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post #1 of 6 (permalink) Old 05-15-2007, 05:08 PM Thread Starter
 
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Sprocket Questions

Ok , here goes....
I got a 1996 gsxr 750, i wanted to upgrade the chain and sprockets at the same time. So i went to my local stealership and got the Rk quick acceleration sprocket and chain kit for my year bike. after taking off all parts and back sprocket i notice that this sprocket isnt gonna fit. the stock sprocket bolt size is different and the hole in the center is much larger than the one i just took off. Ok i go back to the stealership and question this, they called vortex and ran part number from old rear sprocket and said it was a special order because i have PM Wheels (Performance machine) rims. After talking to vortex myself i asked for a quick acceleration kit and he told me i would need a 46 in the rear because i have 16 in the front.. Stock is 16/43 and the Q/A kit was 15/43, he said trust me.. IS THIS GUY RIGHT???? 16/46 ???? i just hope he was throwing some **** in my ear just so i buy.. DID i make the right choice? any help would be appreciated....
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post #2 of 6 (permalink) Old 05-15-2007, 06:04 PM
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i think the rule of thumb is 2 or 3 teeth up on the rear is about equal to 1 down on the front. some people say that droppin one on the fronts is bad anyway b/c it multiplies the torque off the sprocket shaft, causing more wear.. i myself have -1 and +2 so im not the perfect
hope it helps

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post #3 of 6 (permalink) Old 05-15-2007, 10:52 PM
 
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Quote:
Originally Posted by Xxgsxr750xX View Post
Ok , here goes....
I got a 1996 gsxr 750, i wanted to upgrade the chain and sprockets at the same time. So i went to my local stealership and got the Rk quick acceleration sprocket and chain kit for my year bike. after taking off all parts and back sprocket i notice that this sprocket isnt gonna fit. the stock sprocket bolt size is different and the hole in the center is much larger than the one i just took off. Ok i go back to the stealership and question this, they called vortex and ran part number from old rear sprocket and said it was a special order because i have PM Wheels (Performance machine) rims. After talking to vortex myself i asked for a quick acceleration kit and he told me i would need a 46 in the rear because i have 16 in the front.. Stock is 16/43 and the Q/A kit was 15/43, he said trust me.. IS THIS GUY RIGHT???? 16/46 ???? i just hope he was throwing some **** in my ear just so i buy.. DID i make the right choice? any help would be appreciated....

If you know much about cars it can be transfered to bikes. If you have a car with a 3.73 rear end gear ratio and you go to a 4.11 ratio you increase the acceleration and you decrease your top speed correct.. Same thing with a bike if you take your rear sprocket teeth # and divide it by the front teeth # then you get your final drive ratio. So with this logic then your stock is 43/16 = 2.6875 the 46/16 = 2.875 and the 43/15 = 2.8667 so the 46/16 combo is a tiny bit quicker acceleration than the 43/15. Also if you take the stock ratio compaired to the new ratio you are buying you can figure our the % change. The 46/16 has a 6.9% increase in torque compaired to stock. In simple terms. this is the way I look at things anyways

I would say go for it and if you still feel like you need more go to the 15 front as well. Just be sure if you have to cut the chain that you adjust it close to the engine so you have room for chain stretch and if you decide to get the 15 front then you have room to adjust your chain back.

Hope this helps and not confuses you
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post #4 of 6 (permalink) Old 05-15-2007, 10:59 PM Thread Starter
 
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no man, that just explained it all.. i am glad TWF has good knowlegable people like yourself. i really appreciated your help.
thanks
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post #5 of 6 (permalink) Old 05-15-2007, 11:04 PM
 
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I'm still new here and kinda new to bikes but I've been racing all sorts of things since I was a kid and that was one of the first things my dad taught me. Thanks for the kind remarks!

Good luck
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post #6 of 6 (permalink) Old 05-15-2007, 11:04 PM
 
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The +3 rear will do the same thing for you as the -1 front.



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