When I bought my bike a month ago the guy gave me a 48 tooth sprocket that he had never had on the bike so he couldn't tell me what the result was. Anyone out there
have and experience with a 48 tooth? Someone told me this is kinda like change the rearend in my mustang, is that true?

 

your stock is a 46 tooth going up to a 48 will increase your acceleration but nock some mph off your top end

 

oic, so it is like rearend gear.....if i went up 2 in the rear would I need to get a longer chain? The chain I currently have is fairly new.

 

no you dont need a new chain. You can use the stock one. If you want you can drop a tooth off the front sprocket and add 2 on the rear and still be able to use the stock chain size.

I currently have that setup on my bike and you will be doing 2nd and 3rd gear wheelies easily. If you dont like the wheelies. Try lowering it an inch and it will make it a little harder to come up but you will still have that insane acceleration from your sprockets.

 

Thanks, was hoping i could stick with stock chain. If i go up 2 in the rear will it power wheelie or just clutch up easier?

 

Ok, just learned that stock f4i rear is 45 so I'll be going up 3 in the rear... should I change the front also or is it ok to just change the rear. Everywhere i read about sprockets they are changing both but I only have the rear. So should I invest in the front also? I don't want to many rpms, just want the front to come up a little easier. Power wheelie would be
cool but I'll settle for an easier clutch up.

 

Whenever you replace one of the drivetrain components, i.e. chain, countershaft sprocket, rear wheel sprocket - you should replace all of them together. These components break in together and replacing one without replacing the rest will lead to premature failure of the other components. You can buy a whole kit (2 sprockets and a high quality chain) for about 165. As far as the gearing goes, if you increase the rear sprocket you will need more chain length. If you decrease the front sprocket you'll need less. Both of these changes make for faster acceleration and lower top speed. So, it all depends on how you ride and what your intention for the bike is. If you're mainly into road riding, you're best off not changing the gearing too dramatically. If you're a total stunter, you'll probably want to put a garbage can lid on your rear wheel to make circles easier. Personally, I'm a mix of the two. I ride with one down in front and 2 up in the rear. This makes wheelies easier to pull up in 1st and 2nd on horsepower and clutch ups are mildly easier too.

 

Here you can experiment with your gearing and chain length: http://www.xs4all.nl/~ator0437/gc/

Regards, Jean