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post #5 of (permalink) Old 01-01-2013, 08:17 PM
Tree Trimmer
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here this should help.

FRONT SAG

PLACE SLED FLAT ON LEVEL GROUND AND NOT ON DOLLIES OR A LIFT OF ANY SORT. SET THE SPRINGS AT FULL SOFT IN THEIR ADJUSTER, #1 ON MOST HPG, OR BARELY LOOSE IN THE RETAINER ON THREADED BODIES. LIFT THE SLED OFF THE GROUND, SKIS JUST TOUCHING OR NO MORE THAN 1/4" GAP BENEATH AND HAVE SOMEONE ELSE QUICKLY MEASURE FROM THE GROUND TO THE FIXED POINT OF INTEREST ON THE FRONT BUMPER. LET THE SLED DOWN EASY OR WITHOUT DROPPING HARD. REMEASURE & SET SAG AS FOLLOWS
-2" FOR SEMI AGRESSIVE RIDERS,MORE PLUSH SETUP BUT BODY ROLL MAY OCCURR -1" FOR VERY AGRESIVE RIDERS ,EXCELLENT FLAT CORNERING
IF YOU NEED TO RUN THE SPRINGS AT MAX PRELOAD FOR PROPER SAG YOU ARE A CANDIDATE FOR HEAVIER SPRINGS AND/OR PROPER VALVING

tuning note **if you have the springs too soft you will blow thru the stroke and it will feel stiff, even though its actually way soft and bottoming hard and fast.

CENTER SAG/LIMITER STRAP

THE TAIL OF THE MACHINE MUST BE ON A SUITABLE SAFE STAND WITH NO WEIGHT ON THE REAR SUSPENSION OR TRACK. COMPRESSING THE TENDER SPRING IN ANY DUAL RATE SET-UP TOO FAR WILL CAUSE HARSHNESS ON THE washboard terrain AS YOU HAVE NOW COLLAPSED THE TENDER SPRING AND NOW ARE RIDING THE MAIN SPRING
**tuning tip, a slightly stiff feel here and there but not often while riding is a good setup. You know that it will handle most anything else you throw at it!
TIGHTEN/LOOSEN THE SPRING PRELOAD UNTIL YOU ARE ABLE TO MOVE THE SPRING WITHIN ITS RETAINER, OR ADJUSTER, WITH MODERATE FORCE. IF ITS VERY HARD TO GET THE SPRING TO SLIP BY HAND THE PRELOAD IS TOO TIGHT. IF ITS VERY EASY ITS TOO LOOSE. THIS IS YOUR BASELINE RELATIVE TO YOUR LIMITER STRAP SETTING
LIMITER STRAP SETTINGS MUST BE ADJUSTED WITH CARE. THIS ALONE WILL CAUSE TOO MUCH OR TOO LITTLE SKI PRESSUE RESULTING IN LOSS OF CONTROL OF THE MACHINE OR TOO HEAVY STEERING.

RIDER WIEGHT, STUDS, ETC ALL PLAY A ROLE IN YOUR STEERING and limiter settings.

in general, with the front ski's on the ground, lift the rear of the sled so the track about a 1/4 inch off the ground. the track should consistently 1/4 inch all the way. not front high, or rear high. this will give you a true neutral set up. not to much ski pressure, or to little. just a nice balanced setup.

REAR STATIC & RIDER SAG

TO SET STATIC SAG THE MACHINE MUST BE FLAT ON THE GROUND WITH NO RIDER ON MACHINE. LIFT UP ON THE REAR BUMPER UNTIL IT LOCKS, MEASURE TO THE BUMPER FROM THE GROUND, LET GO. THE MACHINE SHOULD SAG NO MORE THAN 2" UNDER ITS OWN WEIGHT.
IF IT GOES 3 OR 4, GO UP 1 CLICK ON THE REAR TORSION SPRING ADJUSTER, REMEASURE. 1" SAG TO 2" IS GREAT! NOW SIT ON THE MACHINE, THE MACHINE SHOULD SAG NO MORE THAN +4" OF YOUR INITIAL MEASUREMENT. IF IT’S MORE THAN THAT THEN INCREASE SPRING PRELOAD TO ACHIEVE PROPER SAG WITH RIDER SITTING ON MACHINE.

TUNING NOTES OF INTEREST TOO MUCH SKI SPRING PRELOAD WILL CREATE A HARSH RIDE THROUGH THE HANDLEBARS,TOO LITTLE AND BODY ROLL WILL OCCURR

TOO MUCH CENTER SPRING PRELOAD AND THE RIDE WILL BE HARSH IN YOUR MIDSECTION,TOO LITTLE AND THE FRONT END WILL BE HEAVY TO STEER AND THE SHOCK MAY BOTTOM OUT. THINK OF YOUR CENTER SHOCK AS THE FULCRUM POINT OF A SEE- SAW.

TOO MUCH REAR TORSION PRELOAD AND THE RIDE WILL BUCK YOU OFF THE SEAT! TOO LITTLE AND YOU WILL BLOW THROUGH THE AVAILABLE TRAVEL IN YOUR SUSPENSION

IF YOU HAVE SAG SET CORRECTLY, AND YOUR STILL BOTTOMING OUT, YOU DO NOT NEED STIFFER SPRINGS. ALL SPRINGS DO IS HOLD UP YOUR WEIGHT. YOU WOULD NEED TO GET CORRECT VALVING ON YOUR SHOCKS FOR YOUR RIDER WEIGHT AND RIDING STYLE.

99 zrt 800
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