Topic: CB550 Help! (Electronic Ignition/timing)

[Jcop.550]

Looking for help on my 78 CB550. Just rebuilt the engine and rewired the whole bike from scratch for the first time and everything is working as it should.

I also installed a PAMCO electronic ignition. The bike is getting good spark and fuel but it does not want to start. With the electronic ignition, should I be able to install it and start the bike and then set timing afterwards? Or set the timing before? When trying to start it occasionally makes a “whomp” and backfire sound.

Trying to weigh out my options to get to the bottom of this. Any help or advice is appreciated


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[bryanj]

You have toget the timing close for it to start. Never seen a pamco so not sure what you change and how it works but setup should be in the instructions

[Jcop.550]

You have toget the timing close for it to start. Never seen a pamco so not sure what you change and how it works but setup should be in the instructions

I did that before giving it a try. I’m gonna double check and make sure I’m doing it correctly. Hopefully it’s something silly I messed up on


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[BomberMann650]

Sure you got the coil leads headed to the right pair?

iirc, the pamco plate and advancer are marked.  So you can get things set up at tdc within a degree or two of fire.  The timing light helps to verify the advancer mechanism works above 3000rpm.

[PeWe]

Rotor correctly mounted, not 180* wrong?
If it is, swap the wires to coils and see if it starts.