Motorcycle carb problems - need help
#1
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Motorcycle carb problems - need help
96 Honda Rebel 250
Bike was running rough. Pulled the carb off and cleaned a bit on it (spraying stuff out with carb cleaner). Put everything back together.
So, this is where I am now. The carb fills up with fuel and runs out the air cleaner (guess this means the needle valve is stuck or something. Also, the drain line is leaking fuel. I have no idea why it is leaking, maybe some trash in the metal on metal sealing surface?
Edit:
My fuel / vent lines were swapped. Duh!
Still need to fix throttle issue that I caused when I took everything apart.
Bike was running rough. Pulled the carb off and cleaned a bit on it (spraying stuff out with carb cleaner). Put everything back together.
So, this is where I am now. The carb fills up with fuel and runs out the air cleaner (guess this means the needle valve is stuck or something. Also, the drain line is leaking fuel. I have no idea why it is leaking, maybe some trash in the metal on metal sealing surface?
Edit:
My fuel / vent lines were swapped. Duh!
Still need to fix throttle issue that I caused when I took everything apart.
Last edited by rmcelwee; 07-26-2013 at 02:17 PM.
#3
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Well, I am a dumb ***. I had the fuel lines hooked up wrong. The bike runs much better now but will not run past half throttle. I see there is some sort of set screw towards the bottom and I am wondering if it is a mixture valve. I turned it and it really didn't make much difference. When I pulled the carb back off I took the bowl off and cleaned up a bit. The float and everything looked good. That is when I noticed that the bowl was vented to atmos (where I had the fuel supply going. Anyway, I need to get this thing tuned now so it will run wide open. It ran fine wide open before so I just have to figure out what the hell I have screwed up.
Going to edit my first post to get rid of misinformation...
Going to edit my first post to get rid of misinformation...
#5
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Not much luck on the tuning search (seems there were several different carbs on them). I do notice that if I add fuel with the fuel enricher (not a choke - I guess this is what the extra needle valve are for) it will run fine. I think it is just starving for fuel through the main needle jet.
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I'll pull the carb for the 3rd time tomorrow and clean it again. Got to be a fuel blockage. I was so tired today (changed the struts out on the Geo Metro earlier) that I just couldn't work on it any longer.
I'll report back.
I'll report back.
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It was running OK but idle was funky. Cleaned it and made it run like ****. Good tip on the compressed air. I think I need to take everything back apart and do a better job. Was too busy and trying to hurry.
Body is sore from working on the car/bike all day so I might take it easy today and revist in 24 hours. I'll let you guys know what I find.
Body is sore from working on the car/bike all day so I might take it easy today and revist in 24 hours. I'll let you guys know what I find.
#9
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OK, pulled the carb 5 times total (took over an hour the first time due to the tight space - now I can do it with my eyes closed). The first time the diaphragm was a bitch to get back in so I didn't mess with it on #2 - #4. Took the top off the carb on cleaning #5 and found the diaphragm was pinched but not broken/ripped. Yah! Put it back together correctly and the damn thing runs great now.
BTW, the reason I didn't mess with the top of the carb all those other times was that the diaphragm looked stretched out to me and it was really hard to get back in. I was scared to rip it with no parts available (cheaply).
Thanks!
BTW, the reason I didn't mess with the top of the carb all those other times was that the diaphragm looked stretched out to me and it was really hard to get back in. I was scared to rip it with no parts available (cheaply).
Thanks!
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