A good high flowing exhaust for drag racing(Brocks)can give you 8-10hp, 4-6 lb ft torque, ballpark numbers, give or take.
The bike will be better throughout the rpms with a GOOD dyno tune.
Another big gain is that the stock exhaust weighs around 38 lbs, and something like a Brocks Alienhead will be around a third or less of that.
You also get rid of the catalytic converter with any full system, which is great, because that thing will cook you're feet in the summer.
For $2k, and drag racing, Brocks Alienhead with a Power Commander loaded with Brocks map.
Brocks Power Commander maps are the only base maps that are any good. Because he made them from his dyno tunes.
Any other PC base map besides Brocks is almost always junk, and you will notice no improvement.
A GOOD dyno tune can improve things from there. But it's about driveability throughout the rpms. Another hp at peak rpms is great...but you'll never feel it.
An ecu flash will help too.
Speedohealer will fix the speedometer, and sprockets can be swapped until you find what you like.
A -1 front, a +3 rear, seperate or combined will fit the stock length chain.
All can be had for under $2k.
If it's a drag only bike, it'll be ok. If you street ride, you need new fork springs at 270lbs. The bike will never handle as it should without them.
Suspension sag is the key to handling.
Brakes! New brake pads! EBC HH "Extreme Pro" pads. The Extreme Pro are different from the regular HH. They are ceramic embedded, and they Will stop you sooner! Stainless steel brake lines won't stop you sooner, but they really improve brake feel.
If you street ride, I'de do brakes and suspension first, then add some power and lose the heavy exhaust.
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