howye gettin on got an nc24 a non runner parked up for about nine years put in some new fuel turn it over and petrol pisses out the carb overflow and she wont start . put a drop of petrol in the carbs and she fires and runs fine anyone have any idea why its coming straight out the overflow im stumped on this im a car mechanic so this bike craic is kinda new to me and im to young to have worked with carbs any help or advice will be much appreciated

cheers
owen

strip them down and clean them out.

There probably gummed up with old petrol so the floats are not moving and shutting off the flow of petrol, which will make it come out the overflow

Howdo Owen,

Welcome onboard.!

Sound slike yor carbs need to come off (all in one go) and need a clean. They have a float bowl which uses a float and a needle to set the fuel level - if the float needle is blocked with crap or gummed open then the fuel pours out the overflow.

AN easy fix and as it has sat for ages..you need to get in and clean them, Have a look for Dataracer's guide to carbs on here..

jobs a good un.

Beat you to it

lol..I was welcoming our man in too...you were just getting down to the nitty gritty...

thanks for the welcome guys will take the carbs off so and get cleaning kinda thought it was the carbs alright my fuel tap also leaks out the small pipe on the side of it not the vacuum pipe the other one anything cause this or can i just block it up

owenf wrote:thanks for the welcome guys will take the carbs off so and get cleaning kinda thought it was the carbs alright my fuel tap also leaks out the small pipe on the side of it not the vacuum pipe the other one anything cause this or can i just block it up

Yes thats very bad!

The fuel tap is vaccumn operated, even if you have it set to 'on' it'll turn off when the engine isn't running.. if it's leaking from the vaccumn pipe you'll find the diaphragm probably has a hole in it.

There not avilable new anymore but fortuantly the tap comes apart.. take it to bits and you might be able to repair the diaphram :D

Some super glue / patch of rubber, bicycle repair kit etc etc.. get creative!