2006 650i Brute Force - Carb issues - vent lines?

The bottom bowls have a single line on both of them. The allen head is bottomed out, and there's fuel still coming out of one side steady, and the other side just trickles out.

The top of each carb has another line, and they both "Y" into each other. Are they supposed to be plugged, pointing up, down to the ground?

The bike seems to be running on one cylinder. It takes LOTS of throttle to keep it running.

Once you let off, it dies. Starting takes for forever. While the bike is running half ***, there's a steady stream of fuel coming out of the bottom "drain" lines from the bottom of the bowels. . . . . that can't be right.

The bike has been sitting for a few weeks. Before that it ran like a champ with no issues at all.

Need a little help - thanks !

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Have you adjusted your valves lately for the hard starting issue? As for the hoses on the bottom of carbs,fuel is comming out more than likely due to a hung open float needle or improper float setting in the leaking carb - pull the carbs and give them a good cleaning - while your in there,record the sizes of pilot jets and main jets and the brand of jets - cause at some point your gonna wanna know that, this is also the easiest time to set the air/fuel setting on each carb,while there off the bike. The upper hoses are the carb vents - they should be y'ed together and run up high to the pod.

Quote:

Originally Posted by dman66

Have you adjusted your valves lately for the hard starting issue? As for the hoses on the bottom of carbs,fuel is comming out more than likely due to a hung open float needle or improper float setting in the leaking carb - pull the carbs and give them a good cleaning - while your in there,record the sizes of pilot jets and main jets and the brand of jets - cause at some point your gonna wanna know that, this is also the easiest time to set the air/fuel setting on each carb,while there off the bike. The upper hoses are the carb vents - they should be y'ed together and run up high to the pod.

ok thanks for he help. All the issues just started. 3-4 weeks ago I was slinging mud with no problems. No starting problems either.

The bike has a Dyno Jet kit on it. Local Kawasaki dealer installed it and cleaned the carbs when I first got the bike.

why would fuel be coming out of the vents while the bike is running ?

Theres the problem.....Dynojet.... If you have dynojet needles,most people say the needles have too much woble in them and that you should stick with the OEM needles.That's not the main issue though - a carb fuel problem exist,and the carbs will need to be pulled to check.Personally,I've never tried Dynojet due to alot of members on MIMB and Kawiriders,have not recommended those kits and to stay with Keihin style jets and factory needles.

Not sure why the fuel is coming out of the vents assumming you mean the vents on the bottom of each carb.More than likely the floats in the float bowls are set too high,or the float needles are not seating maybe from dirt or sludge or worn needle valve.What all did the dealer do when they were in there? I have a 750i,and I installed an electronic fuel pump - ever since I did that,and i run the bike hard or do wheelies,then sudden slowing down,the vents will leak about an ounce of fuel out.During normal riding,I don't have any issues.

the top vents that are y'd together have a steady stream coming out while its running.

Dealer replaced seats float needles, gaskets . . . whatever to make it wifey approved not to fail while on a ride.

pulled the bowels off and they have a #40 in front and rear

What's next to look at?

Well,I think I'm stumpped on that one too.I still feel that it has something to do with the float level setting.Lets hpoe someone with more experience chimes in soon,cause I don't think your problem is too common. I do know checking and setting the float levels can be a pain though because the bimetal of the float is so thin,it is easy to over adjust the floats.