I've had my 1975 xs650 for a week now. This is my first motorcycle and I am still getting used to releasing the clutch. I took the pipe ends off and a buddy of mine jetted the carbs to a bigger size. Now when I try to slowly release the clutch it spitter spatters and bogs a bit then takes off. It seems that when I let the clutch out there's no point that it slowly engages allowing me to walk forward with the bike. It's very jerky when it does engage even if I am fluent and even with my gas and clutch. Anyone know what I'm doing wrong?