Currently my Super Rocket has a Concentric
carb on it that runs and pulls very well. That carb has been on it since my dad bought it in 1977. But I'm feeling like getting a Monobloc
and putting it back on the bike as it's the correct carb for the bike and it just looks nice to boot.
I've scoured the internet and only found a few suggestions, most of which go back to the early Roy Bacon, Eddie Dow, BSA bulletins etc. But like most people say it's going to be different with modern fuels. So I AM FULLY AWARE :-) that I will likely have to fine tune the main jet etc. But what I'm looking for is what are people "currently running" on their super rocket with modern fuels????
My goal is to order the carb with a main jet that is close to what most people are currently running with modern fuels and then order a few jets up and down so I can fine tune it from there.
Literature is showing anything from a 290-420 main jet and I know some of this has to do with the changes made to the engine and for some reason where the motor was shipped etc.
Yes every engine is a little different, no two engines are exactly alike. Here's what I have for a set-up currently
1958 Super Rocket
Later style alloy head with larger intake valves
Boyer ignition- (properly set-up and strobe timed)
I have access to high test non-ethanol fuel (not looking to start an ethanol thread here :-)
Standard factory style exhaust
air filter- with this new carb I was going to go with either the fully exposed cone or round style in chromed ring?
I plan on ordering the Monobloc
389 (1 5/32")
If there's something I missed here that's relevant let me know.
Can't wait to hear where people are having success, I'm sure there has to be a general range/average of what works well in this set-up with modern fuels.
So let's hear it, what's your jet size?? And/or anyone have any relevant trial and error stories?
Thanks in advance-Mike