GSX-S Chain and Sprockets
GSX-S Chain and Sprockets, Changing the GSXS gearing is one of the cheapest ways to change the performance of your bike from a more relaxed cruiser to a frenetic, wheelie mad stunt bike.
The standard GSXS Gearing is 17 front, 44 rear for the GSX-S1000 and 17/43 for the GSX-S750.
I changed mine to -1/+4(front sprocket 1 smaller and rear 4 larger), 16/48 It makes it much quicker off the line and far more responsive, I use a 200/55 rear tyre which makes my GSXS gearing equivalent to -1/+2 with original tyre, this makes the GSXS gearing about 15% lower than stock, boosting acceleration and because I raised the rev limit with a Woolich reflash I didn’t lose any GSX-S1000f top speed.
With the stock sprockets (17/44) the front sprocket rotates 2.59 times for every rotation of the wheel, with (16/48) its exactly 3 rotations for every rotation of the back wheel
The GSX-S1000f top speed with these mods (-1/+4, 200/55 tyre and 13,100 rpm) is about 272kmh (Mine showed 285kmh on the speedometer)
As can be seen in the table below the GSX-S750 has a much wider ratio gearbox – I wish i could put a 750 gearbox in my GSX-S1000
|Final gear Ratio||1.553||1.857|
|Gears||Ratio||Diff.||Total Ratio||Gears||Ratio||Diff.||Total Ratio|
|Rear wheel sprocket||44||43|
As standard the GSX-S1000 has a 525 chain, I changed mine to a 520, lighter but hi-spec and stronger so less reciprocating mass, with lighter sprockets too, Afam GSX-S Chain and Sprockets
I use an Afam AFAM 520XHR2-G chain, this hyper reinforced gold color Xs-ring chain with a very high tensile strength and fatigue resistance. The customized shape of the Xs-rings keeps the grease longer inside the chain making it the ideal chain for an heavy touring motorcycle.
I have a 48 tooth rear AFAM Racing Aluminum Sprockets these have harder surface obtained by hard anodizing. Most of these sprockets exist in the original pitch, but also in a conversion model for a narrower chain. These AFAM sprockets have custom tolerances for race use and a weight-saving design to ensure the most efficient transmission.
And a 16 tooth front AFAM Racing sprocket, computer designed. Light built but still providing sufficient safety. They are especially designed to save weight in racing applications, usually to fit a smaller and thus lighter chain. In this case they are aligned towards the engine.
I also use Lightech Chain adjusters
Useful links for GSX-S Chain and Sprockets – Cheek speeds, RPM, chain length etc – Gearing Commander