Fuel leak
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Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
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carpman
- NWAA Supporter
- Posts: 181
- Joined: Sat Jul 17, 2010 9:18 pm
- Bike owned: 1990 nc30
- Location: Se London
Fuel leak
need some help please
Right firstly some history
I bought the bike 18 months ago and she has always had the smell of fuel around her not bad but enough.
This last week i have had the carbs off and done some work on them clean re-jet and drill ( using carb jetty didy guide) i did fit new float bowl seals i was hoping that was where the leak was but after putting back together i still had a leak so i bought new carb mounts but i stil the leak remains it seems to be somewhere near the right rear carb as i have seen the fuel gathering on the bottom of the float bowl before it runs down onto carb mount but i dont know where else to check ????
could it be the swivel joint between the 2 rear carbs ??
any other suggestions
Dan
Right firstly some history
I bought the bike 18 months ago and she has always had the smell of fuel around her not bad but enough.
This last week i have had the carbs off and done some work on them clean re-jet and drill ( using carb jetty didy guide) i did fit new float bowl seals i was hoping that was where the leak was but after putting back together i still had a leak so i bought new carb mounts but i stil the leak remains it seems to be somewhere near the right rear carb as i have seen the fuel gathering on the bottom of the float bowl before it runs down onto carb mount but i dont know where else to check ????
could it be the swivel joint between the 2 rear carbs ??
any other suggestions
Dan
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skinnydog0_0
- NWAA Supporter
- Posts: 1213
- Joined: Tue Apr 20, 2010 9:07 pm
- Bike owned: Penny Farthing
- Location: Pembrokeshire West Wales
Re: Fuel leak
have you checked the drain screws are all okay and not cross threaded?
An NC is for life, not just for Christmas!
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Cammo
- Site Supporter
- Posts: 4505
- Joined: Thu May 01, 2008 12:35 am
- Bike owned: NC30
- Location: Melbourne, Australia
Re: Fuel leak
It's usually a sticking float needle that causes the carb to fill up and overflow.
You might have to take them back off and take a look at the float needle valve to see that it's working smoothly and not sticking.
You might have to take them back off and take a look at the float needle valve to see that it's working smoothly and not sticking.
"It's just a ride" Bill Hicks
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carpman
- NWAA Supporter
- Posts: 181
- Joined: Sat Jul 17, 2010 9:18 pm
- Bike owned: 1990 nc30
- Location: Se London
Re: Fuel leak
I'm pretty sure i have sorted it now !!!!
i took the the air filter mounting plate off (and what a pig that was to take off and an ever bigger pig to get back on) the top of the carbs which revealed fuel on top of the the right rear swivel fuel joint so i decided to take fuel pipe off and check it over , the pipe looked fine but when i squeezed the end that contected to the swivel it was very soft compared to the other end so i got some new pipe and fitted it , that seems to have sorted the leak had her running for ten minutes on stand and left over night and no sign of fuel .......
well i can now put her back together
i took the the air filter mounting plate off (and what a pig that was to take off and an ever bigger pig to get back on) the top of the carbs which revealed fuel on top of the the right rear swivel fuel joint so i decided to take fuel pipe off and check it over , the pipe looked fine but when i squeezed the end that contected to the swivel it was very soft compared to the other end so i got some new pipe and fitted it , that seems to have sorted the leak had her running for ten minutes on stand and left over night and no sign of fuel .......
well i can now put her back together