Ive taken the tank off, replaced the plugs and air filter and ive put the tank back on and its not starting? I dont think the tap is releasing any fuel? its firing just not starting

is the vacuum pipe back on the carbs and pedcock?

all the pipes i have disconnected were reconnected in the right place. all i disconnected was the fuel pipe running from the tap and the thinner pipe which also came off the tap, is that the pipe? or is that a breather?

The vacuum pipe is MUCH smaller than the fuel and breather/overflow pipes. It's not much bigger than the long pipe you might find attached to the nozzle of a lubricant spray, and is a hard plastic material (mine is, anyway). The other pipes are rubber.

I presume it has run recently?
If the carbs haven't been removed or drained, there will be enough fuel in them to fire up...
It's not the kill switch is it?

Have you actually checked for fuel flow?

Phil

it has been run about 2weeks ago fine, and the carbs werent removed or drained, it is also not the kill switch (which is a shame, although i would have felt silly haha!)

It runs if i pour abit of fuel down the fuel pipe into the carbs until the petrol runs out. I will check the vacuum pipe and also the tap.

Thanks for all the replies, i will let you know if it works after christmas. Have a good one.

I changed the vacuum pipe as I found a tear in it and it now seems to be running okay, thanks for the suggestions :)