The Stock RMK is 40" centered on the spacers 39" - 40" - 41" by moving the spacers.
The ARS-FX (Z broz) are 40" centered on the spacers. and will go 39" - 40" - 41"
The Holz is 41 centered on the spacers and will go 40" - 41" - 42"
I run the Holz in the 40" position and really like them.
None of the A-arms change the geometry of the front end.. they make it lighter and tougher and I beieve will turn 1 or 2 degrees sharper than stock.
Don't look for any change in handling other than dropping some unsprung weight from the sled by using ANY of the aftermarket a-arms.
If you want to improve the handling... change out to the 2009 swaybar setup which should be possible and still keep the stock fenders.. your would need to cut some holes for it. It also drops some weight AND works much more smoothly.
Improvements in handling will come from improving your shocks and sway and spindles.
The spindles on the 07 RMK are the same as the 2006's. The 2008/09 spindles were a big improvement as far a steering effort.. the new factory spindles on the RMK's are near the geometry Holz/ARS spindles... the 09 Dragon/Assault spindles are about the same weight as the aftermarket ones... the Holz being the lighter of the two (the Holz A-arms are also slightly lighter than the ARS-FX)
In short, If you want your sled to handle well next season... pull off your Current A-arms... sell what is good... put the money into the Arms you like best (Timbersled, Holz, ARS-FX,Fabcraft, Alternative impact) , upgrade the spindles to the aftermarket parts or 2009 Dragon....
I think that Curt at FasTrax can help you with getting a 2009 swaybar into your 2005-2008 front bodywork....Parts and labor (if local)
Pull your shocks front and rear and send them into FasTrax for service and upgrade on the valving... They will check them for damage, upgrade the valving, change the oil and re-pressurize them...
Do all of this before September and you will not get caught up in the pre-season rush and have to wait.
Be
SUPER CAREFULL when removing the front shocks... Cover the shafts with foam pipe insulation when removing them... The shafts will nick VERY easily if you even bump them on removal.
When going back on with them... I recommend using the Skinz Protective Gear neoprene shock boots on the ski shocks to protect your investment and keep them performing up to snuff.
Maybe Curt from
www.fastraxmotorsports.com will chime in here on the shock upgrades??