Motorcycle Repair: Honda carbs, throttle wheel, oil consumption

Question
I have a couple of questions about a '74 CB-360E that I recently purchased. First, it has an electronic ign on it.  The Clymers book makes mention of electronic ign but doesn't mention the timing of it, if there is any adjustment.  
Second, the MC idles at around 2000 rpm.  The idle adj (knurled knob) on left carb will increase rpm but will not lower it.  The exhaust presssure on the left cyl is weaker than the right.  This leads me to think the carbs need syncing, but Clymer does not have a pictural indicating the location of this adj.  There is a mechanical adj between the carbs that might be it.  This adj rotates with the throttle wheel.
Compression test are both in the 140-145 range.
Another test that might help.  When I remove the left plug wire and start it up, it idles at 2000rpm.  reversing this, removing the right plug wire and starting on left cyl and it barely idles at around 500rpm.  If I adj the left idle knob for 1200 rpm on left cyl, then reverse and start on right cyl, it idles above 3000 and up.
Intake manifolds look ok, also.
I know this is a jumble of info, any help is appreciated.

Answer
Bob,  First, get a baseline here. Check the valve clearances and see if they are tight, causing compression loss. Normal readings with wide open throttle should be around 175. If there is oil smoke and plug fouling due to oil consumption you will need to do more than a tune-up.

Second, CB360s didn't come with electronic ignitions, so you have a Dyna or other brand. A potential for the high idle condition is that the mechanical spark advancer is sticking/stuck in one position. Check function and recheck spark timing and advance readings, before you go further.

http://www.powersportspro.com/partsfish/login.asp will get you into microfiche illstrations for your bike, but the carb photo isn't very good. There is an carb synch adjustment setscrew between the two carbs for balancing the two sides. Probably need a carb tool to get to it, plus vacuum gauges/mercury stick to accurately synchronize them.

If the spark timing is working correctly and compression is decent, the carb function should bring the idle speed/mixture issues into focus. Be sure the carbs are clean inside, otherwise, blocked jets and passages will further frustrate you..

Bill Silver