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post #1 of 20 Old 04-11-2012, 3:34 AM Thread Starter
 
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Changing sprocket size

I have been riding my 01 929 with a 44 rear sprocket and stock front, but the back lost a tooth and others thin. Looking around I see the RK quick acceleration kit, and was wondering the difference between 1 down in the front to 1 up in the back.
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post #2 of 20 Old 04-11-2012, 4:31 AM
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Re: Changing sprocket size

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Originally Posted by Darkhell View Post
I have been riding my 01 929 with a 44 rear sprocket and stock front, but the back lost a tooth and others thin. Looking around I see the RK quick acceleration kit, and was wondering the difference between 1 down in the front to 1 up in the back.

Roughly three to one difference as the front sprocket is roughly one-third the size of the rear. One down on the front is fairly minor though and is usually just the starting point for most people as they often go up a couple on the rear as well.

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post #3 of 20 Old 04-11-2012, 9:21 AM
 
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Re: Changing sprocket size

I recomende -1 on front and +3 rear, chain size will be same with no problems.
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post #4 of 20 Old 04-11-2012, 12:19 PM
 
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Re: Changing sprocket size

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Originally Posted by maciejszumny View Post
I recomende -1 on front and +3 rear, chain size will be same with no problems.
how big is the difference with that setup?
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post #5 of 20 Old 04-11-2012, 4:29 PM
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Re: Changing sprocket size

I would go with just -1 on the front spocket, surely with more on the rear youll be in 6th in no time and will be expecting another gear.
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post #6 of 20 Old 04-12-2012, 1:03 AM
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Re: Changing sprocket size

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Originally Posted by hfb View Post
I would go with just -1 on the front spocket, surely with more on the rear youll be in 6th in no time and will be expecting another gear.

Perhaps you should try it first.
One off the front is _minor_ for gearing changes.

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post #7 of 20 Old 04-12-2012, 1:04 AM
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Re: Changing sprocket size

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Originally Posted by maciejszumny View Post
I recomende -1 on front and +3 rear, chain size will be same with no problems.
I'd be surprised if you can run the stock chain length with more than -1/+2 unless the chain is very worn.

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post #8 of 20 Old 04-12-2012, 1:07 AM
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Re: Changing sprocket size

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Originally Posted by noahb View Post
how big is the difference with that setup?

It's simple math.
42/16 is 2.625:1.
45/15 is 3.000:1.
Around 14% difference in engine speed at the same road speed.

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post #9 of 20 Old 04-12-2012, 1:09 AM Thread Starter
 
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Re: Changing sprocket size

How much does it take off the top end? My bike isn't stretched and with one up in back and a power commander the bike wants to pop the front up shifting to second and third.

I'm looking for a good balance for an all around riding experience, I love snappy acceleration, popping willies, and high speeds. So the 1 down in the front would be more mild then 1 up in the back?
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post #10 of 20 Old 04-12-2012, 1:14 AM
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Re: Changing sprocket size

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Originally Posted by Darkhell View Post
How much does it take off the top end? My bike isn't stretched and with one up in back and a power commander the bike wants to pop the front up shifting to second and third.

I'm looking for a good balance for an all around riding experience, I love snappy acceleration, popping willies, and high speeds. So the 1 down in the front would be more mild then 1 up in the back?

You can lower the gearing to around 15/45 before you lose any top end speed.
I wouldn't be concerned about the top speed as that gets boring real quick.
No, +1 on the rear is more mild than -1 on the front.

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post #11 of 20 Old 04-12-2012, 3:15 AM
 
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Re: Changing sprocket size

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Originally Posted by bladeracer View Post
I'd be surprised if you can run the stock chain length with more than -1/+2 unless the chain is very worn.
I have brand new chain did vx50 108 links.
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post #12 of 20 Old 04-12-2012, 3:17 AM
 
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Re: Changing sprocket size

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Originally Posted by noahb View Post
how big is the difference with that setup?

1st- power wheelie
2nd- power wheelie
3rd- clutch wheelie

Top speed enough, but is more manual in the city,
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post #13 of 20 Old 04-12-2012, 3:18 AM
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Re: Changing sprocket size

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Originally Posted by maciejszumny View Post
I have brand new chain did vx50 108 links.


On a 929?

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post #14 of 20 Old 04-12-2012, 3:21 AM
 
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Re: Changing sprocket size

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Originally Posted by bladeracer View Post
On a 929?

Sorry 900 sc28
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post #15 of 20 Old 04-12-2012, 5:23 AM Thread Starter
 
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Re: Changing sprocket size

Is there a percent that the speed is off after you change the sprocket size? I seemed like the one in the back made mine read about 10 MPH faster then I was going.
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