Losing weight on my S2R

[uclabiker06]

You, might as well sell your bike and get one of these.  

http://www.ncrfactory.com/eng/html/15.00.shtml

Can't believe that NCR848 costs as much if not more than a Desmosedici!

[duc996]

CF wheels 

[Raux]

how much weight savings would be belt drive from a buell?

[KLRDuc]

What do YOU weigh?  It's probably easier and cheaper.

[junior varsity]

As Mark posted, there are some big dollar "firsties" to get the weight down.

Here's the ones I find to be significant:

Lighten/balance crank + titanium con-rods.
Lighten flywheel or nichols flywheel
Lighten clutch internals
Lighten primary/driven gear, oil pump gear, timing gear, timing belt pulleys, sprag gear
Magnesium engine side cases, carbon fiber valve inspection covers (NCR)
Wheels (forged mag or cf)
Select a lightweight tire
Lighten rotors, billet calipers (ti caliper pistons)


Note: 25mm cartridge kits are heavier than 20mm cartridge kits. (And arguably worse performing, see: http://www.traxxion.com/20mmvs25mmcartridge.aspx)

CF/Kevlar tank, front mudguard, remove rear mudguard, Ti shock spring, carbon fiber or ti steering damper (or remove it).

Replace most non-structural bolts with aluminum.

Remove starter, and alternator 

[ducrider45]

With all of the parts listed here and the amount of work involved you are well over 30K in parts alone. Labor is at least that much if you are not able to do all of this work yourself.  enjoy the bike as is.

[Raux]

so $40k+
hmmm another 10-30 depending on condition and you can have a D16

[Popeye the Sailor]

If you people bring rationality into modding you'd never bother in the first place.

[Goat_Herder]

If you people bring rationality into modding you'd never bother in the first place.

I would agree on principle.  But perhaps the goal of < 300lb is too ambitious, given the time/money/engergy required. 

[junior varsity]

If I was going for your goal of lightening the bike, without regard to some arbitrary # goal, I'd focus on some key areas such as wheels, tires, rotors, rotor/caliper bolts, calipers, axles.

You can find titanium front axles, rotor bolts, caliper bolts, and rear rotors.
You can find lightweight aluminum rotor carriers for the front, billet calipers
You can find magnesium or carbon fiber wheels and choose tires carefully.

If you were on a superbike, I'd say a mag swingarm and eccentric hub. I suppose billet fork bottoms are lighter than the cast ones.

[hackers2r]

So the upcoming mods are the following:

LW battery
LW flywheel
LW belt rollers

Have a question regarding the flywheel.  Anyone have experience with either the Nichols or DP product?  What are opinions?  They are about the same price.  Also notice that Nichols has bolts for this as well.  Are these needed?  Thanks.

The brakes and wheels are coming later this summer.

[pennyrobber]

I have looked some into the flywheel and there are probably several threads on the matter. I decided to go with machining my stock flywheel (via Ducshop). I have heard stories of the aluminum flywheels having there spines destroyed. No first hand experience but enough risk to help my decision.

[He Man]

Why remove the rightside front disc brakesetup? thats like 5lbs right there.

rear brakes gotta be another 3lbs.

run the bike low on gas, thats another 5lb.

im only partially kidding. 

[junior varsity]

if you are fast enough, you can take the entire front wheel off.

[He Man]

if you are fast enough, you can take the entire front wheel off.

Well if your going to do that, then you might need the rear brake.