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750f1 carbs

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kifer:
Had a strange one today, The last time out on bike she started to run a bit rough so got around to having a look today.
Found the new inlet rubbers I bought about a year ago so thought I would fit them as old ones a tad hard, Removed carbs now for a full check and tune while there off, guess what removed float bowl on number 4 and main jet was inside bowl ? has anybody heard of one falling out before?
 
Will fit back to bike tomorrow set up and vacuum have a feeling she is going to run ok again.
Cheers Tom.

Quick question, Is the starting point for air screw on F1 1.5 turns.

Spitfire:
Never heard of that one, here's some carb specs, the CB750F supplement to the CB750 Honda workshop manual gives 1 turn plus or minus 3/8.



Cheers

Den

mick:
Hi Tom i've had a pilot jet fall out on me probably my own fault for not nipping it up  ;), cheers Mick.

Waggles:
I concur with the book setting, my F1 carbs are at 1 turn out and she runs fine.

As for jets going AWOL, as the main jet isn't really used until 3/4 throttle not surprised she still ran ( albeit a bit rough )

My second ever bike was a BSA C15 which was ridden everywhere at full throttle ( anyone whos had one will know why ) and I had the main jet fall out, thing is all I noticed was a bit of a cough as you whacked the throttle open, apart from that it ran fine! think that says more about the crap carburation than anything!

cb750stu:
Should you put a smear of grease on the threads of the jets etc to stop seizure and corrosion ???
Regards
Stu

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