brute force jetting

I have a 2008 BF 650i, chipped, snorkels, hmf pipe, k&n air filter, clutch kit. It has a hard time starting when it's cold and farts through the carbs at idle and when riding. If it's idling.. its fart through the carb and kill the engine. I looked at the needles and they're shimmed at the 4th...

2006 Brute Force 750i Just bought a Brute and it seems like the guy I bought it from has jetted it wrong. The bike starts and idles fine but when I ride between 0-15mph it backfires rarely but when I begin to exceed 15mph it sputters terrible and wont climb much over 25mph. When I removed the...