660 float levels. Who is good with carbs? - Yamaha Raptor Forum
 

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Old 07-08-2012, 07:08 PM   #1 (permalink)
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Default 660 float levels. Who is good with carbs?

I am working on a 2002 raptor 660 stock everything. I set both float levels at the .51 inch as stated in the chiltons manual. the left carb bowl will overflow and fuel will pour out of the drain tube. I took bowl off and filled it above the drain screw so I know the drain is not leaking. I set the float at .58 inch and it still does it. the float has no holes or is filled with fuel. New needle and seat, o-rings jets etc.

Is this normal? should I keep lowering fuel level until it stops overflowing? Is there there something I might be missing?

Thanks
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Old 07-08-2012, 07:55 PM   #2 (permalink)
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Carb mods and Clear tube method explained this might help you. No, its not normal for them to overflow. Your sure the needle and seat are good. Im sure someone smarter than me will be along to help you. Good luck.
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Old 07-09-2012, 10:11 AM   #3 (permalink)
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Needle and seat are new. But i guess that doesn't always mean good.
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Old 07-09-2012, 09:29 PM   #4 (permalink)
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I suggest the clear tube method. Only because it's real world and it worked for me. I had to replace my valve and seats. Never had an issue since. Search the clear tube method to adjust your floats. If they don't work check your valves and seats for sealing problems.
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Old 07-09-2012, 11:59 PM   #5 (permalink)
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Quote:
Originally Posted by 686cody View Post
Carb mods and Clear tube method explained this might help you. No, its not normal for them to overflow. Your sure the needle and seat are good. Im sure someone smarter than me will be along to help you. Good luck.
I like.... That is a true way to get you actual fuel level height. I am going to get a clear tube tomorrow.then test. SO I just see the float unltil 3 mm above the rowl seam? THEN THATS what I will do... Sorry,,., the ambien and margaritas are stratring to work together. whhoppoopop. GROOOvvEEEEEE


and qiff the fuel level keeps climbing, there is a needle an dseat issue.
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Old 07-10-2012, 05:52 AM   #6 (permalink)
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Quote:
Originally Posted by AllYamahaMan View Post
I like.... That is a true way to get you actual fuel level height. I am going to get a clear tube tomorrow.then test. SO I just see the float unltil 3 mm above the rowl seam? THEN THATS what I will do... Sorry,,., the ambien and margaritas are stratring to work together. whhoppoopop. GROOOvvEEEEEE


and qiff the fuel level keeps climbing, there is a needle an dseat issue.
You may have damaged an oring when you installed the new needle and seat.......or it is defective. Try hooking a container of fuel to the carb without the bowl on and hold the float up manually, watch where the fuel comes from.............
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Old 07-10-2012, 05:54 PM   #7 (permalink)
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Old o-rings under the float valve seat? Often, when cleaning the carbs, the old o-ring becomes damaged (sometimes just from carb cleaner) and will then leak fuel, causing overflow - always replace these o-rings when cleaning the carbs.
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Old 07-10-2012, 10:36 PM   #8 (permalink)
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Old o-rings under the float valve seat? Often, when cleaning the carbs, the old o-ring becomes damaged (sometimes just from carb cleaner) and will then leak fuel, causing overflow - always replace these o-rings when cleaning the carbs.
Thanks!

I did replace with new but it could be damaged. It didn't feel funny when I installed it but with my luck it will be something very simple like that... I will check that tomorrow. Then I will do the clear tube method and file the float stop. If that does not fix it I am plugging the overflow tube.... JK

Thank you everyone for the advise.
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Old 07-11-2012, 06:11 AM   #9 (permalink)
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Quote:
Originally Posted by AllYamahaMan View Post
Thanks!

I did replace with new but it could be damaged. It didn't feel funny when I installed it but with my luck it will be something very simple like that... I will check that tomorrow. Then I will do the clear tube method and file the float stop. If that does not fix it I am plugging the overflow tube.... JK

Thank you everyone for the advise.

Plugging the over flow tube will cause more problems...............
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Old 07-11-2012, 08:14 AM   #10 (permalink)
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Plugging the over flow tube will cause more problems...............
JK = Just Kidding
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