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Post by allrukdup on Apr 16, 2009 17:22:29 GMT -5
Bought an 07 with 125 mis that was sitting for 6 mos. The battery was weak and it started but wouldn't run like the carb wasn't getting fuel. Figured the e10 fuel had plugged up the carb and a carb overhaul should get things going, so sold my perfectly running 05 and bought the 07.
Once I got it home, I charged the battery, changed the oil and drained the stale gas. I found out about the on/off key thing to get the bowl filled so tried that before I attacked the carb. It started after a few on/off cylces and idled ok but had bad hesitation and flat spots while accelerating.
Got the carb out, stripped it , sprayed every orifice and passage with cleaner and blew it out with air. Was kind of concerned when I did not see any crud or blockages. And sure enough, it did not run any better after the cleaning. I did the ignition key thing to check the fuel pump output and it did pump out some fuel with every click but did not gush out like a car fuel pump.
Don't think it is the choke because it starts up from cold ok but seems to be either lean or not getting enough fuel. Didn't check the filter yet since the pump squirted but maybe I should. Any ideas?
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Post by chanito on Apr 16, 2009 19:21:29 GMT -5
 Check all the rubber hoses between the air filter and the carb for sign of cracks, also check the little hose connecting the carb to the manifold and finally make sure the manifold bolts are tight ;D
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Post by allrukdup on Apr 18, 2009 14:13:17 GMT -5
After checking all the hoses, filters, sparkplug wire and blowing out carb again, I think I have isolated the problem to either the starting enrichment or low speed jet. I am kind leaning toward the low speed because if it was the starting enrichment, wouldn't it be hard to start when cold? My Ruk starts up but bogs at part throttle until it warms up and even after warming, it hesitates sometimes. Once the RPM's are up, it runs ok, just seems to be a low speed problem. From what I've read, it appears the starting enrichment circuit feeds additional fuel until the motor warms up so problem should end once a set coolant temp is reached?
As for the slow speed jet, I need help from you experienced guys. I am wondering if my slow speed jet is partially plugged? I can see light but I can not feed a thin wire through the jet. The wire is thin enough to enter the jet's "hole" but stops soon after that. I can see light and air passes through but I do not see light clearly and almost seems like there is something in the jet...
I may be way off on that slow jet and will test the starting enrichment components tomorrow.
Any input welcomed...
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Post by allrukdup on Apr 18, 2009 21:42:05 GMT -5
Been reading posts about carb adjustment. I would seem that perhaps I just need to adjust the idle mixture? It would seem that the idle mixture should not help mid-range but I am thinking cars not scooters.... Who is a good source for slow jets? No Honda dealers in this town...
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Post by allrukdup on Apr 20, 2009 14:12:32 GMT -5
Update, the bogging and flat spots have been while the bike was on a stand. Took it on the road over the weekend and it seems that it has bogging and flat spots even at full throttle.
I did adjust the idle screw and it seem so help the part throttle response but it still bogs when you give a small amont of gas sometimes. Opening it up wide it bogs almost everytime and that even happens at 15 mph.
I pulled the carb after it was running and found the bowl had the proper amount of fuel and turning on the ignition gives me 3 or 4squirts of gas. Turning on and off the ignition a few times gives me a decent amount of gas but wondering now if my fuel pump is not pumping when running.
What controls the fuel pump after the ignition is turned on? Maybe it squirts when I turn on the ignition but it doesn't pump enough after the motor is running?
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Post by chanito on Apr 20, 2009 16:14:39 GMT -5
 The fuel pump is controlled by your trusty ECM, and sometimes when you let it run dry it can get damaged, with that said, the ruckus uses so little gas it needs to be running super rich for that to happen (the carb bowl run out of gas so quick), i would blame a partially clog main jet or a non sealing diaphragm
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Post by allrukdup on Apr 21, 2009 17:18:54 GMT -5
Hi Chanito, the diaphragm you are referring to is the big diaphragm that controls the venturi? visually, it looks good but how would I bench test it? As I understand, I need the snorkle attached to the carb so could not look into the carb while revving...
I actually spoke to the dealer who sold the Ruckus originally and he said that they have had to install new fuel pumps due to long term storage after the e10 stated being sold. I aksed him if I could hook up the tank and use gravity to fill the bowl as a test. He said that is what they do so if it runs well after that, it should point to the fuel pump starving...
As for my jets, I am pretty confident that the jets are clear. I've removed the carb and blew clear the jets enough times for me to say that they are clear. From the get go, I've never found any dirt or contamination at all in the bowl...
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Post by chanito on Apr 21, 2009 20:40:27 GMT -5
The e10 can clog the filter and starve the pump, but the pump itself can handle the e10 with no problem
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Post by scooterbill on Apr 21, 2009 22:16:06 GMT -5
Is the "e10" that your talking about regular gas that has 10% ethonal in it?
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Post by allrukdup on Apr 22, 2009 17:11:18 GMT -5
Yup, e10=10% ethanol in gas. When they initially started selling it, major problems for many. It dissolved all the buildups in the fuel system and it all ended up in the carb or injectors. And for our boaters, delaminated fiberglass fuel tanks. I'll double check my fuel filter...thanks Chanito!
I just remembered something. I forgot about the tank vent, if it has one. I once had a riding mower that ran well when you first started it but would starve after a short while. The carb was clean, the fuel filter was clear and fuel was gravity fed. Couldn't figure it out for a bit because it flowed well when I pulled the filter or drained the bowl. The strange part was that when I pulled the filter, the gas would gush out, then stop. Took me a weekend to figure out the tank vent in the cap was plugged and fue would flow until vaccum built up in the tank and then stop. A wire through the vent hole to clear it and everything was back to normal...
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Post by scooterbill on Apr 23, 2009 16:14:21 GMT -5
Thanks! The plugged vent is a good thing to keep in mind. I have a 2hp Honda outboard. It has a vent in the gas cap that you can screw closed when you want to carry it on its side. I have forgotten that before, it runs fine for a little bit then stops. I didn't know about the e10 delaminating fiberglass fuel tanks. I guess it would be a good thing to use gas that does not contain ethanol in my boat motor seeing as my boat is made out of wood and fiberglass and has a 1qt. fuel tank that is easy to over fill.
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Post by allrukdup on May 4, 2009 17:41:46 GMT -5
Update, I installed a clear fuel filter between the fuel pump and carb. Hooked up the furl tank directly to the fuel pump and used gravity to feed the carb. That did not solve the bogging. Hooked the fuel pump back and I can see the ruel pumping into the filter but only a trickle but it is pumping and think I ruled out the fuel pump.
The problem I'm experiencing is that it bogs badly when cold but starts up easily so don't think it is the starter enrichening solenoid. Idles perfectly but will bog as soon as you start opening the throttle. The bogging is less when warmed up but still there. Also, seems like missing some power and misses like it's starving when at full throttle.
I can not believe that it is a blocked jet because I've blown out the passages/jets several times. Could the throttle position sensor or some other control be the problem? And what does the "check valve" that is after the fuel pump do?
Thanks...
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Post by scooterbill on May 5, 2009 17:09:29 GMT -5
The check valve lets fuel flow only in one direction. The fuel filter should be installed between the fuel pump and the gas tank. Is the check valve and fuel filter installed the right way? They are supposed to work in only one direction. I think the jets could still be clogged, because you can still blow air through a jet that is not completely clogged. Try clearing the jets with a wire jet cleaning device.
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Post by allrukdup on May 5, 2009 21:27:54 GMT -5
I had suspected that the main or slow speed jet could possibly be the problem and I am quite sure that the main is good but the slow speed jet was kind of iffy. I shot cleaner and blew the slow speed jet and it does flow BUT when I visually looked through the jet, I could not see light clearly. I could see some light but it seemed to be partially blocked and I wish I could see another jet to compare.
Anyone have a spare stock slow speed jet that they could check for me? Can you see through the jet end to end clearly? Unlike most jets, I can not see through my slow speed jet. And if I probe the jet with a wire thinner than the jet's metering hole, the wire will not go through the jet... Anyone have one that they could look through?
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Post by scooterbill on May 5, 2009 22:44:02 GMT -5
You should be able to see through the jets, both the slow and main. Chanito and DandyDan know a lot more about what your problem is. Do what Chanito said. It seems to be the plugged slow jet or main jet along with the vaccum line or diaphram.
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Post by BeerAday on May 10, 2009 1:16:44 GMT -5
allrukdup have you solved your problem? I am having similar issues ever since I installed a Kijima intake. Is the bike completely stock?
My bike starts with no problems. When taking it out it I can maybe hit 20 mph with no power on it at all.
I am waiting to receive a slow jet that I ordered in the hopes that this will make all the difference.
Please post any findings that you have and I will do the same as soon as I replace my slow Jet.
Thanks
I re-jetted my main jet to first 85 then to 88.
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Post by scooterbill on May 10, 2009 1:50:32 GMT -5
BeerAday check and make sure the intake is installed right. You may have a hose in the wrong place, there needs to be a vaccum hose hooked to the carburator. Also do what Chanito said to do in this post.
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Post by allrukdup on May 12, 2009 0:00:14 GMT -5
Well...the replacement slow jet kind of helped and it runs better but I still am experiencing a bog when cold and a flat spot at part throttle. Also does not seem to have the power it should and sometimes a flat spot when at full throttle too. It starts up instantly when cold so I know the enrichment circuit is working but if I open the throttle a bit, bogs down...if I open it up major bog. Once warmed up it still bogs but much less. Hot or cold it idles perfectly.
I'm gonna pull the carb AGAIN and clean it out for like the 10th time and look over the diphragm and needle again... I'm on the right track but no cigar yet. One thing that I did notice, the idle mixture screw did not seem to really affect the idle speed and ran smooth whether I screwed it in or out...
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Post by scooterbill on May 13, 2009 0:59:20 GMT -5
Allrukdup, Is your scoot stock? The carburators on the ruckus need smooth air flow to the carburator or it messes them up. I think your problem has to do with the hose hooked to the carburator, it is the wrong one. It needs vaccum to the diphragm. Check the diphragm to see if it is sealing right and there are no holes in it. You might want to read the posts that have to do with the scoot having problems and the ones on bogging.
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Post by allrukdup on May 13, 2009 16:32:37 GMT -5
Hi scootbill, yup...stock as can be. I searched on this forum for all the threads about bogging and tried the solutions that were posted. Did not find anyone that had to replace the slow jet but tried everything else.
My air filter and snorkel is intact and did inspect my diaphragm the first time I removed the carb. Planning to strip it again and inspect everything again and blow out all the passages again too. I used to be a car mechanic many years back after HS and my specialty was tune-ups and overhauling carbs so I think I kind of know what I am doing...but this Ruckus sure got me stumped. I had a feeeling that I was gonna have a problem the first time I stripped the carb because there was absolutely no rubbish in the bowl...
I'm gonna concentrate on the diaphragm and needle the next time I strip the carb and I'll post an update if I finally figure this out.
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