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Post by lykolate on Jul 15, 2014 15:52:53 GMT -5
I have now taken off the vacuum petcock and have installed the manual petcock again. I have also taken the float from the old carburetor and placed in the new carburetor and that height looks much better to me. However, I did not get the chance to test it today because it started to rain when I was going to charge the battery so that I could test it out. The battery was dead because I flooded the engine when I was trying to start it earlier on in the day. What would make or cause the engine to keep on getting flooded when it hasn't even started yet? I have the stock pilot jet and the stock needle in it from the stock carburetor.
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Post by craisin on Jul 16, 2014 2:05:28 GMT -5
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Post by lykolate on Jul 16, 2014 15:39:45 GMT -5
youtu.be/IEx_Ly7uHyYHere is where I stand now. Can start easily but no power, bogs down and backfiring.
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Post by stevec on Jul 16, 2014 18:57:01 GMT -5
when my engine did that i replaced the diaphragm and it fixed it. yours is acting up at half throttle and that is where the needle takes over.
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Post by craisin on Jul 16, 2014 20:54:50 GMT -5
when my engine did that i replaced the diaphragm and it fixed it. yours is acting up at half throttle and that is where the needle takes over. you could say this and you could say that but ideally you want the needle in the centre notch as the needle is the easiest thing to change and it leaves you scope for quick changes. I think if he has the smaller jet in its too small I find the diaphram gets wet with gas and swells up and wont go back in the groove till it dries. I leave it in the sun to dry and thing fall into place. My scoot starts in the morning no throttle cause if i flood it its a bitch i there are better things for me to do than waiting for the plug to dry out. When i first bought my bike the told me no throttle in the morning or you got a long wait
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Post by stevec on Jul 17, 2014 4:06:36 GMT -5
not the needle position, the diaphragm itself might not have a good seal under the cap. it is idling fine and going to half throttle no problem which means his pilot jet is not the issue, he can't get to 3/4 throttle where the main jet takes over which tells me it is the diaphragm. check to make sure the diaphragm is sealing properly and is not loose otherwise when the plunger moves up it will lift the rubber up on edges causing a leak.
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Post by craisin on Jul 17, 2014 4:33:58 GMT -5
not the needle position, the diaphragm itself might not have a good seal under the cap. it is idling fine and going to half throttle no problem which means his pilot jet is not the issue, he can't get to 3/4 throttle where the main jet takes over which tells me it is the diaphragm. check to make sure the diaphragm is sealing properly and is not loose otherwise when the plunger moves up it will lift the rubber up on edges causing a leak. i guess i will go back to minding my own business you dont make sense and i have better things to do
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Post by stevec on Jul 17, 2014 9:49:12 GMT -5
i'm not going to answer to this kind of response, i have fixed enough scooters to know what i hear and what i do to repair it. keep your comments to yourself unless you have something to offer.
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Post by lykolate on Jul 17, 2014 13:43:45 GMT -5
So beyond you guys making me feel like daddy hit mommy ...I had a breakthrough. I replaced the vacuum line that goes from the intake manifold to the thing on the right side of the scooter in the rear behind the throttle cable area. I think I put a bad line here and it was collapsing on itself. This has gotten me about 80% power back and while its not really bogging down...it is missing about 10mph top end speed and that powerful takeoff feeling with WOT. Rerun on what is the current hook-up...Stock Jets 79/32...(82/32 & 84/34 made it bog down and run like crap, even after this vacuum line change)...Air Snorkel Restriction is off...(this change made little to no difference). Manual petcock is back installed, Replacement diaphragm and needle are being used with better outcome than the stock diaphragm and needle (inside replacement carb.). The needle's C clamp is at the top most rung or circle which is an improvement over anything lower on the needle. Maybe I have improperly sized vacuum hoses all over? I just don't know what else to change at this point I guess.
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Post by lykolate on Jul 17, 2014 15:17:31 GMT -5
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Post by 2TDave on Jul 17, 2014 16:36:30 GMT -5
Damn that's rich! I'm not getting why with the stock jets. I was going to warn you against running with the needle all the way lean but I see why you are. It doesn't make sense though. Your sure the float is where it needs to be? I might be inclined to close it a bit. Just throwing ideas out.
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Post by lykolate on Jul 17, 2014 16:51:37 GMT -5
I think I might know the issue...could it be that my fuel line is 1/4in instead of 3/16in??
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Post by 2TDave on Jul 17, 2014 17:52:13 GMT -5
No I don't think so. If the float is working it will shut off fuel regardless.
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Post by stevec on Jul 17, 2014 19:26:52 GMT -5
sorry about that, didn't meant to overreact but i don't like being insulted in the threads when i am only trying to help. i have had experience with scoots running like the video shows and most cases it is not a good seal on the diaphragm, i have seen new carbs come through with bad diaphragm especially the chinese ones. does the engine stall when you turn the AF in all the way? if the setup is correct it should stall if you turn the screw in all of the way. i can't think of why it would be running so rich with stock jets unless the float is set wrong. collapsing fuel line would make it run that way too, i have never seen a fuel line collapse, i have seen them fall apart though.
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