garync1

Ok here Is the bike I have below, same color and components. Want to up grade to lighter but the cheapest as I can. Such as front Forks and crank and derailleurs.. Keep in mind I was once riding a Mongoose XR 100 from Wal-mart and it worked just fine. But The Yukon FX Rides far better of course.. Just want lighter low cost but reliable upgrades. Would not mind turning it up from a 24 speed to 27 speed if that would be easier to locate better but low cost parts. This is what I have now and I am keeping mine Hayes brakes. They are far better than what I had in the past.. Here are my specs.
size 14.5(XS),15(S),17(M),19(L) 21(XL)
color Blue/White
frame ALUXX-Grade Butted Aluminum, 4" Suspension
fork RockShox Dart 2 w/Lockout, 100mm travel
shock Giant Air
handlebar Giant Connect, high rise 31.8mm
stem Giant Connect
seatpost Giant Connect Alloy 350x30.9mm
saddle Giant Performance MTB
pedals Alloy Platform
shifters SRAM X4, trigger
front derailleur SRAM X7, trigger
rear derailleur SRAM X4
brakes Hayes MX-4 Disc
brake levers Tektro Alloy, 2-Finger
cassette SRAM PG830 11-28, 8-speed
chain KMC Z72
cranks TruVative ISO Flow 3.0, 22/32/42
bb Cartridge
rims Giant XC Alloy, Double Wall
hubs Formula 32H
spokes Stainless Steel
tires Kenda Nevegal 26 x 2.1"

Thanks for any help.. Would like to spend about 400.00 at the most.. Any advice would be helpful. Thanks.