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Post by thxcuz on Sept 12, 2016 11:00:00 GMT -5
I JUST finished buttoning up the scooter for hopefully the last time for a while. I was riding it jauntily through the neighborhood and heard a pop or a thud or some sound that sounded like a sound I wouldn't like to hear. The sound of sudden sadness. I thought maybe I broke a belt... nope it was fine. I'm afraid I'll have to take it apart again and I'm almost positive I won't like what I see. When I try to start it I hear things moving but not the usual thump thump of a piston moving. I won't know until I take it apart YET AGAIN!
My fear is that my crank broke.
That $100 Spare parts scooter doesn't seem like such a bad idea now.
Anyone want to buy a broken tao tao?
Who am i kidding... nobody does.
I got my bicycle out and rode that.
My good old Schwinn never let me down.
Sorry. Had to vent
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Post by acvw74 on Sept 12, 2016 11:43:56 GMT -5
Sorry to hear this!
You can check the crank without taking it apart...look to see if the fan is turning while you try to start. It doesn't rule out a broken rod...but a place to start.
I wish you luck!
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Post by humanshield on Sept 12, 2016 12:13:53 GMT -5
Look at it this way....every time you take it apart you will get better and better at it.
Kinda odd you would break a crank. Lots of people with BBK's ride them hard and don't break cranks.
Could be something in the valve train. I wonder if you got the piston pin clips in properly?
Then again, sometimes it's cheaper to pay someone with experience to do it after all is said and done.
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Post by tortoise2 on Sept 12, 2016 12:42:44 GMT -5
Have to wonder . . if you would have saved yourself a LOT of aggravation by initially selecting a 150cc TaoTao, made NO modifications, and just performed routine maintenance? The Yamaha Zuma 125's have completed several cross-country rides with very few issues. |
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Post by 90GTVert on Sept 12, 2016 12:47:44 GMT -5
Hopefully it won't be nearly as bad as you're expecting. Go over the basics (fuel, air, spark, compression) before you take too much apart.
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Post by thxcuz on Sept 12, 2016 13:15:45 GMT -5
I checked the valves, they are ok. Could very well be a circlip. I find those the be the hardest thing to work with. I ran my old Puch Maxi with one clip for a short time because I had so much trouble getting it in. I put it back in not long after.
I miss that puch. I should have kept it
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Post by thxcuz on Sept 12, 2016 13:22:01 GMT -5
Have to wonder . . if you would have saved yourself a LOT of aggravation by initially selecting a 150cc TaoTao, made NO modifications, and just performed routine maintenance? The Yamaha Zuma 125's have completed several cross-country rides with very few issues. I have no doubt that I would. I came across this whole scooter thing by accident. I had a moped. Then got into those 66cc engines you bolt on a bicycle. It ran great but it was kinda dangerous. I put an ad on cl looking to trade it for another moped. This guy had 2 scooters a Tao tao that "just needed a new cdi" Or a kymco that "just needed a piston" I chose the tao because I thought it would be easier. If I were to do it over again I would have gone with 150 in a heartbeat. Or just get another Puch |
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Post by thxcuz on Sept 12, 2016 13:59:18 GMT -5
Fan spins, valves are set properly but my finger test gives me no compression
No compression = much depression
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Post by humanshield on Sept 12, 2016 16:51:35 GMT -5
Piston wrist pin clip came out...chewed up the rings and piston  WAG |
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Deleted Member
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Post by Deleted on Sept 12, 2016 17:16:45 GMT -5
Drain the oil, look for anything that should not be in there...metal pieces and chunks would be an example. Cost you a quart of oil, and 5 minutes, to find out if something really bad happened in there.
I hope it is not bad.
Bill
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Post by thxcuz on Sept 12, 2016 17:46:47 GMT -5
Piston wrist pin clip came out...chewed up the rings and piston WAG I'm almost positive that's what happened. But I've been wrong before. Fortunately I have a spare piston and cylinder. I'd also like to remove the engine this time just so I know how to do it. Plus these engines are a bit of a knuckle buster. I guess I'm not chucking it in the river after all |
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Post by humanshield on Sept 12, 2016 17:56:49 GMT -5
It's worth the trouble. When you finally get them running just right....it's awesome fun  |
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Post by ThomasTPFL on Sept 12, 2016 19:24:34 GMT -5
Have to wonder . . if you would have saved yourself a LOT of aggravation by initially selecting a 150cc TaoTao, made NO modifications, and just performed routine maintenance? The Yamaha Zuma 125's have completed several cross-country rides with very few issues. Ahhh.... But having a 50mph 50cc is special, takes work and knowledge. Or money to buy an SR50. |
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Post by thxcuz on Sept 12, 2016 20:53:55 GMT -5
Have to wonder . . if you would have saved yourself a LOT of aggravation by initially selecting a 150cc TaoTao, made NO modifications, and just performed routine maintenance? The Yamaha Zuma 125's have completed several cross-country rides with very few issues. Ahhh.... But having a 50mph 50cc is special, takes work and knowledge. Or money to buy an SR50. 50mph on a 50cc 4 stroke? What kind of sorcery are you speaking of, kind sir? One should not dabble in the dark arts |
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Post by jstich on Sept 12, 2016 21:37:38 GMT -5
50 mph on a 49cc 4T not that strange. I've hit 50 indicated on mine a few times with only an iridium plug and needle adjustment.
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