Jump to content
Sign in to follow this  

Set Your Sag


BannerUp

Race sag is the distance the suspension sags under the combined weight of the bike and rider from its fully extended (topped out, no load) position. If your race sag is correct, your suspension is in the middle of its range, where it can handle the widest range of riding conditions without topping or bottoming out. For most riders, a race sag of 90-100 mm translates to the correct preload for dynamic conditions.

Static sag is the distance the suspension sags under the bikes weight alone, without a rider, from its fully extended position. Once you get your race sag correct, the static sag will tell you whether or not you have the correct spring for your riding weight. So always check static sag after setting your race sag, because the preload adjustment affects both.

STEP 1 => Put your bike on a stand, and measure the vertical distance from the rear axle to a spot on the rear fender. Record this value as M0…

PIC-1.jpg

STEP 2 => Take your bike off the stand, put on your riding gear, take a standing position, and measure again. Record this value as M1…

PIC-2.jpg

STEP 3 => Subtract M1 from M0… this is your race sag. If it’s between 90 and 100mm, skip to Step 5. If not, put your bike on a stand, lubricate the threads on the body of the shock, and proceed to Step 4.

STEP 4 => If your race sag in Step 3 was significantly less than 90 mm, decrease the preload by moving the rings up the shock body (ccw). If it’s significantly more than 100 mm, increase preload by moving rings down shock body (cw)… Repeat Steps 2 through 4 until race sag is between 90 and 100mm, then continue with Step 5.

PIC-3.jpg

STEP 5 => With your race sag now correct, and your bike off the stand, measure again, but this time with the bike under its own weight. Record this value as M2…

PIC-1.jpg

STEP 6 => Subtract M2 from M0… this is your static sag. If it’s between 25 and 35mm, your preload and spring rate are correct. Take your bike out for a test ride, then come back to this forum, and do “Adjust Your Dampening.” If your static sag is not between 25 and 35mm, proceed to Step 7…

STEP 7 => If your static sag is less than 25 mm with the correct race sag, your spring is probably too soft for your riding weight. What happened is this: to get your race sag correct, you set the preload higher than it would have been with the correct (stiffer) spring. So the bike sags less than the recommended value under its own weight. If your static sag is more than 35mm with the correct race sag, your spring is probably too stiff for your riding weight. What happened is this: to get your race sag correct, you set the preload lower than it would have been with the correct (softer) spring. So the bike sags more than the recommended value under its own weight. In either case, go to www.racetech.com, and checkout the recommended spring rates for your bike and riding weight. Buy the spring and install it, then recheck your race and static sag, and adjust as necessary. When you’re done, get in touch -- we’ll go for a ride…

Sign in to follow this  


User Feedback

Recommended Comments

There are no comments to display.



Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:


  • Similar Content

    • By WideningArc1
      PRODUCT DESCRIPTION
       
      The best possible suspension set-up for each track is most often what decides the winner. The PODIUM® RC3 gives riders unsurpassed suspension performance along with the ability to fine tune to the perfect setting quicker and easier than ever before. FOX's proprietary external adjustments allow riders to independently dial in the optimum amount of high- and low-speed compression, rebound, and bottom-out control, completely independent of each other.
       
      FEATURES/TECHNOLOGIES
      Adjustable Bottom-Out Control  (B.O.C.) to change the end of travel damping without affecting the first 3/4 of travel F.A.S.T. (Fast Adjust Spring Technology) preload device Dual compression adjuster with huge range of adjustment DLC coated shaft Exotic, proprietary coatings on shock body and reservoir to enhance durability and significantly reduce stiction High flow, Off-Road racing truck inspired damping piston ADJUSTMENTS
      - Bottom-Out Control (B.O.C.) - 24 clicks - Spring Preload with new F.A.S.T.  preload device - High Speed Compression - 24 clicks - Low Speed Compression - 24 clicks - Rebound - 24 clicks SPRING
      Coil APPLICATIONS
      Motocross Racing  
    • By essin
      GENERAL INFORMATION
       
      Enzo Racing offer performance upgrading coatings to the inner and outer tubes to reduce frictions. Using specific surface treatments for steel and aluminum, the side load frictions is reduced dramatically. Both of these surface treatments are used by Factory YAMAHA and KAWASAKI teams.

      For the outer aluminum tubes we offer KASHIMA coating which is a proprietary treatment offered only in Japan. KASHIMA coating is a very hard and low friction treatment applied to aluminum and is used by many factory teams. Enzo Racing offers high level KASHIMA coating treatment to stock front fork outer tubes.

      For the steel inner tubes, we use DLC (Diamond like Carbon) treatment. This is easily identified by its black color. This treatment comes production on the '07/'08 KXF450. DLC coated inner tubes greatly reduce the friction, which provides smoother action over sharp impacts and overall performance. The DLC coating is also harder and smoother than the standard chrome, and resists nicks from stones that can create sharp dings in the surface which in turn damages the oil seals that can turn into leaks. Included in the cost we also offer hard anodizing to the axle brackets.
    • By ThumperTalk
      Pro version of the socket for servicing a lot of WP PDS shocks
      Driven with a T-handle, hold the needle and is self-locating in the body
    • By VortecCPI
      GENERAL INFORMATION
       
      Custom damper rods modified and tuned specifically for your riding needs.
    • By SoftwareDevJason
      DESCRIPTION

      Mono Shock with Hydraulic Preload Adjuster, 38mm Stainless steel damper unit fully re-buildable, 18mm piston rod, wide ranging single circuit progressive damping adjustment with automatic compression / rebound balance. Black powder coated spring, fully progressive spring pre-load adjustment. Supplied complete with end mounting bushes / bearings, tools and instructions for spring and damping adjustments. 2-year guarantee. Hagon Shock Absorbers have a wide load carrying range and will be delivered with the spring preload set for an average weight rider (75–100kg). We can supply units built to individual customer requirements, shorter for seat lowering, heavier or lighter springs. If you feel you require a custom built unit please phone or email your requirements before ordering
×