Understanding Sprockets? - TwoWheelForum: Motorcycle and Sportbike forums
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post #1 of 21 (permalink) Old 04-14-2007, 05:14 PM Thread Starter
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Understanding Sprockets?

Guyz i would appreciate if someone can explain to me the sprocket changes ie if i go -1 front and +2 in the rear what do i get?

Why do most sites for say the busa say go +1 in the front and not -1?
I know the bigger you go in the rear the higher rpms you will get thus giving you a shorter distance,etc but whats with the front sprocket? what does it have to do with it?
Your input would be appreciated
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post #2 of 21 (permalink) Old 04-14-2007, 05:22 PM
 
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Guyz i would appreciate if someone can explain to me the sprocket changes ie if i go -1 front and +2 in the rear what do i get?

Why do most sites for say the busa say go +1 in the front and not -1?
I know the bigger you go in the rear the higher rpms you will get thus giving you a shorter distance,etc but whats with the front sprocket? what does it have to do with it?
Your input would be appreciated
I've got a set of -1f and +2r sitting here ready to be installed... this will increase my acceleration... but decrese my top speed


-1 in front is like going +3 in the rear... so for my -1f and +2r it's the same as +5 in the rear... but I can use a shorter chain by reducing the front.

if they're telling you to go +1 ( like going -3r) in the front it's gonna reduce your acceleration but increase your top speed.

either way you'll need a spedo healer to correct your speedometer to match your adjustments.

so you've got a decision... do you wanna go quicker or faster?

personally... I'd look at it this way... how often do you hit the 180top speed? I'd rather get there quicker...

just remember that if you go for quicker... like I am... the front is gonna be light...
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post #3 of 21 (permalink) Old 04-14-2007, 05:46 PM Thread Starter
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Quote:
Originally Posted by ebbs15 View Post
I've got a set of -1f and +2r sitting here ready to be installed... this will increase my acceleration... but decrese my top speed


-1 in front is like going +3 in the rear... so for my -1f and +2r it's the same as +5 in the rear... but I can use a shorter chain by reducing the front.

if they're telling you to go +1 ( like going -3r) in the front it's gonna reduce your acceleration but increase your top speed.

either way you'll need a spedo healer to correct your speedometer to match your adjustments.

so you've got a decision... do you wanna go quicker or faster?

personally... I'd look at it this way... how often do you hit the 180top speed? I'd rather get there quicker...

just remember that if you go for quicker... like I am... the front is gonna be light...
What bike do you have?
I need it for a friend's GSXR750 -K6
And a K6 Busa
Thanks for the info
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post #4 of 21 (permalink) Old 04-14-2007, 06:54 PM
 
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What bike do you have?
I need it for a friend's GSXR750 -K6
And a K6 Busa
Thanks for the info
I have a 05 Kawasaki ZZr600... the pics in my sig

yeah I think if you went -1f +2R on the 750 that bitch is gonna wanna stand on end!

the busa is a little heavier but I think it'll come up pretty quick too. (but I don't know much about the 750's or busa's...)


what are you looking for though... top end or acceleration?
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post #5 of 21 (permalink) Old 04-15-2007, 10:00 AM
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The -1f +2R is the most common.

The busa top speed guys are doing the +1F to get that top end. All the guys that want to do the 220 mph on the GPS. They usually make up for the gearing with turbo and NOS.

But either way it is like changing the gearing in your car. The -1F or +2R...Its like swapping out your 3.73 rear end for a 4.10 and just the opposite for the opposite bike gearing. Dependant on what you want.




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post #6 of 21 (permalink) Old 04-15-2007, 10:16 AM
 
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Here's an easy way to remember which way you are going:

Use the formula rear teeth / front teeth. The higher this number is, the quicker your accleration, and vice versa. You can see from this formula why decreasing teeth in the front and increasing in the rear both work towards increasing your acceleration.

I'm always weary of going smaller on the front, due to increased chain wear from the smaller sprocket radius. 1t probably isn't going to hurt anything, but I would personally increase the rear and leave the front alone.

Good luck!
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post #7 of 21 (permalink) Old 04-15-2007, 11:20 AM
 
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quick question, I'm going two up in the rear, do i need a speedo healer or will i be ok?
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post #8 of 21 (permalink) Old 04-15-2007, 11:35 AM
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You'll be fine but your speedo will be that much more off.

Your speedo from the factory is off.


Get a speedo healer. They are cheap and they will keep un-used miles off your bike too!




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post #9 of 21 (permalink) Old 04-15-2007, 12:16 PM
 
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You'll be fine but your speedo will be that much more off.

Your speedo from the factory is off.


Get a speedo healer. They are cheap and they will keep un-used miles off your bike too!
I thought it was off, but i wasnt sure. Where can I get one?
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post #10 of 21 (permalink) Old 04-15-2007, 03:26 PM
 
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I thought it was off, but i wasnt sure. Where can I get one?
I got mine from Kneedraggers.com


HERE


be aware that one is for my bike... not sure what the change is but it does specify Kawasaki
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post #11 of 21 (permalink) Old 04-16-2007, 07:05 AM
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The only part that changes from bike to bike is the harness.

I don't have my links here at work... but there are alot of places to get them...

Do a search here... I know I have a thread on here somewhere when I put one on my 9R




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post #12 of 21 (permalink) Old 04-25-2007, 08:12 PM
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sorry to bring this back from the dead. but how would i go about changing the speedo on a carbed bike? cuz i found a site that sells the change in sprocket size and im thinkin of going with a 43 in the back stock is like 38 and front is like 15. well thats my theory seeing as how thats what the site says. does the clymers manual tell what your stock specifications are? or would i need say a service manual for that. well thanks for the info.
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post #13 of 21 (permalink) Old 04-25-2007, 08:28 PM
 
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sorry to bring this back from the dead. but how would i go about changing the speedo on a carbed bike? cuz i found a site that sells the change in sprocket size and im thinkin of going with a 43 in the back stock is like 38 and front is like 15. well thats my theory seeing as how thats what the site says. does the clymers manual tell what your stock specifications are? or would i need say a service manual for that. well thanks for the info.
what bike do you have? you might still be able to use the Spedo Healer...

I have a carbed bike... 05 ZZr600 and I've got the spedo healer... though it's still not in yet
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post #14 of 21 (permalink) Old 04-25-2007, 10:33 PM
 
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Hey if ya'll lookin for a speedohealer I just ordered mine for 96 bucks shipped from solomotoparts.com. they run for like 95 on there and if you put in the discount code "gotitfromsolo" when you're checking out, it will take 10 bucks off. but its only good till the 30th of April. Oh and its only good for purchases of $75 or more. just thought I'd let you guys know.
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post #15 of 21 (permalink) Old 04-25-2007, 10:35 PM
 
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Originally Posted by DubLDN2O View Post
sorry to bring this back from the dead. but how would i go about changing the speedo on a carbed bike? cuz i found a site that sells the change in sprocket size and im thinkin of going with a 43 in the back stock is like 38 and front is like 15. well thats my theory seeing as how thats what the site says. does the clymers manual tell what your stock specifications are? or would i need say a service manual for that. well thanks for the info.
Make and model? Some bike run the speedo off the front wheel.



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post #16 of 21 (permalink) Old 04-25-2007, 10:42 PM
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mines a frikin dinosaur compared to all these new bikes. its a 79 honda cb750 i found a place online that still makes sprockets and i believe from the looks of everything that i could just swap from the F series to the K series although im not sure if i did that if i would need to run a front and rear seeing as how they use a different chain size and length or what not. im pretty new to bikes but i always like getting ideas cranking in my head. im absolutely in love with adrenaline so i think switching to bikes is my next step in that upbringing.
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post #17 of 21 (permalink) Old 04-25-2007, 11:29 PM
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Well that old... its probably ran off the front wheel. Do you have a cable coming from the front hub? Not including the brake line...

And it has nothing to do with carbed bikes... it has to do with eletronic speedo's. And that has nothing to do with whether or not its a analog or digital speedo.




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post #18 of 21 (permalink) Old 04-26-2007, 05:46 AM
 
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speedometers are usually driven by either the front wheel, or the front sprocket. I think if yours is driven by the front wheel, you wouldnt need to adjust anything because there has been no change other than gearing. if it were sprocket driven, you'd have to change it because the sprocket is spinning faster than before, throwing your speed off.
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post #19 of 21 (permalink) Old 04-26-2007, 08:25 AM
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Yeppers!




-Chris
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post #20 of 21 (permalink) Old 04-26-2007, 10:31 AM
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well im not sure off hand. ive only seen it in pictures but not too well defined pictures. so if i see more than one line coming down the side of my forks then i have the speedo running off the wheel correct? now if it is ran off the front sprocket how would i go about recalibrating it?
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