Author Topic: Sprocket, chain, and gear ratios.  (Read 5640 times)

Offline ragecage23

  • Trade Count: (+1)
  • AMA Superbike Racer
  • ****
  • Posts: 708
  • Karma: +0/-0
Sprocket, chain, and gear ratios.
« on: September 01, 2010, 04:25:55 AM »
I've been thinking of getting a 45 tooth rear sprocket. Now I'm pretty sure that I need a bigger chain, but what about the gear ratios? Do I need to change those? Or will they change by themselves?
Previous bikes: 2002 Ninja 250R
                       2009 Suzuki GS500F (rest in peace)
Current bike: 2007 Kawasaki ZX-10R

Offline Paulcet

  • Trade Count: (+2)
  • MotoGP Racer
  • ******
  • Posts: 2502
  • Karma: +5/-0
  • Apparently, I'm invisible
Re: Sprocket, chain, and gear ratios.
« Reply #1 on: September 01, 2010, 04:31:05 AM »
Yes, longer chain. No, don't mess with the gears.

'97 GS500E Custom by dgyver: GSXR rear shock | SV gauges | Yoshi exh. | K & N Lunchbox | Kat forks | Custom rearsets | And More!

Offline ragecage23

  • Trade Count: (+1)
  • AMA Superbike Racer
  • ****
  • Posts: 708
  • Karma: +0/-0
Re: Sprocket, chain, and gear ratios.
« Reply #2 on: September 01, 2010, 05:06:02 AM »
Now, front sprockets are cheaper, and if I went with a smaller front sprocket instead: 1) would wheelies still be able to be done like they would with a bigger rear sprocket (go ahead and call me an idiot) and 2) would I have to get a smaller chain?
« Last Edit: September 01, 2010, 05:20:18 AM by ragecage23 »
Previous bikes: 2002 Ninja 250R
                       2009 Suzuki GS500F (rest in peace)
Current bike: 2007 Kawasaki ZX-10R

Offline Big Rich

  • Trade Count: (+8)
  • Motorcycle God!
  • ******
  • Posts: 3748
  • Karma: +52/-0
Re: Sprocket, chain, and gear ratios.
« Reply #3 on: September 01, 2010, 07:29:08 AM »
Technically, you should replace the entire set as one (chain & both sprockets) so they wear together.

Generally, smaller front sprockets arent recommended because it makes the chain work harder to go around the smaller diameter. And on some bikes it will move the chain too close to the swingarm (think "chainsaw"). If you see only going a couple teeth either way, that's how many more or fewer links you will need. It is easier to just order a longer chain and cut off what isnt needed.

And to figure the gear ratio from a sprocket change, take the number of teeth in the rear divided by the number of teeth in the front. I read before that a 10% difference ratio from stock is acceptable..... but I've gone way over that with no consequences. My $.02
83 GR650 (riding / rolling project)

It's opener there in the wide open air...

Offline ragecage23

  • Trade Count: (+1)
  • AMA Superbike Racer
  • ****
  • Posts: 708
  • Karma: +0/-0
Re: Sprocket, chain, and gear ratios.
« Reply #4 on: September 01, 2010, 07:57:34 AM »
My next question would be are rear sprockets difficult to install? 1-10, 10 being the most difficult.
Previous bikes: 2002 Ninja 250R
                       2009 Suzuki GS500F (rest in peace)
Current bike: 2007 Kawasaki ZX-10R

Offline sledge

  • Trade Count: (+2)
  • Motorcycle God!
  • ******
  • Posts: 4278
  • Karma: +44/-0
  • He's Mr Brightside
Re: Sprocket, chain, and gear ratios.
« Reply #5 on: September 01, 2010, 09:46:42 AM »
but what about the gear ratios? Do I need to change those?

I dont think you can buy new gear ratios as spares anymore but it might be worth a call to your local dealer to see what they can offer  :thumb:

Offline gsJack

  • Global Moderator
  • Trade Count: (+1)
  • Motorcycle God!
  • *****
  • Posts: 4487
  • Karma: +47/-0
407,400 miles in 30 years for 13,580 miles/year average.  Started riding 7/21/84 and hung up helmet 8/31/14.

Offline ragecage23

  • Trade Count: (+1)
  • AMA Superbike Racer
  • ****
  • Posts: 708
  • Karma: +0/-0
Re: Sprocket, chain, and gear ratios.
« Reply #7 on: September 01, 2010, 02:51:44 PM »
What are chain pitch and center distance?
Previous bikes: 2002 Ninja 250R
                       2009 Suzuki GS500F (rest in peace)
Current bike: 2007 Kawasaki ZX-10R

Offline ragecage23

  • Trade Count: (+1)
  • AMA Superbike Racer
  • ****
  • Posts: 708
  • Karma: +0/-0
Re: Sprocket, chain, and gear ratios.
« Reply #8 on: September 04, 2010, 08:51:13 PM »
bump
Previous bikes: 2002 Ninja 250R
                       2009 Suzuki GS500F (rest in peace)
Current bike: 2007 Kawasaki ZX-10R

Offline mister

  • Don't call me mister, I work for a living
  • Trade Count: (0)
  • Motorcycle God!
  • ******
  • Posts: 6370
  • Karma: +1004/-0
  • There is Always a way
Re: Sprocket, chain, and gear ratios.
« Reply #9 on: September 04, 2010, 09:33:48 PM »
What are chain pitch and center distance?

Chain pitch is the distance between any three consective rivets divided by two. Gives...


Center Distance is the distance between the sprocket shafts. That is, the center of the sprockets.

Michael
« Last Edit: September 04, 2010, 09:50:14 PM by mister »
GS Picture Game - Lists of Completed Challenges & Current Challenge http://tinyurl.com/GS500PictureGame and http://tinyurl.com/GS500PictureGameList2

GS500 Round Aust Relay http://tinyurl.com/GS500RoundAustRelay

Offline average

  • Trade Count: (+4)
  • World Superbike Racer
  • *****
  • Posts: 1867
  • Karma: +1/-0
Re: Sprocket, chain, and gear ratios.
« Reply #10 on: September 05, 2010, 05:39:04 AM »
So what was figured to be the best setup; pep when you need while given optimal gas mileage?
R.I.P
Rich(Phadreus)
90 gs5 04 Fairings(that's right)
LP flushmounts up front  shortened turn signals
Kanatuna rear wheel swap
Kat FE

Offline marc

  • Trade Count: (0)
  • Formula Extreme Racer
  • ***
  • Posts: 189
  • Karma: +0/-0
Re: Sprocket, chain, and gear ratios.
« Reply #11 on: September 07, 2010, 11:32:17 AM »
You can get non-original sized gears at:

http://www.sprocketspecialists.com/

Offline burning1

  • Trade Count: (+4)
  • MotoGP Racer
  • ******
  • Posts: 2041
  • Karma: +23/-0
  • AFM #857
Re: Sprocket, chain, and gear ratios.
« Reply #12 on: September 07, 2010, 06:42:44 PM »
Rule of thumb with chains:

Removing 1 tooth from the front sprocket is the same as adding 3 teeth to the rear sprocket.
Removing 1 tooth from the front sprocket is almost always safe. Removing 2 is sometimes safe.
You can usually add or subtract 3 teeth in total from the sprockets, without buying a new chain.

The teeth are additive. E.g. Removing one tooth from the front and adding three teeth to the rear only counts as a 2 tooth difference, as far as chain length is concerned.

Also... The stock bike will wheelie. You just have to do it right. :)

Offline ragecage23

  • Trade Count: (+1)
  • AMA Superbike Racer
  • ****
  • Posts: 708
  • Karma: +0/-0
Re: Sprocket, chain, and gear ratios.
« Reply #13 on: September 07, 2010, 07:32:44 PM »
Oh yeah, I've gotten the stock bike to wheelie, I'm just trying to make it easier, thanks for all the help. I'm very new to working on bikes.
Previous bikes: 2002 Ninja 250R
                       2009 Suzuki GS500F (rest in peace)
Current bike: 2007 Kawasaki ZX-10R

Offline jfman

  • Trade Count: (0)
  • Local Club Racer
  • *
  • Posts: 28
  • Karma: +0/-0
Re: Sprocket, chain, and gear ratios.
« Reply #14 on: February 24, 2013, 03:48:41 AM »
whats the stock tooth count on the gs500 ?

Offline adidasguy

  • Playing with kittens in Heaven now...
  • Trade Count: (+117)
  • Motorcycle God!
  • ******
  • Posts: 10934
  • Karma: +519/-0
  • Grumpy Cat for President!
    • Pix of my bikes
Re: Sprocket, chain, and gear ratios.
« Reply #15 on: February 24, 2013, 04:44:18 AM »
16 / 39 is stock
chain is a 520 size 110 links
« Last Edit: February 24, 2013, 04:44:52 AM by adidasguy »

Offline Mxrider787

  • Trade Count: (0)
  • Local Club Racer
  • *
  • Posts: 4
  • Karma: +0/-0
2007 gs500f sprocket combination help
« Reply #16 on: May 14, 2019, 11:57:55 PM »
I want to gain a lot more torque. Thinking about using a 15T front with a 46T rear sprocket.  Does this seem to aggressive, my last bike was a 97 bandit 600 that I stunted (put smallest front/biggest rear sprockets I could get) just not sure on the tooth count for front/rear.  I donít plan on stunting my 07 gs500f just want to be able to get up to 90mph quick as possible.

Offline Meukowi

  • Trade Count: (0)
  • AMA Supersport Racer
  • **
  • Posts: 79
  • Karma: +0/-0
Re: Sprocket, chain, and gear ratios.
« Reply #17 on: May 15, 2019, 07:11:32 AM »
i went to 16/46 with 114chain and its at the edge to be too low gear ratio, gears 2 and 4 feels useless, but it acclerates pretty good. faster than 600bandit with stock gears

Offline Bluesmudge

  • Trade Count: (+4)
  • World Superbike Racer
  • *****
  • Posts: 1931
  • Karma: +32/-0
Re: Sprocket, chain, and gear ratios.
« Reply #18 on: May 15, 2019, 03:49:32 PM »
Remember that sprockets only change what you can do in 1st and 6th gear. They dont change the torque of the engine. Suzuki got the ideal sprockets figured out when they designed the bike. Only change them if you specifically want faster take offs in 1st or a different rpm at a given speed in 6th gear.

Offline Mxrider787

  • Trade Count: (0)
  • Local Club Racer
  • *
  • Posts: 4
  • Karma: +0/-0
Re: Sprocket, chain, and gear ratios.
« Reply #19 on: May 17, 2019, 06:14:06 AM »
Iím sorry but that makes no sense about only affecting 1st and 6th? My 97 bandit had major acceleration gains in every gear and all speeds. I lost 15mph top speed at redline and 1st gear was very short.