hey i just bought my cbr1000rr this week great bike but not much low end power. but i will say after it hits 3000rpm its crazy fast. im tryin to improve on that i was just thinkin bout changing the rear sprocket. i was wondering if anyone had any input on what size... i heard 42 in the rear would be a good choice... or should i just get a 520 conversion,

 

I haven't done any gearing changes to my bike but I have seen some threads about going to a 42 or 43 rear, but if you are looking for stand up off of idle low-end power, go down 1 on the countershaft sprocket. I think that the comparison is, if I remember correctly, going down one tooth on the counter is like going up four points on the rear. Typically, at least from my motocrosser and go-karting experiences, going down one on the front will give you killer acceleration. All depends what you are looking for. You say that you like how it pulls from 3k on so you may not want to give that up. Let's see if anyone else puts their two cents in.

 

Went with a 43 on the rear and can't say why I didn't do it sooner......I love the diff it makes, it's huge! Pulls like a BIOTCH!!!!!!

 

16T Front (Standard) with 42T Rear for the Street, and 46T Rear for the Track.

 

hey guys thanks for the input... i decided to get a 42 and see how i like it..... i should be getttin it this thrusday.

 

Good choice the good thingabout that also is you don`t have to add or loose any links from the chain

 

If you do express way riding I would recommend a 42 rear (stock is 41). I changed to a 42 and am happy with it - allow the bile to run at approx 5K RPM at 80-ish.

 

i thought stock was 40.. or at least thats what the store i bought it from said.... also wont i need to get a speed healer... and if so where and what brand would be a good one...... i will say i rode a 01zx9r last year and never again.. cbr now on..

 

Yep, you'll need a Speedohealer, not so much for the speedo but rather the odo that will be over stating your mileage. Find your nearest dealer at www.speedohealer.com or click on the link on the banner that pops up in these forums

 

i went down one in front and did the speed healer 15.00 usd for the sprocket from dealer and started using qmi in the fuel WOOOOOW