Right Sprockets?

billybobjoeiv · May 6th, 2010, 12:34 PM

Hey,
Relatively new to riding and have to ride the bike up from college (FL) to home (OH). i did a 1100 mile trip earlier this year but didnt like the high RPMs so im switching the sprockets. Ive got a million things going on though at the moment and havent had much time for research on which ones to buy. Ive found these two though. Will these work for replacing the stock sprockets without replacing the chain? 15T front sprocket and 43T Rear.

http://www.motorcycle-superstore.com...50R-Parts.aspx
http://www.motorcycle-superstore.com...50R-Parts.aspx

Thanks much!

billybobjoeiv · May 6th, 2010, 12:42 PM

wow im tired.....

put it in the wrong year's forums. can i get this moved to -2007? haha...

Alex · May 8th, 2010, 06:45 PM

/moved to pregen tech

longhorn · May 28th, 2010, 04:53 PM

You can go to 15/41 with the stock 106 link chain. If you go to 15/38 you need a 104. I just did 15/41 and it works real fine. Just going to 43 is not really worth the effort. Remember 1 at the front = about 3 at the back.

03slime250 · May 28th, 2010, 09:31 PM

whats the difference in changing only one or the other?

longhorn · May 28th, 2010, 11:28 PM

If you want find all the effects of changing sprockets go to "gearingcommander.com" and look up Kawasaki/ZZR/250-YEAR. It will give you all you will ever want to know, and more, about the effects of sprocket changes. Simply put: one tooth at the front lowers the gearing about 7% and 3 at the back by another 7% for a total of about 15%. This drops your revs at 60mph by about 1,100 - which is like having another whole gear above 6th. Of course the gaps between the gears are a bit bigger so it won't accelerate quite so fast but I don't notice it, and it makes 1st quite a bit more useable. I found my gas consumption went from about 70 to 78 ish mpg, but I am under 120# and ride like an old lady.

billybobjoeiv · May 29th, 2010, 12:01 AM

ended up going with the 43 in the back. probably should have just done the 41, but i was worried about getting up hills without too much effort. im 195#. oh well. i like it. not screaming as loudly down the highway. although, the one time i tried it, i couldnt get it past 11ish thousand rpms in 6th on the highway. not enough power i guess with the sprocket change. at least on flat ground

longhorn · May 29th, 2010, 09:30 AM

Your 5th is now the same as the stock 6th! Try WOT in 5th and see how it goes, 13,000 rpm should give you about 105.6 mph true, if you can get there.

billybobjoeiv · May 29th, 2010, 02:15 PM

im not sure whats up with my bike. before the sprocket change, i could only get it to go up to 101 mph indicated, which is even less in true, at redline. what could the problem be?

Alex · May 29th, 2010, 02:29 PM

Not a problem, that sounds about right.

billybobjoeiv · May 30th, 2010, 04:59 PM

oh ok, thanks!

May 6th, 2010, 12:34 PM	#1
billybobjoeiv ninjette.org member Name: Nathan Location: Mason, OH Join Date: Apr 2010 Motorcycle(s): 2005 Kawasaki Ninja 250 Posts: 52	Right Sprockets? Hey, Relatively new to riding and have to ride the bike up from college (FL) to home (OH). i did a 1100 mile trip earlier this year but didnt like the high RPMs so im switching the sprockets. Ive got a million things going on though at the moment and havent had much time for research on which ones to buy. Ive found these two though. Will these work for replacing the stock sprockets without replacing the chain? 15T front sprocket and 43T Rear. http://www.motorcycle-superstore.com...50R-Parts.aspx http://www.motorcycle-superstore.com...50R-Parts.aspx Thanks much!

May 8th, 2010, 06:45 PM	#3
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	/moved to pregen tech __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

May 28th, 2010, 04:53 PM	#4
longhorn ninjette.org member Name: Nick Location: Tucson Join Date: May 2010 Motorcycle(s): 2009 Ninja 250R Posts: 20	Sprocket Change You can go to 15/41 with the stock 106 link chain. If you go to 15/38 you need a 104. I just did 15/41 and it works real fine. Just going to 43 is not really worth the effort. Remember 1 at the front = about 3 at the back.

May 28th, 2010, 11:28 PM	#6
longhorn ninjette.org member Name: Nick Location: Tucson Join Date: May 2010 Motorcycle(s): 2009 Ninja 250R Posts: 20	Sprocket Change Effects If you want find all the effects of changing sprockets go to "gearingcommander.com" and look up Kawasaki/ZZR/250-YEAR. It will give you all you will ever want to know, and more, about the effects of sprocket changes. Simply put: one tooth at the front lowers the gearing about 7% and 3 at the back by another 7% for a total of about 15%. This drops your revs at 60mph by about 1,100 - which is like having another whole gear above 6th. Of course the gaps between the gears are a bit bigger so it won't accelerate quite so fast but I don't notice it, and it makes 1st quite a bit more useable. I found my gas consumption went from about 70 to 78 ish mpg, but I am under 120# and ride like an old lady.

May 29th, 2010, 09:30 AM	#8
longhorn ninjette.org member Name: Nick Location: Tucson Join Date: May 2010 Motorcycle(s): 2009 Ninja 250R Posts: 20	Right Sprockets Your 5th is now the same as the stock 6th! Try WOT in 5th and see how it goes, 13,000 rpm should give you about 105.6 mph true, if you can get there.

May 6th, 2010, 12:42 PM	#2
billybobjoeiv ninjette.org member Name: Nathan Location: Mason, OH Join Date: Apr 2010 Motorcycle(s): 2005 Kawasaki Ninja 250 Posts: 52	wow im tired..... put it in the wrong year's forums. can i get this moved to -2007? haha...

May 28th, 2010, 09:31 PM	#5
03slime250 ninjette.org member Name: dakota Location: northwest arkansas Join Date: May 2010 Motorcycle(s): 2003 ninja 250 Posts: 61	whats the difference in changing only one or the other?

May 29th, 2010, 12:01 AM	#7
billybobjoeiv ninjette.org member Name: Nathan Location: Mason, OH Join Date: Apr 2010 Motorcycle(s): 2005 Kawasaki Ninja 250 Posts: 52	ended up going with the 43 in the back. probably should have just done the 41, but i was worried about getting up hills without too much effort. im 195#. oh well. i like it. not screaming as loudly down the highway. although, the one time i tried it, i couldnt get it past 11ish thousand rpms in 6th on the highway. not enough power i guess with the sprocket change. at least on flat ground

May 29th, 2010, 02:15 PM	#9
billybobjoeiv ninjette.org member Name: Nathan Location: Mason, OH Join Date: Apr 2010 Motorcycle(s): 2005 Kawasaki Ninja 250 Posts: 52	im not sure whats up with my bike. before the sprocket change, i could only get it to go up to 101 mph indicated, which is even less in true, at redline. what could the problem be?

May 29th, 2010, 02:29 PM	#10
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	Not a problem, that sounds about right. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

May 30th, 2010, 04:59 PM	#11
billybobjoeiv ninjette.org member Name: Nathan Location: Mason, OH Join Date: Apr 2010 Motorcycle(s): 2005 Kawasaki Ninja 250 Posts: 52	oh ok, thanks!

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