Hi all, My Ludix one has been running fine and is to some extent... Apart from the carb keeps leaking from the float chamber overflow pipe. The float itself looks okay, so what can cause this issue??? Any thoughts and suggestions would be appreciated Mark
sounds like you need to give the carb a good clean and check the little shut off needle on the float and seat that it sits in.try not to bend the arm the pin sits in cos you'll sod the float height up and get dodgy running.once you've done it,check it works by tipping the carb upside down and blow though the petrol pipe.. if you cant blow through it,its working.if it still leaks after doing that,you have to reset the float hight.
Thanks hairyjim. That sorted the leak, but now it won't tick over without cutting out. The idle screw seems to make no change either.
oh dear.will it tick over with your hand holding throttle steady.I'm assuming it ticked over before you stripped it.
Yeah, it was ticking over before and ran perfectly. It runs and revs now, but won't idle on its own. It will with a slight twist on the throttle. Could the auto choke be broken maybe?
It's probably about 1.5 turns out from being fully in. I have screwed it in further with no changes, I then put it back To where it was, then continued to unscrew a little more. Still cuts out instead if holding its idle. Odd!
I think you might be adjusting the wrong screw.turn the one your turning in till it stops then out 1.5 turns,then turn the other one in until it hold a tick over .you may have to do a bit of fiddling after you get it stable but merlin can guide you though as he's had a lot more gurtner carb experience than me.
Hairyjim is on about the screw that doesn't have a spring on it. That's the idle mixture screw and this is the one that should be tightened in (gently) then turned out 1.5 turns. Then you adjust the fast idle screw (the one with the spring) until you get an smooth idle speed (should be about 1500rpm). Has that explained things any better?
The screw that needs the special tool needs to be 1.5 turns out, that's the idle mixture screw. A small flat-bladed jeweller's screwdriver, the sharp tip of a narrow knife or the cap of a Bic Biro should be able to adjust the special screw. The other screw with the spring adjusts the idle speed, not the mixture.
looks like your gonna have to adjust it from the cable adjuster.should have one at bars or one at the carb end.
You can't adjust the idle mixture with the cables, Jim. You might be able to adjust the idle speed, but the mixture needs the special screw adjusting. @ Mark White Have you checked that the choke operates properly, that the choke chamber is clean and that the jet is clear? Rough idling can sometimes be down to crud in the choke chamber.
aaarr.think I got it now merlin mate..so if his mixture needle is right and his choke is naff...hes only ganna have a good steady idle after his lumps warmed up and he can adjust the ide screw with out having his rev cut.but his revs are gonna be high if he does that and then fixes his choke..im assuming..so he can check the naff choke theory that way.yer? Readjust after fixing the choke..???
Yeah, that's what I'd do, as the idle mixture should be factory set and shouldn't drift, unless the choke plays up or the air filter gets modified or changed for a high flow one. Check and sort the choke out then move on to see if the mixture needs adjusting. I'm playing a hunch that the choke is the issue.
Thanks guys. I'm working away for the weekend so will check that out as soon as I can. Watch this space
