Gearing Changes for R6?? - Sportbike Forum: Sportbike Motorcycle Forums
 
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post #1 of 10 (permalink) Old 01-11-2003, 05:25 PM Thread Starter
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Gearing Changes for R6??

Ok, so who's done it and what have you done. If I still have my bike this spring I was going to go down one tooth on the front seems how the sproclet is only like $25. If I were to keep her however I was going to go down 1 up front and up 3 in the rear. Has anyone done something similar or anythign more radical? Considering I never hit more that say 150 on the speedo now, what gearing can I realistically change to and still be able to go this speed. I've had it up to an indicated 172 with the stock gearing which I'd venture to guess to be actually around 157 or so. I basically want an explosive low end to burn out of the corners, and to make wheelies easier. lol

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post #2 of 10 (permalink) Old 01-12-2003, 03:52 PM
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I believe the stock sprockets are 15/45, so -1/+3 would be a 14% change. Definitely a lot more torque, but also a lot more revs. To get an idea how much revvier, try cruising in 5th gear. The 5th/6th gap is probably less than 14%, so your proposed change would put cruising revs slightly higher than you'd see in 5th with stock sprockets. And top speed would be slightly less than you'd see at redline in 5th.
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post #3 of 10 (permalink) Old 01-13-2003, 07:45 AM Thread Starter
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Sweet!! That means it's very doable, I rarely tap out 5th now so maybe I'll be using 6th alot more. I'd still like to hear about any gearing changes anyone has actually done to their R6 and how they liked it though. THanks alot for taking the time to figure that out for me, math was never my strongpoint. Hopefully it'll pull like an R1 out of the corners after this.

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post #4 of 10 (permalink) Old 01-13-2003, 07:54 AM Thread Starter
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Hold up, I just thought of something. The stock gearing is 16/48. I don't really want to do the 520 conversion right now, so am I going to be able to use my stock chain when I go -1 front +3 rear??? Probably end up having to move the wheel slightly more forward wont I?

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post #5 of 10 (permalink) Old 01-13-2003, 09:57 AM
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Quote:
Originally posted by Doogie
Hold up, I just thought of something. The stock gearing is 16/48. I don't really want to do the 520 conversion right now, so am I going to be able to use my stock chain when I go -1 front +3 rear??? Probably end up having to move the wheel slightly more forward wont I?
Oops. I looked at an old road test, which was obviously wrong. I shoulda looked at Yamaha's website, which shows 16/48. The math doesn't change much; torque increase will be 13% instead of 14%.

With a net change of 2 teeth, you may need to replace the chain, but it depends on how much adjustment you have. In theory, you'll need to adjust the axle forward by 5/8 inch.

For info, going -1/+2 would still be decent, producing an 11% torque increase over stock (about the same as the 5th/6th-gear spread, but would require only 5/16in forward adjustment.
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post #6 of 10 (permalink) Old 01-13-2003, 02:50 PM
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If you change sprockets, you'll most likely have to change the chain as well. The R6 stock chain is a 532 (WTF?!?!) so unless you order a different sprocket from yamaha you'll have to convert.

BOT, I went 4 up in the rear, and it's a lot quicker. true, the revs go up and the speedo is even less acurate, but WHO CARES!!! I bought it to ride it!!!

1 down in the front and 3 up in the rear will be plenty for one change. Good luck!!

E~

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post #7 of 10 (permalink) Old 01-13-2003, 06:45 PM
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I too reccomend replacing the chain along with the sprokets. Not only is there a difference in thickness but also a difference in wear pattern. The chain and sprokets mold into each other over time.

I reccomend the DID Gold X-Ring chain (520)


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post #8 of 10 (permalink) Old 01-13-2003, 06:50 PM
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...

I also wanted to mention that going down one in front is almost equivalent to 2 or 3 in the rear. So if you proceed with your proposed plan you will going up around 5 or 6 teeth in the rear. This will be quite a difference and may be an undesireable change.


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post #9 of 10 (permalink) Old 01-14-2003, 06:55 AM Thread Starter
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Forgot about that weird ass 532 chain. Sprocket specialists makes a front sprocket for it so maybe I'll just swap that out first and see if I still want more acceleration. I know most people just go down one in the front or up three in the rear so my plan probably will be a little too much on anything other than really tight twisties.

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post #10 of 10 (permalink) Old 03-16-2003, 04:47 AM
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I went 16/50. Made a nice little change in accel on the 00 I used to have.
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