Jetting?300ex With Big Gun Slip

[300excrazy98]

i just bought a big gun race slip on, i cant really go when im at the WOT position, it is kinda restricting there, i think i need to re jet it, what jets do you think i should try? its perfect when im idleing and its perfect up until little bit for than half throttle

Edit: I live in Nj and i run a K&N filter

[300excrazy98]

anybody? nobody has any suggestions where to start?

[hardkoratvmxr]

125 i run the same thing but a hmf slip on with airbox lid on and i have a 125 in summer and 128 in winter start there