Clinician
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Posts: 18 
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Joined: Feb 13, 2014 18:02:44 GMT -6
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Post by briankeith79 on Feb 13, 2014 19:41:31 GMT -6
Not sure on the coil, I did the Ohm test on the 50cc manual I found for 139QMB motors, coil seems to be ok. the coil is standard that came with bike, the CDI was replaced last year with those Orange high performance ones. Im not sure if that would make a difference from using a stock cdi to a high performance cdi besides reaction times I would think. Would electrical be an issue from not allowing it too throttle up too a higher RPM ? but allowing it too Idle at least?? And this is all still with the Airbox not attatched, because when I attach it, it wont even start then at all  |
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Clinician
Currently Offline
Posts: 18
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Joined: Feb 13, 2014 18:02:44 GMT -6
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Post by briankeith79 on Feb 13, 2014 19:33:36 GMT -6
Airbox was cleaned out from dust and debree, the filter looked clean, even used soap and water to clean the sponge, allowed it too dry, it never started up with the airbox connected still. Spark plug is brand new, recently purchased. Fuel filter is also brand new, its a clear model, you can look into the fuel filter and see the filter metal still clean looking. Most of the hoses are replaced with new fuel line hoses, the green clear ones from a motorcycle shop. The carb is still clean, checked it out before. the main jet and idle jet is still clear. The petcock under the fuel tank flows when I suck on the hose to allow it too open.
Any other ideas guys??
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Clinician
Currently Offline
Posts: 18
Likes: 0
Joined: Feb 13, 2014 18:02:44 GMT -6
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Post by briankeith79 on Feb 13, 2014 18:14:03 GMT -6
I got a problem for ya biker guys, I bought a moped in 2008 and its been good ever since. In the past year or so, Its just been sitting while Ive been trying to diagnose the problem and Im stuck as hell.
The moped will start up and idle fine, at times, but it will not accelorate without dieing in the process. At first I thought it was the carborator, so I purchased a brand new one from Partsforscooters.com and put it in. It still does the same thing, Starts and idle's but will not throttle to higher speed without dieing. I read about checking the valve lashes. so I popped the valve cover, head gasket off and check the clearances. I saw they were tighter than should be, about .001-.002 . I adjusted them too a .004, pieced it all back together and put valve cover back on. Still same issue. During all this process, If I had a air cleaner or air filter on it, it will not start at all to even idle, just sits there and cranks over with no stable running. So I took the air cleaner, air filter off. Right now, it will sit there and idle but not throttle with NO air cleaner on the carborator. Seems like putting an Air cleaner or filter on it only chokes it out even worse, it wont even idle then, it will idle without the air filter no problem.
Any one else have an idea of what could cause it too not throttle up, besides even start with an air filter on it? It use to run fine but now, im at a loss. I plan on buying a new moped anyways soon as I get my tax return here in a few weeks anyways, already picked one out, but in the mean time, I would like to fix this problem and have two mopeds, so I can teach my wife and son how to ride one safely without having to worry about wrecking my new one when I get it. Im not letting noobs ride the new moped when it comes... lol haha ya right.
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