where (online) is a good place to look for sprockets (aftermarket)?

soon my gs will no longer need to make freeway trips, so i can drastically shorten the gearing without being terribly inconvenienced.

any reccomendation on how short to go? how much it too much?

thanks for opinions and suggestions,

http://www.sprocketspecialists.com/

they make rear sprockets as big as 74 tooth? damn. that i think would fall on the side of too much.

I bought my 17-Tooth front sprocket at BikeBandit. They offer several flavours, but I bought an AFAM.

stunters use them

hmmm... trying to find out how much impact on mph at a given rpm a change of teeth makes.

simple math, man...don't try and make it hard:

Say your speedo is 100% accurate with a 15/40 setup.

but you want a little more zip?  Try a 15/42 setup.

40/42 = .95%

Now, when you're speedo says you're moving 70mph, you'll actually only be goign 95% of that.

70 X .95 = 66.6mph

Mackenzie71

You are partially right.

His speedo won't be affected only his rpms. So when he used to go 70mph at say 6000 rpm it will be 5% more. The speedo reading is from the front wheel.


Even if you go to a 15 tooth with the stock gearing rear sprocket 39 you only go about 250 rpms more, which is good anyways as the gs can't redline in 6th anyways.

Hope that helps

Quote from: bulletproofcycleMackenzie71

You are partially right.

His speedo won't be affected only his rpms. So when he used to go 70mph at say 6000 rpm it will be 5% more. The speedo reading is from the front wheel.


Even if you go to a 15 tooth with the stock gearing rear sprocket 39 you only go about 250 rpms more, which is good anyways as the gs can't redline in 6th anyways.

Hope that helps

yeah completely disregard what I just said...I'm very sorry about that.  I've been dealing with my TL1000S for so long that I don't typically stop to think that not every bike gets it's speedo reading from the transmission.

i had some spare time today and was trying to figure it out kinda accurately.

39/16= 2.4375
42/15= 2.8

2.4375/2.8= .87
100-87= 13

if i'm thinking right a change from stock to 42 rear and 15 front would make my bike have a speed 13% slower in any gear at a given rpm.

math/ thinking guru's am i right?

no speed stays the same...your speedo reads off the front wheel.

Quote from: makenzie71no speed stays the same...your speedo reads off the front wheel.

He's not talking about the speedo reading - he means the speed at a given RPM - or the RPM at a given speed, same diff.

i know my speedometer reads off the front wheel, but if i put the engine at 5000 rpm in 6th i will be going X mph with stock gearing.

with the changes i would be going 13% slower in sixth at 5000rpm

yeah...that's should be correct, if you did the same thing I showed you but using RPM instead of mph.

~just double checked it, 13% is correct.

http://evilpumpkinracing.com/eprlinks.htm has a gearing calculation chart. That is the one I use.

That's a good tool...

OK, now that the useful information has been posted, every time I saw this subject line, I thought...

Quote from: RoadstergalThat's a good tool...

OK, now that the useful information has been posted, every time I saw this subject line, I thought...

I'm not sure who that is, but mr. spacely keeps coming to my mind...

Quote from: RoadstergalOK, now that the useful information has been posted, every time I saw this subject line, I thought...

Would you like to touch my monkey?

Dieter and the Sprockets from SNL.

Quote from: RoadstergalThat's a good tool...

but of course