jetting for a blaster

[HKIC]

i have a blaster and i got some new parts and need to rejet. i currently have the stock jetting (idk if the previous owner re jetted it) i have a LRD exhaust, K&N filter, and the lid will be off the airbox and thats it. and my elevation is 115 ft above sea level. i need to know what the main jet should be, and ive never jetted before so I came to you guys (and girls) any help would be appreciated

-thanks

[jlsparky7]

260-300

[mpbanshee]

Start with a 300, and come down till it doesent stumble when wide open in 6th.

[HKIC]

thanks guys