My stock gearing is 15/43 I want to put 14/45 How much top end speed will I lose and how much easier will it stand up? Im sure someone else on here has the same ratio

 

I cannot answer that question but I've read that our beloved bikes, without modifications, will not get enough oil if you stand them up for more than a few seconds. Don't know what you've got planned for it or if this fact is even true, but it could be worth looking up.

 

Go to the Gearing Commander website, load your bike's data from the drop-down menu and experiment with different ratios to see how they affect speed and rpm.