Upgrade For 02 CBR F4i
 

I've had my CBR 02 F4i for a few months bought it with 35kmiles on it & currently have 39k on it and want help putting in new parts into the transmission and engine...what are a few upgrades I can put into? Durable parts, parts for more speed (top out at 171) and what engine mods can I do? Not interested in buying a new bike nor taking it to a track just need suggestions on engine & trans mods/upgrades

You can add a full exhaust and PC ($$)
You can bore it out ($$)
you can add a turbo ($$)
you can add nitrous ($$)

but in order to get a higher top speed with any of those mods, you will have to change your sprockets to have slower acceleration (Higher teeth in front and/or lower in the rear) which in turn will let you reach higher speeds

What can I do to keep the acceleration? Don't think I want to add nitro or turbo but boring out the adding the full exhaust I will do! Are the $$ meaning its going to cost a pretty penny?

It will cost you some coin.

But adding enough power will help overcome the changing of the sprockets and assist in masking/getting rid of the acceleration issue.

Closing this thread as the question is being asked and answered here: https://cbrforum.com/forum/f4i-main-...grades-144256/