Zorros Racing Team..
- Apr 11, 2012
This is great info, exactly what I am looking for. I am for sure not racing and not jumping big. Just some rugged trail riding and occasional sand. That is why I was wanting to work on the motor. I think I can adjust my stock suspension to ride decent for me. Any suggestions you have for going about that I am all ears! Thanks.
I compiled all of the info on this page from some web searching and from experts like Laz at GT Thunder, Tyler (KillerQuad, MSI Racing), Rudy at DFR, and Jim at Motowoz. I am not an expert at all. I just try to make adjustments based on what the experts tell me. Motowoz and GT Thunder have been a great help to me. They stick by their products and they are very knowledgeable.
Here is a nice image that shows how to setup the camber, it was posted on a forum.
The ATVriders.com alignment page.
Prior to doing any setup you need to set your tire pressures to whatever you race with and find a nice flat surface. To set the toe I use a collapsable aluminum straight edge from home depot. To set camber I use a digital level, a regular angle finder works fine too. You will also need a tape measure.
Recommended ATV suspension alignment settings (Primarily XC desert racing):
Setup your suspension in this order: Ride height, Caster, Camber, Toe. If you are setting up a brand new suspension and things are way off; first get the tow in the ballpark, then do the ride height, caster, camber, and final toe.
Ride Height: 1/4-1/2" higher in the front than the rear.
Caster shims (JD Performance A-arms) in the front for desert / in the back for MX. 4-7 degrees caster for MX, 7-10 for Desert.
1/4” toe in
1-2 degrees negative camber
Ride Height: Setting the ride height is very important and often overlooked. You need the front of the quad to be slightly higher than the rear in order for it to handle correctly. Ride height is measured with the racer on the quad in the racing position. Then have someone measure the distance from the ground to the bottom of the footpeg. Then take the same measurement at the frame, just behind the a-arm (approximately 22" in front of the footpeg) First get the rear height where you want it, I normally set the rear ride height with the preload on the rear spring wherever the shock tuner/manufacturer recommends. Then I setup the front around that. For instance your ride height at the footpeg it is 7.25" and 22" forward of that it is 7.50" (this is probably an MX type ride height) The ride height on my desert racing quad is 9" at the peg. You can set the ride height anywhere you want, just be sure your front measurement is 1/4 - 1/2" higher than the measurement at the foot peg.
When setting up sag and ride height on new shocks or a new setup I setup the rear shock pre load according to whatever the shock builder recommends. Then I check the height at the peg and at the front of the frame then I setup the pre load on the front shocks in order to get the ride height correct.
Rebound: Rudy taught me this trick for checking rebound in the rear. Push the quad all the way down using the rear bumper, then pull it up hard. The rear tires should come off the ground towards the end of the shock travel, prior to the shock being fully extended and the tires simply being pulled up by the shock. If the tires are just being pulled up by the shock the rebound is too slow. Adjust it clockwise to speed it up a bit.