scared me for a second there, I was like I know mine only has one right now
if the stock cable doesn't work they sell a universal cable specific to that tube that they say works with all carbs within the 30-38mm range, and I believe the B4 has a 33mm carb if the page I looked at was correct... i'm just wondering if any potential issues jump out at anyone, the throttle and CBR switch are together only like $30 so figure I might give it a shot