How is the te450 like 20 lbs fat

Where is the weight in a 08 te 450 , like the extra weight. Like the shave-able LBS, It is 19 to 21 LBS overweight it seems, Where is all of the weight Hiding?
Swing arm,wheels,sub frame, or just the whole dam frame

E-start with the battery are probably the biggest "non-essential" offenders, but there are things that be removed to save a little weight. Turn signals, factory taillight/mud guard with extra subframe, chain guard, horn, left side handle bar switch (if you can live without high beams), smog canister with related hoses/brackets, and mirrors to name a few. Now after doing this your bike may not be technically road legal and your not going to get 20 lbs out of all that stuff, maybe 5lbs or so?

The pilot is often carrying a couple of extra pounds that easily can be removed

ha ha ha, thanks to the winter, and a stunning back injury "fell off bike , Lower back hit rocks" I have gained a few extra lbs,
The battery is almost 5 lbs by itself, feels like anyways.. I think that 20 lbs of weight loss might be possible

It's a pig...a 285+ pound pig! That being said it carries it's weight very well in single track and only becomes a complete bastard in really technical sections. Fast single track, two track, quad trails, jeep trails and desert = UNBELIEVABLE. The easiest way I lost weight was to upgrade my 2008 TE 450 for a 2009 TXC 250. I lost 35 lbs overnight!

Upgrade your battery to a Turntech Lithium battery. Get rid of the kickstand. Replace the stock muffler with the power-up Arrow muffler and race license plate holder. Have someone machine the flywheel much much lighter. Take off the kickstarter and internal motor components associated. I'm sure the wiring harness weighs a ton. Wait a minute...that's a TXC.

yean the tecnical stuff, rapes my back on the 450, but I still pown, when it starts tracking streight

Got that already

Weigh your battery, e start, and street harness. There is your 20lbs pounds. The KTM EXC, Yamaha WR, and CRF "X" are not appreciably lighter. 21lbs overweight compared to what? Trying to lose 20lbs on any of those bikes and the TE isnt possible unless you remove all the stuff that makes it a TE and not the TC (ie motocross bike).