Tweaking my Vitacci XMT 250

[Davey_the_Great]

Thoroughly enjoying my first bike (Vitacci XMT 250) and like any red blooded American male always intrigued by improving the performance and power.
The bike has a 165FMM 223cc motor with 6 speed transmission and EFI.
I am toying with the concepts of front sprocket upgrade and cat delete.
The back sprocket says 520-38 so I presume it's a 520 chain on a 38 tooth sprocket?
The front sprocket has 13 teeth.
I've read where the Venom Z250 (same engine) has a 17-tooth sprocket with a top speed 80-85 Mph.
Does anyone have definitive experience with doing these kind of tweaks on similar street bike and what substantive benefits derived?

[Mannyteja]

Hey did you ever mod your XMT just picked one up and its nearly impossible to find any info on what mods can be done to it.

[ProDigit]

17/38t is pretty much the ideal gearing for top speed on these 250cc bikes.

[Mannyteja]

Originally Posted by ProDigit

17/38t is pretty much the ideal gearing for top speed on these 250cc bikes.

Thanks for the quick response i went to a shop that told me if i wanted more top end speed to go 35-36 on the rear .