Honda CB360 Carb Tuning...fun

[krukster86]

So now that my cafe "modding" is completed for this riding season, I am 100% focused on having a rideable bike. I am having issues with my carbs. Background info: Bike is a 1975 CB360, it has CB450 carburetors on it (CV type Keihin 5-speed 14H carbs). Jetting was set as follows: slow jet #38 and Main Jet #150. I am running the bike without air filters and I have EMGO Dunstall replica pipes (essentially straight pipes).

I thoroughly cleaned out the carburetors recently and started the bike up. Here is what I am noticing:
It takes about 5-10 kicks to get the bike started. When it starts up, it takes about 2 seconds to keep a consistent idle speed.
When synching the carburetors, the air mixture screw had to be all the way in for maximum RPM even though the carbs were cleaned.
When giving the bike some gas, there is stumbling and I hear a strange noise from the carburetors. I looked at the slides and they just jiggled up and down when I would roll on.

I got word that the main jet #150 was WAAAAY too big for a 360. Also I was told that the slow jet probably needs to be upped in size if idle speed is iffy and the air mixture screws behave the way that they do.

 

[krukster86]

A while back I had purchased a Keyster CB450 carb rebuild kit (meh quality I know) and I replaced the slow jet with the Keyster one of the same size and put in a #130 main jet that came with the Keyster kit. No change. Spark Plugs look like this:

Looks like I am running rich

I am trying to find slow jets that look like the ones I have:
#38 slow jet (22.5mm in total length):

But I am not seeing them anywhere!
However I am wondering if I should just drop $ on the jets in the Keyster CB360 kit (#100 main and #35 slow jet) which have the slow jets in that size...

For my situation I am still a bit confused. Should I be increasing or decreasing the size of the Slow jet? How about the main jet?

Thanks in advance!