when i bought my bike it had already had the rear sproket changed. It is three teeth bigger and 1 down in the front(i think i might be wrong on the the front). i def realized that the speedo was wrong but is there any way to fix that so the mileage on my bike doesnt rack up faster.

 

The only way is either change the sprokets to stock (16/43), or a speedo healer
http://www.calsportbike.com/cgi-bin/...x.cgi?pid=1988

Search around for better pricing, that was the first one to come up through google

 

Speedo healer works very well.I believe they go for around $100.00 or $200.00 for stock gearing and chain.

 

so even if u only go up a couple teeth on the rear, it still throws off the speedo, and the odo???

 

Yes it does.

 

Stock speedos and gearing is grossly inaccurate at high speeds. Let alone changing anything.