Route your clutch cable like depicted in the manual. The springs are not that strong and you shouldn't need a gorilla grip to pull the clutch.
Your description shows that your clutch might not fully disengage. It's not the oposite of clutch slippage but seems to be a different problem.
The 550's clutch has three levers: The hand control, the outer lever on the clutch cover and an internal one.
First, put a lot of slack into the cable by screwing in the adjustment screws at the handle bar and the lower end of the cable.
Next, feel if the lever on the clutch cover has some free play. If not, this might be your problem.
Anyway, use the screw on the lower part of the clutch cover (lock nut!) to adjust this 'outer' lever, so that the dot mark on it aligns with the corresponding mark on the clutch cover. (see pic)
Then back out the adjustment screw at the handle bar about half of its length and use the adjustment screw at the other end of the cable to remove all of the slack and tighten its lock nut. Now again use the adjuster at the handle bar to adjust the hand control lever until it has about 1/2" to 3/4" of free play at its tip. Without this free play, you'll experience the "left needle, right needle" game
That should do the trick. If you can't align the marks on the clutch cover, your clutch might be worn beyond service limit.
Please excuse my poor English skills, but i hope that my description is a little bit more comprehensive than the workshop manual
Cheers
Carsten