HOW MUCH WEIGHT DOES IT ADD ? BARRING ANY EXTERNAL DAMAGE BY RIDER HOW LONG HAVE THESE MODS LASTED?  CAN i DO 10 - 50 ENDUROS ? IS THIS BETTER UTILIZED ON A SMALLER BIKE? DOES IT USE MUCH HP ?   i'M 210 48 YRS OLD very experianced but not enough points to move up "C" rider.   Are the any dealers on the west coast ?