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Hi everyone!
I'm new to this forum and so far I've been impressed by the wealth of information here.

I recently purchased a 1974 CB360 in pretty good condition. When I start it up, I'm getting some backfire and it wont stay idling. The previous owner had mikuani carbs installed and professionally tuned, along with new spark plugs. It came with shorty pipes for exhaust and also has fresh premium gas in it. I am new to working on these older bikes, however I'm mechanically inclined and I have the time to do the work. I suspect the exhaust or the gas, but please let me know if I'm clueless.
Thanks
 

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Welcome to the forums! You will find a lot of useful information and good help when you need it.
Backfiring could be caused by an overly rich idle mixture, but I would first look at the ignition points and make sure they are clean and not sparking due to oil contamination or a faulty condenser. Next I would confirm with a timing light the ignition fires right on the LF and F marks on the rotor.
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