Fox RTS set up for K MOD rear suspension.
All Fox shock clickers adjust with the clicker hex head (HS) and slotted screw(LS), clockwise for firm and counterclockwise for a softer compression. Each adjustment has 25 clicks of adjustment.
For N/A stock engines 153 and 162
Front strap set at 12.5’’ as per instructions, 12’’ with 7 tooth drivers.
Front track shock spring set at 7-1/2’’ free length with the strap set first
Front track clicker, turn all the way counter clockwise and turn in 6 High speed and 10 low speed clicks with rebound at 10.
Rear track shock spring set at 10.5’’ free length for 200lb rider; adjust or preload for heavier rider or less for lighter rider.
Rear Coil Spring tuning.
The rear spring is a 190-280 rate with a 3’’ switch point and is 11’’ long, so if we adjust the preload ½’’ or (10-1/2’’ free length) we have 95lbs of static load, to increase the load (weight) carrying ability more, turn the spring clockwise, each two turns is 1/8’’ and equates to 24 more lbs of static load carrying ability. Remember as the shock is compressed the static load is added to the rate, (½’’ preload is 95lbs static) if the shock compresses 1’’ then the load is 95lbs static plus 190lb rate for 285lbs. As the shock compresses it goes up 190 for each inch of shock travel till the switch point then rises at 280lbs per inch. If the shock spring is preloaded ½’’, then the switch point goes to 2.5’’ of travel, so the more preload the sooner it gets to the 280lbs rate and the firmer the shock feels all the way through the travel.
Coil Spring Tuning for conditions
For deep powder days loosen front track shock spring to 7-3/4’’ and turn HS clicker in to 12 clicks , this will let the skid couple easier and get up on the snow quicker but still take the bumps.
For aggressive riding and more playful feel increase front track shock spring preload to 7’’ free length.
The faster you want to ride in the bumps the more clicker you will need front and rear, go three clicks in or firmer at a time then test. If bottoming out add three clicks HS at a time until bottom out goes away, after more than 20 clicks in then preload two turns on spring.
For tree riding loosen the rear track shock spring to where it is easy to throw into the hill, you can run more coupling when the spring is loose. Again on a stock sled I (200lbs) like about 10-1/2’’ – 10-5/8’’of free length on the rear spring for tree riding.
Turbo set up
Front strap at 12’’ to 12.5’’ as per instructions
Front track shock spring set at 7-1/2’’ free length with strap set first.
Rear track shock spring set at 10-3/8’’ free length; adjust for boost over 10 lbs. Rear track High and low speed starting at 10clicks HS, 10 LS and rebound at 12
The K MOD suspension is very tunable and small adjustments can make a noticeable difference, go two turns at a time on the preload and three clicks at a time on the clicker when tuning.
Defining low & high speed adjustments: Tuning Low & High speed clickers
When we talk low & high speed adjustments we are talking about shock shaft speed.
So we would make a LS adjustment when the rear feels soft on small bumps and lazy woops
High speed adjustment would be for sharp hits of holes that makes the skid bottom.
Rebound adjustments is for when the shock recovers to fast or slow, to fast you would feel a kick after a bigger hit: so you would turn the rebound in for a slower recovery.