decreasing unsprung weight is always a good idea. I'm not sure of the stock wheel weights for the 1000RR. So the delta involved in the weight difference and the weight loss on the outside of the wheel would improve the handling remarkably...
Try LDH's site over at rogue racing or rc51.org, I know he had some wheel weight info there...
For the weight difference you might as well get the "Y" spoke.
This is from 1000RR.net:
So I finally started wrenching my 1000RR in preparation for upcoming track season. Since I was taking the bike apart I though I'd put some parts into scale as there has been a lot of discussion on where one can save weight and how much this and that weights.
So here we go
Front wheel: 4000 g (without disks, bearings installed)
Rear wheel: 5500 g (without disk, bearings installed)
Chain: 2400 g
Swingarm: 7280 grams
Shock: 2780 grams (in comparison my WP shock weight 2920 grams, but that is with remote preload adjuster)
OEM rear sprocket (530/40): 540 g, my 520/42 alu Renthal is 240 g
OEM Battery: 2900 g
OEM rear brake disk: 800 grams
OEM exhaust: header 4750 grams, muffler+valve 4800 grams, heat shield 500 grams
OEM Clipons: 330 grams each
The OEM wheels seems to be quite light, when compared with for example PVM forged alu aftermarket stuff: PVMs are 3500 and 5000 grams, so only a total of 1000 grams gets saved. Forged mags are a different story, PVM's are around 2000 g front and 3000 g rear. As a side note RC51 front is 4770 grams.
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