balljoints. If you reinstalled the lower shock bolt, remove it, and tighten ball joint nuts WITHOUT shock connect to lower a-arm.

Step 15 - Reconnect shock to lower a-arm.

Step 16 - Install New tie Rods. Remember one side is left hand thread, while the other is right hand thread. If it doesn't begin to thread in, try flipping tie rod over and thread in to other tie rod end.

Step 17 - Check all nuts, bolts and connections one more time to make sure they are tightened properly.

Now is the time to adjust your Camber, Caster and Toe settings. READ BELOW

Step 18 - Go Big, but be safe!


Caster adjustment

To set the caster is the fastest and easiest in the industry. The top arms have "caster shims". Simply remove the top A arm bolt (or 2 bolts for non Yamaha) and relocate the shims and shift the arm forward or back. The whole process takes 5 to 10 minutes, and adjusting the caster does not affect your camber settings.

Camber Adjustment

On our A-Arms, the ball joint slides through the end of the arm, with a jam nut on the outside and lock nut on the inside. Camber adjustment is done by simply loosening one nut and tightening the other. For those of you who are worried about the jam nut on our set up, simply use a little Locktite.

How to set Camber Properly

1. With all nuts and bolts tightened and tires properly inflated, place your quad on a level surface (usually your garage floor) and adjust handle bars so they are perfectly straight.
2. Once your bars are straight, attach a tie-down to each end of the bars and the rear grab bar. Tighten these evenly so the handle bars remain straight and can not be turned. Basically locking the bars in position.
3. Place a framing square (or other Large right angle) flat on the ground and against the outside of one tire.
4. With the Jam nut and Lock nut loose (on the upper a-arm) slide the ball joint in and out until there is about a 5/8 inch gap between the upper portion of the tire and the framing square.
5. Carefully tighten Lock nut and Jam nut on ball joint while maintaining proper gap.
6. Repeat on other side.


Care Of Bushings
After washing your quad, spray a little bit of WD-40 into the bushings to displace water. Should a squeek develop, use a small amount of WD-40 or dry graphite spray as a quick fix. The Squeak indicates foreign matter in the bushings and should be cleaned out as soon as possible

Regular Maintenance Regular Maintenance should be done every 40-50 hours of riding. Remove all metal sleeves, blow out any dirt that may be inside. When clean, insert metal sleeve back into position. WD-40 may be used when inserting sleeve