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Old July 20th, 2010, 08:09 AM   #1
road_rascal
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Replacing front sprocket only

I want to replace the stock 14T sprocket with a new 15T sprocket. But I want to keep the original chain and rear sprocket. The bike only has 3500 miles on it (2004). Will this cause a wear problem with the chain long term? On my other chain drive bikes I have replaced the front and rear along with a new chain when they're worn out. Thanks.
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Old July 20th, 2010, 08:29 AM   #2
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Originally Posted by road_rascal View Post
I want to replace the stock 14T sprocket with a new 15T sprocket. But I want to keep the original chain and rear sprocket. The bike only has 3500 miles on it (2004). Will this cause a wear problem with the chain long term? On my other chain drive bikes I have replaced the front and rear along with a new chain when they're worn out. Thanks.

I'm gonna say you will be fine. Yes normally if you are replacing a worn part in the drive-line, you would replace the chain and both sprockets.
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Old July 20th, 2010, 08:33 AM   #3
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Quote:
Originally Posted by road_rascal View Post
I want to replace the stock 14T sprocket with a new 15T sprocket. But I want to keep the original chain and rear sprocket. The bike only has 3500 miles on it (2004). Will this cause a wear problem with the chain long term? On my other chain drive bikes I have replaced the front and rear along with a new chain when they're worn out. Thanks.
With only 3500 miles on the sprocket, i wouldn't worry about it. You are changing it because you want to change the gear ratio, not because it is worn.

When you need to change the chain and rear sprocket later, i would throw in a new front sprocket again. But that is many many miles away.
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Old July 20th, 2010, 08:37 AM   #4
road_rascal
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That's what I thought. Thanks for the fast replies. The front sprocket was only $16 so when the chain is worn out I'll get a new front and rear.
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Old July 20th, 2010, 08:43 AM   #5
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That's what I thought. Thanks for the fast replies. The front sprocket was only $16 so when the chain is worn out I'll get a new front and rear.
Yep, yep... Here's some additional info if you need it. I liked the improvement the 15T provided for both my 08 & 09 Special edition. I think you'll like it too for your pre-gen. GL

http://www.ninjette.org/forums/showthread.php?t=10273
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Old May 29th, 2011, 03:24 AM   #6
Turtle
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I replaced my Wifes Front Sprocket with a 15T as well, I did it because of the RPM's she was getting in the lower gears. Guess what, I cut the RPM's in half and did not effect the gas milage or the handling of the bike at all now it rides as it should. As for the Chain No ya dont need to replae it YET. But some day you may wish to but as stated before not to worry now.
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Old May 29th, 2011, 03:41 AM   #7
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The 15t is the best mod to do on the lil Ninjette...
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Old May 29th, 2011, 06:56 AM   #8
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I replaced my Wifes Front Sprocket with a 15T as well, I did it because of the RPM's she was getting in the lower gears. Guess what, I cut the RPM's in half
No, you cut the RPM's to 14/15ths of what they were before.
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