classic motorcycle forum

If anyone has one they're not using..
Thanks
Gary

the o ring under the float chamber top is pointless as the fuel never reaches that level.

It does sound as if you are having a problem with your user habits though.

Someone recommended I put the O ring in, not to form any seal, but to raise the top in case it was somehow preventing the float from rising enough to stop the fuel, because a while back fuel was pouring out the top of the float chamber.

I have been and started it again and it ran fine with no leaks, I did as suggested and only held the float tickle thing down a couple seconds.

I've attached some pics of the carb. You can see the O ring under the float chamber top, I was told that may help stop it flooding out the top, which it has. You can also see the new red fibre washer in the nut, it was only cheap, about 20p, but I had assumed they were all the same..
I was thinking, when I tickle the carb and it floods out the top hole, before starting, will that mean that until I start the engine, fuel will always leak out of the jet hole in the thread of the main body of the carb, making it appear that it's the thread that's leaking? The last time the carb was leaking, it stopped leaking once I started the engine..
When I remove the top cap from the float chamber, with the fuel tap on, the fuel stays level.
I am more into old diesels than petrols so I have little experience of carbs, and I may end up having to take this to someone who knows what they are doing.

If it means anything; nothing leaks out when I turn the fuel tap on, until I tickle the float..

Would it be worth fitting 2 washers about the banjo, to lower the float chamber?

I've fitted a new washer, but that hasn't stopped it. If the float level is too high, will that allow fuel to leak out from that slot in the thread i can see?
Gary

I guess the hole could have been blocked but been cleared when I blew through it.. Taking it for a ride will confirm whether or not the problem has been sorted..

Hi, I went to start this as the weekend and when tickling the carb no fuel came out of the hole in the top, which it normally does.. I took the top off the float chamber and it was about 2/3 full of fuel with the bowl floating. I pushed the bowl down, expecting the chamber to fill up, but it stayed the same level. So I took the bike for a spin, as it was sunny.. It started misfiring after a short distance. When I got back I checked the float again and there was no much fuel in there. I drained the tank and checked the tap filter, which looks okay. There was some muck in the fuel but not loads, though the last bit to drain out was cloudy...
But the carb is still the same, no fuel flooding when tickled. Am I missing something? Suppose I need to take the carb apart again. The main body of the carb is still dripping fuel, but it stops once the engine is started..
Regards
Gary

Half the problem is this bike was owned by an elderly chap and was rebuilt 8 years ago and then he never rode it. He gave it to his son, who sold it straight away. It really needs recommissioning, which is what I'll have to do. Luckily I like tinkering..

The alternative, to get/keep the bike running, is to use separate levers. Cheap and cheerful.

I have found a site that sells a nice single lever that has a longer arm than usual at £16. Could use that for throttle and leave the choke where it is.