if you do a few things like...
--225lb front track spring
--shed as much weight off as possible (stock pipe/can, remove radiator)
--get some holz or 08-up dragon spindles
--better shocks
it will handle fairly decent. my wife loves her sled, sure its heavy for her, but it will smoke any NA 700 on the market
then do the essentials
--check throttle body boots
--check motor mounts
--FBF throttle/oiler cable
--19/42 gearing
--proper clutching
--balance the primary
--ONLY run the 3211115 belt with proper clutch shimming and belt deflection
and a few of the small tricks here and there, that sled will be great and last you along time...
i personally am a HUGE fan of these sleds, and will never talk them down, they have HUGE amounts of torque...both in the 700/900 sleds from 05-06
ride on!!
we are here to help if you need it.