I have a 2005 CBR600F4i. Stock is 525 chain with 16-teeth front sprocket & 46-teeth rear sprocket. I'm replacing my sprocket/chain set-up to the following:
D.I.D X-Ring Chain (520VM) - 120 Links. Planning to purchase at www.cal-sportbike.com
for $104.99 (w/o shipping or tax). Reference: www.didchain.com/specs.htm
Vortex520 Gold Rear Sprocket (Cat5) - 48 teeth. Planning to purchase direct at www.vortexracing.com/index.php?src=directory&srctype=display&id=2412&view=Products_detail
for $70.95 (w/o shipping or tax).
Vortex 520 Front Sprocket (3273)- 16 teeth. Planning to purchase direct at www.vortexracing.com/index.php?class0_0=419&class0_1=442&class0_2=857&class0_3=858&xsearch_id=products_search1&src=directory&view=Products&submenu=&submit.x=5&submit.y=9
for $33.95 (w/o shipping or tax).
My reasoning for purchasing theseitems:
Chain: D.I.D sounds like the best/better quality, and since I'm changing to a smaller chain (520 vs. 525 stock), I want to make sure I get the best/better quality. It's a gold-colored chain which will match nicely with the gold rear sprocket. Btw, I have a silver/graybike. Also, although I'm guessing a minor performance difference, the weight is well over 1/2 pound lighter for a 520 vs. a 525. Perhaps it is more significant considering rotating mass. Lastly, price is less for a 520 vs. a 525.
Sprocket: Vortex, again sounds like the best/better quality, and they have a huge range of teeth sizes. It's a gold-colored sprocket, matching nicely with the gold chain. I'm going with a 48-teeth rear sprocket to increase lower-end power, but keeping with a 16-teeth front sprocket (stock teeth count). I'm choosing the 16/48 combo as a middle ground for what most people seem to be choosing, which is 15/48. I'm also just changing only the rear because I believe there will be less wear on a chain by only "upsizing"the rear sprocket, instead of"downsizing" the front. Seems to me that a larger rear-sprocketwill cause less wear than a small front-sprocket. Btw, I found a great Excel spreadsheet that shows the speed difference when changing sprocket sizes (Click Here
). Lastly, I am changing both front and rear sprockets because I feel I should when a new chain is installed (btw, current chain is stock and has rust stains with 3600 miles on it - poor maintenance by prior owner?).
Any comments, thoughts would be appreciated.