Right I have a F1 31k when I bought it it needed going through, so fitted a battery and pulled the carbs pulled out emulsion tubes and idle and main jets and stuck them in my ultrasonic cleaner, started straight away, and engine sounds fine on choke, turn the choke off and it dies, open the throttle just a baaaaaa noise, but if I keep it over 4000 rpm it will rev without choke, one thing I didn't check is the float height could that be a issue?
I need I guess to pull the air box to see if I have a mouse living in there, the other thing maybe sucking in air?
anybody come across anything like this before? I have set the air/fuel screw 1 and half turns out.
sorry i phrased that wrong i ment how you personally do it as in the correct wires / set meter at ect . i have done a test and im getting all correct but i have been told that you need the coils warmed up with a hair dryer and the engine warmed up to get correct readings have you come across this ?
i also have a problem similar to fozzy here (hope its ok to butt in fozzy ) my lc250 is very hard to start and when it dose its on 1 cylinder then the other shoots in . it takes about 10/15 strong kicks then just starts but when both barrels are running it wont rev clean and also at 6k revs on the road it just stalls at that and wont go on even changing down . iv done carbs cleaning , filters on fuel lines just in case , changed to norbos banshee coils , took baffles out no blockage , swapped over cdi from a running bike , oil pump was revamped by arrow and new throttle cable as it seemed to smoke alot and i thought it was chocking itself so set up to arrows alignment as per instructions , all of this to no avail . last thing im told it can be is windings breaking down as i THINK it was mutts nutts said that he was having alot of lc250s with the same issue so i did the meter test but all readings are seemingly good , any other advice on something im missing please ? ta
sorry i ment the brass balls . so iv just taken the carbs apart and checked all jets and all clean but looking at the balls id say someone had them out at some stage as i can see a type of glue around them but something i noticed this time round that i missed before ie on the right carb looking at the back in hole on the left is open , brass ball , hole on the right is open yes ? well this one was full of crud or black sealer or something what affect could this have ? , other carb just around the brass ball with a magnifier glass you can see a tiny rim / groove / gap maybe letting air in make any difference you think ?
if 250 carbs, check what main jet is fitted, I've had to "down" jet, yes that's correct "down" jet quiet a few recently, not sure why, but those fitted with 190 mains where running horribly, some ended up at 180 and some at 170 mains, still think your windings or the pickup could be on their way, but check the main jet sizes as well