How hard is it to gear a bike?

G

godsd3vil

Well-known member
Id like to gear my bike and do not know how to do it.
If there is anyone in the york uni area that would like to help me work on it, would be great as id love to do the work on my bike myself and learn. I dont want to end up opening it up and cant put it back. If anyone is willing pm me.. otherwise my last resort is rosey toes.
Thanks

P.s What is the best ratio ?
 
What bike???
If you bike is shaft or belt driven, you can't change the gearing.

Best ratio for what?
Why do you want to change your gearing? (more acceleration, better fuel economy, more top speed, lower highway RPM, etc..)
 
Although not 100% accurate to real life scenarios, this tool can be a great help to get you in the ballpark of what you're looking for.

http://www.gearingcommander.com/
 
godsd3vil said:
Bike is a 03 r6.
Best ratio for more acceleration.
Thanks
Click to expand...

Define "best", and define how much compromise you can live with in cruising RPM.

If you are installing a new chain anyways, keep the number of teeth on the front sprocket the same as stock and do all the ratio-changing with the rear sprocket and install a longer chain (cut it to the correct length at assembly). It puts less stress on the chain and the chain is less likely to rub on the plastic guides on the swingarm. But you need a new chain.

Otherwise, most people just put a tooth smaller front sprocket.
 
Franko! said:
What bike???
If you bike is shaft or belt driven, you can't change the gearing.
Click to expand...

I could have sworn I installed an overdrive pulley on my belt drive bike.. oh wait.. I did.
They also have kits for shaft drives, but they are uber expensive.
 
new chain... new sprocket.. (i think) ... I want as much acceleration as possible keeping the topend speed a little over 200.. I dont know much about gearing so any advice is helpful...
 
general rule is for every one tooth smaller in the front, it equates to 3 teeth bigger in the back. Common gear ratio is -1 front and +2 back which gives u an ovareall change of 5 teeth.

Obviously this 5 teetc change makes bigger/smaller difference on different bikes, depending on what your ratio was to start off with.

I just re-geared my bike today. took about 30 min and to be honest, the hardest part was putting the rear wheel back on....i HATE the way suzuki have the rear caliper bracket setup on the gsxr's....HATE IT! The VTR i popped the rear wheels on and off in seconds...
 
godsd3vil said:
new chain... new sprocket.. (i think) ... I want as much acceleration as possible keeping the topend speed a little over 200.. I dont know much about gearing so any advice is helpful...
Click to expand...

new chain, new stock size front sprocket, new 56 thooth rear sprocket.

top speed will be right around 200.
 
caboose483 said:
new chain, new stock size front sprocket, new 56 thooth rear sprocket.

top speed will be right around 200.
Click to expand...

And it'll wheelie on the htrottle in 5th,LOL

j/k
 
Yes, huge changes in drive ratio will make the bike a wheelie monster. If that's what you want (stunters) that's great, but for road use, all that's going to do is get you in trouble. If you want the bike to launch for the horizon, there are other things that can be done to either lengthen the wheelbase or lower the center of gravity or both, but there will be compromises in handling. How much of a compromise, depends on how well you pay attention to the geometry (rake, trail, swingarm pivot height, etc).
 
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