I have an 06 1k. I bent the rim and had to get a new one. I got one off of ebay for a good price and it was straight with no defects.
Well it came with the rear rotor & rear sprocket + bearings. I was cleaning up my sprocket of off my bike and noticed that it was a 42 tooth sprocket.
The one that came on the eBay rim is a 41 tooth sprocket.

I am wondering which would be better for my bike? & Why?
And if the 41 tooth is better will I need to change my Chain or Front Sprocket?

 

that is classified as one down in front, you will not have to change your chain.. goin down in the back will give u a tad more top end.. dont worry about it you are fine.

 

it will also take away some bottom end, but one tooth in the rear isn't much. I think 1 tooth up front is like 3-4 teeth in the rear huh? Speaking of teeth, I just orderd my -1 front sprocket! Weeee!

 

ya something like that.. you wont notice much with -1 in rear, dont worry about it.. -1 is front makes more of a differences......

torque ---- go down in front and up in rear.....

speed ------ go up in front and down in rear

 

So I will put the 42 on the wheel not the 41!
Thanks guys for the info!