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Float needle / seat issue?

allojohn

allojohn

Forum Sage
Past Site Supporter
While parked I've noticed fuel drains from the hose from the petcock to the carbs over a two three day period. This isn't normal, right?

I fear it's draining into the engine as there's nothing coming out the pods. I'm keeping an eye on the engine oil level, no noticeable difference and I've been sniffing the oil for gas, but again nothing.

So, do I have a needle which is not seating properly?
 
It's normal for fuel to evaporate out of the float bowls. My guess is this is what's happening.
 
Don't worry with VMs - if the carb overflows the fuel will run down the drain hoses fixed to the bottom of the float bowls.

As for losing that tiny amount of petrol - it's either evaporation in the carbs or the float valves are letting fuel through. However, if it's the latter, again don't worry. The float valves weren't intended to hold fuel back like that, which is why the bike is fitted with a vacuum tap.
 
Nessism said:
It's normal for fuel to evaporate out of the float bowls. My guess is this is what's happening.
Click to expand...


hampshirehog said:
Don't worry with VMs - if the carb overflows the fuel will run down the drain hoses fixed to the bottom of the float bowls.

As for losing that tiny amount of petrol - it's either evaporation in the carbs or the float valves are letting fuel through. However, if it's the latter, again don't worry. The float valves weren't intended to hold fuel back like that, which is why the bike is fitted with a vacuum tap.
Click to expand...

Thanks guys, set my mind at rest. Had I not had a clear hose I wouldn't have noticed and just gone about my business. Much appreciated.
 
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