Re: 76 CB360, Of course...this sucks.
From extensive reading and working w PJ. On an air cooled twin. Keeping in mind the richness of the fuel is used to help keep the engine cool.
my bike idles smoothest strongest and fastest at 12.5 to 1
Ideal is....
Acceleration during WOT should be 12.5 to 1, with a 107 secondary I have been at 13.5 - 14+ to 1 and she sounds flat and has power loss. I have a 110 in now getting 11.5 to 1.
Cruising at 60mph in 6th should be 13 to 1. Mine is cruising at about 11.5 to 1. If I lean one jet size. She will die on take off and I loose control of A/F mix, and she will be too lean.
the air/ fuel adjusters are fed through the pilots which are fed through the main primaries
So by leaning the main primary will ultimately effect both the pilot and air/fuel at idle.
Which is fine. Since A/F is adjustable for idle. However get her lean enough to run good at 3500 rpm and she will be too lean to feed the pilot and die on take off. Get her lean enough and lose control over A/F adjusters. yet still have a rich area at 2000-2200 between pilot and primary. Since needles aren't adjustable AND sizes aren't readily available. Again, she gets a flood when slides begin to rise between 3500 and 4000 but will recover at about 5000 and be ready to use what she is being fed.
the main secondary is metered by the needle.
Other than stock sizes. pilots, main primaries and needles are impossible to find.
I ordered my kits straight from Japan a couple years ago and now I can not locate them for sale anywhere anymore.
I have a buddy, Stuart making custom jets for me. But, I just sent PJ a package of parts to modify. I am gonna wait for these to come back and report my o2 findings to him. then we will go from there.
And I have drawn up a couple needle designs for Stuart to make for me.
Its very time consuming and $.
You have to go to Thaw. FYI, there's a NOS head on eBay right now.
