Sophomore Rider
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Posts: 106
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Joined: Sept 11, 2013 23:04:09 GMT -5
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Post by jdmsoldier on Mar 10, 2014 0:04:38 GMT -5
THE PROBLEM:
2-Stroke moped 50cc jonway Small oil leak Oil light and sound was on. Checked oil near gone, but still had a good amount in the tank. After a 2-hour ride, died out while stopped near my house. Made loud screeching/chopping sound when I tried to start Finally started after I kind of forced the gas but sound was loud and could hear it through my helmet. It jerked a couple times, then sounded normal as usual, but died out again after 1 block Won't start or turn, only hear 1 click from the back of the bike when I hit starter
I probably did this to myself with improper maintenance. I like to do everything DYI, to save money, so i borrowed some tools, tried to do oil changes in the beginning, but for the gear oil, one of the bolts was too small, it was like it was in between sizes either that or stripped, so i just tipped the bike and let the oil drain.
As for the two-stroke oil i just kept refilling it. I didnt know where to bleed the old oil, and I been doing that since I got it. A few months ago it started leaking oil, and needed oil more frequently. I knew it was bad, and that I should have found where to bleed it, but I just kept avoiding it.
Local shops charge around 60+ per hour, plus they would need to tow it is prob 30 to tow. Complete tune ups here cost around $200. I figure when the thing is fixed I might as well buy another moped with those prices.
I know its not cool to avoid proper maintenance and then ask for help, but I need to know where to start on DYI repair. Thanks.
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Sophomore Rider
Currently Offline
Posts: 106
Likes: 0
Joined: Sept 11, 2013 23:04:09 GMT -5
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Post by jdmsoldier on Mar 11, 2014 0:09:34 GMT -5
I spent some time taking a part my bike today. It was raining mid way through so i had to stop. I havent tried to start her at all, except for in the morning when i woke up before i started taking the bike apart, and by the end of the day I didn't accomplish much except knowing that the belt wasn't the problem.
I opened up the air filter, and immediately oil starting spilling out. It was brownish color. Took the filter out and it was semi soaked in it. i took the whole thing off and washed it casing and all, although I been having a hard time putting it back on to the pipe it was connected to, spent about 20min trying to do it, but just couldn't get a fit, then it started getting dark so i stopped.
I checked the belt also and it looks fine.I wouldn't think cleaning out the air filter would solve the problem, and I havent put the parts back on yet. I read on another site that oil in the air filter could be a carb problem?
Any suggestions on what else I should start diagnosing, or should I just have it taken to a mechanic?
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Post by skuttadawg on Mar 14, 2014 21:31:01 GMT -5
Do a compression test as it should be 120 PSI or more . If you ran low on oil you may have only soft seized it and it still will run . A bad seize and its rebuild time . It is so easy to rebuild a 2T and a great excuse to get a BBK . I have a Jonway and it got it to where it leaked out my oil too . I unhooked the tank and premix since it is a safer option . My Magnum has the handsome boy body ( like Peace VIPs and others ) so after removing the exhaust I only had to remove the fan shroud to get to the engine instead of removing the body or dropping the engine from the frame . Is is easy to be lean on a 2T so I suggest upjetting a size or two main jet to be safe . Any intake or exhaust leak will make it lean and prone to damage . Here is oil pump adjustment how to oil pump
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