Toybreaker Posted January 4, 2006 Report Share Posted January 4, 2006 My duner has the stock 26mm mikuni's. After riding for a bit the carbs leak when sitting until i turn off the fuel. I have adjusted the floats more times than i can count and i think that the needle and seat is just worn out now. Has anyone else dealt with this? Quote Link to comment Share on other sites More sharing options...
2003LimitedBanshee Posted January 4, 2006 Report Share Posted January 4, 2006 It could be that the float needle and seat are worn out, but I would try to clean the carbs again before just replacing. I had an issue once with a sticky float, that I solved by removing the carb, removing the float bowl and spraying carb cleaner through the inlet where the fuel line attaches. The pressure and carb cleaner fixed the problem right away. The float needles are so sensitive that it is almost always some kind of obstruction keeping the needle from seating that causes the issue. It is possible for the needle/seat to wear out, but it is just usually not the cause. Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted January 4, 2006 Report Share Posted January 4, 2006 I had the same problem several years ago, and it ended up being the float needle and seat. I replaced both of them and problem solved. It doesn't take much to foul up the needle or seat. Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted January 4, 2006 Author Report Share Posted January 4, 2006 every time i adjusted the float i would clean everything with brake cleaner until it was spotless. There is nothing i can see that would cause it to leak. Well this can't be an expensive fix so I guess i am going to buy them today from Alba. Quote Link to comment Share on other sites More sharing options...
pimp559 Posted January 4, 2006 Report Share Posted January 4, 2006 Are you using 927 premix? Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted January 4, 2006 Report Share Posted January 4, 2006 When I replaced my float needles and seats, I couldn't see anything wrong with them either, until I put them under a magnifying glass. A little roughness or pitting is all it takes, to make them leak. Do you have an in-line filter between the tank and carbs? If not, I would highly recommend it. It will make a huge difference, on crap getting into the carbs. Quote Link to comment Share on other sites More sharing options...
Ultimateduner Posted January 5, 2006 Report Share Posted January 5, 2006 I had/have that problem with my stock carbs, I cleaned out the carbs with carb cleaner and messed with the bowls and it worked for a little while. Now its like a habit to turn off my gaswhen I stop. Once I leaked so much while stopped I had to go on reserve on a 10 mile ride. Hope you get that fixed, good luck Quote Link to comment Share on other sites More sharing options...
hotrodbanshee Posted January 8, 2006 Report Share Posted January 8, 2006 I just replaced both needles and seats on my stock carbs and mine still leaks from the overflows. I could not blow air through them with the needles closed. I can't figure out what is wrong. The carbs were perfectly clean. Always have to turn off the gas when not riding. Quote Link to comment Share on other sites More sharing options...
Banchetta Posted January 9, 2006 Report Share Posted January 9, 2006 I just replaced both needles and seats on my stock carbs and mine still leaks from the overflows. I could not blow air through them with the needles closed. I can't figure out what is wrong. The carbs were perfectly clean. Always have to turn off the gas when not riding. 456858[/snapback] Adjust the floats. Quote Link to comment Share on other sites More sharing options...
2003LimitedBanshee Posted January 9, 2006 Report Share Posted January 9, 2006 Adjust the floats. 456925[/snapback] Agree sounds like a float height issue to me if you checked the needle/seats for leaking. Also, it's not a bad idea to turn off the gas whenever the bike is not in use anyway. Quote Link to comment Share on other sites More sharing options...
hotrodbanshee Posted January 9, 2006 Report Share Posted January 9, 2006 (edited) I set my floats at 22mm. Should I go to 23-24mm? Edited January 9, 2006 by hotrodbanshee Quote Link to comment Share on other sites More sharing options...
Banchetta Posted January 9, 2006 Report Share Posted January 9, 2006 I set my floats at 22mm. Should I go to 23-24mm? 457091[/snapback] Try it, only one way to find out. Quote Link to comment Share on other sites More sharing options...
pimp559 Posted January 11, 2006 Report Share Posted January 11, 2006 Maxima 927 has a tendency to make my floats stick in cold weather. It could be that your oil in the carbs from the gas is making them stick. Thats while it will run for awhile good after cleaning the carbs. Then when you go to start it again after sitting for awhile it does it again. I believe the 927 gets a little thick in cold weather. Quote Link to comment Share on other sites More sharing options...
hotrodbanshee Posted January 11, 2006 Report Share Posted January 11, 2006 I know for sure the oil is not the problem. I live in Tx where it gets 100 degrees. Quote Link to comment Share on other sites More sharing options...
rocketboy Posted January 12, 2006 Report Share Posted January 12, 2006 why replace internal parts on those wornout baby roundslides carbs ? i say save yourself alot of headache ,ebay the pos carbs and get a decent set of 33PWK carbs that actually carburate correctly Quote Link to comment Share on other sites More sharing options...
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