SOHC.co.uk Forums > CB350/400
Carbs overflow
DaveN:
Thanks for the advice so far folks.
I have been using the fuel tap dodge when approaching home, but unfortunately, when it's open, it's pouring out at every traffic stop (traffic lights, junctions etc.) and I'm not at all convinced that it's not overflowing whilst driving too - my last full tank of petrol lasted approximately 75 miles before I had to go to reserve! I've also tried running the carbs dry during a run (petrol tap off until the engine cuts) in the hope it might dislodge any crud but no luck there.
Nurse Julie:
--- Quote from: DaveN on June 16, 2020, 02:03:37 PM ---Thanks for the advice so far folks.
I have been using the fuel tap dodge when approaching home, but unfortunately, when it's open, it's pouring out at every traffic stop (traffic lights, junctions etc.) and I'm not at all convinced that it's not overflowing whilst driving too - my last full tank of petrol lasted approximately 75 miles before I had to go to reserve! I've also tried running the carbs dry during a run (petrol tap off until the engine cuts) in the hope it might dislodge any crud but no luck there.
--- End quote ---
And you are 100% certain you have set the floats correctly at 21mm with the tang just touching the needle and not depressing it? . I'm sure you have but there really is only 2 possibilities, float valves not seating and floats set incorrectly. With only 75 miles to reserve, it does sound like it's pissing out as you are riding.
K2-K6:
This recent thread may help out
http://www.sohc.co.uk/index.php/topic,22451.0.html
It seems fairly common with many of the kits to run into this problem currently, should be ok after more intervention.
DaveN:
No Julie, I'm not at all certain as I did not do the rebuild :(
I'll check all settings when I've got them off again. The new bits are in there, so I'd be surprised (nay, disappointed) if they were not set up properly, but stranger things have happened.
Looks like I'll be joining 'Carb 101' ;D
TrickyMicky:
I know that I've mentioned this before, but, after a short non-riding period, (11 Years!!) I suffered on many occasions with incontinent carburettors. In my case it turned out to be the little pivot pins that the floats are fixed to. Modern fuels allied to non use resulted in them being very cruddy. They were given a very good polish with the finest grade wet and dry I could find, all replaced and rewarded with nice floppy floats, and from then on, yes, fuel tap off well before coming to end of the last ride of the day. Best of luck, you owe it to your knuckles if nothing else! Regards, Michael.
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