BlueKsev Posted July 1, 2011 Report Posted July 1, 2011 Ok so dad drove the ke70 to work on monday. As soon as he got it home it stalled itself when idleing. After starting it back up again it idled for a few seconds, then the revs dropped and it almost stalled but then they rise to the normal idle again and it keeps suddenly dropping revs untill it finally stalls itself. I thought there must be some dirt or grit in the idle jet. It was fine in the higher revs and there were no problems when you drive it but as soon as you stop at traffic lights your constantly revving it so it wont stall. I took the carb off yesterday, cleaned it inside and out and cleaned the primary and secondary idle jet. I also took the top off and cleaned out the primary and secondary main jets and put them back in. It did the same funny idleing thing when i bolted it back up so today i did the exact same thing but used proper carby cleaner. I also ran the carby cleaner through the fuel lines and channels. Got the carby back on and bolted up just an hour ago. After it finally started it revved up to 4000rpm+ so i quickly shut it off. After a bit i tried again and it went to 4000rpm and after about 10 seconds the revs dropped and almost stalled then revved right up again and then dropped right down almost stalling again and it kept doing this till i turned it off. It sounds like it going to keep doing this everytime i turn it on so there is no way it is driveable. What is wrong with it? Any help would be appreciated thanks guys. Quote
beigerolla Posted July 1, 2011 Report Posted July 1, 2011 Any air leaks at the carby or inlet manifold? ? ? Quote
BlueKsev Posted July 1, 2011 Author Report Posted July 1, 2011 Well i glued up the weber adapter plate at the top and bottom and made new gaskets for it however there is a complex gasket in the weber itself which looks like it has seen better days so il check that out and have a look around the manifold itself tomorrow cheers man. Quote
PMP020 Posted July 1, 2011 Report Posted July 1, 2011 correct size jets for the engine capacity ? sounds like its over fueling. cheers, scott Quote
altezzaclub Posted July 1, 2011 Report Posted July 1, 2011 Is the float level adjustable? Needle & seat clean? Otherwise a leak seems likely. Is it only when its sitting in neutral, or does it play up when its under load and you're driving? Quote
BlueKsev Posted July 1, 2011 Author Report Posted July 1, 2011 I don't think the float is adjustable? doesnt look to be anyway. Doesnt play up at all under load it is fine. Yeah just at idle with the clutch in or neutral. Ok so i feel a little stupid. When putting the carby back on, i bolted up the accelerator cable unit slightly wrong. This left the butterfly valve in the secondary throat full open at all times :blush: So i fixed that minor error up, but it still drops revs all the time and will stall if not constantly under acceleration. I had a look down the first throat while it was running and the fuel isnt being sprayed to mix with the air well. Its sort of dribbling and spluttering out of the jet instead? Quote
BlueKsev Posted July 1, 2011 Author Report Posted July 1, 2011 correct size jets for the engine capacity ? sounds like its over fueling. cheers, scott Yeah jets are fine, it was running spot on before dad drove it to work :hmm: I would say the idle jet has grit or something in it but i've spent a fair while cleaning it. Il try and make up a new gasket for in the weber itself tomorrow but its a very complex shape.. I'm a little low on coin at the moment too so I'm trying to avoid the cost of a new gasket thats why i make them up haha Cheers Ben Quote
altezzaclub Posted July 1, 2011 Report Posted July 1, 2011 it still drops revs all the time and will stall if not constantly under acceleration. I assume that means it will cruise at 60kph constantly.. ie- your not running on the pump jet. So its got to be in the idle circuit or an air leak. When its not under load then it takes a small change in fuel or air to make a big difference in the revs. Hopefully its that gasket that's causing it. Quote
BlueKsev Posted July 2, 2011 Author Report Posted July 2, 2011 Yeah its fine cruising in gear. There may be a slight jumpyness in the lower revs though. Alright finally finished the gasket and got it in. Same idling problem still. Il clean all the jets and everything later this afternoon again Quote
ke20rolla Posted July 2, 2011 Report Posted July 2, 2011 Have you adjusted the mixture screw? Maybe it's running to lean and needs to be wound out half a turn or so that it gets a bit more juice when idling. Quote
BlueKsev Posted July 2, 2011 Author Report Posted July 2, 2011 I'm about to go pull it off again but il give that a go before i do cheers man Quote
BlueKsev Posted July 2, 2011 Author Report Posted July 2, 2011 Fixed :dance: Wound out the mixture screw a half turn, started it up and it ran fine. Wound it back in while it was running and it ran fine too..? Runs better wound out a bit though. Well I'm not sure how it happened, or how it was fixed because i didnt touch the mixture screw before it went wrong. anyway its fixed now and the carby is looking brand new haha Cheers Ben Quote
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