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Post by rdhood on Apr 21, 2015 19:50:15 GMT -5
So, I decided to start another scooter project. Yesterday, I purchased one dead 150cc 2008 JMStar scooter and an extra 150cc engine for $200. The guy had about 5 dead scooters as projects, and was selling them off.
On the dead scooter: all the body panels are there, has new tires, has new battery. The guy said that he "the piston had a hole in it, so I rebuilt the top end, but it is blowing oil so the rings haven't seated properly, probably needs new rings". I think he was blowing smoke up my behind, but that really did not matter. Clearly he had done some stuff to it, but I don't think he ever started this thing.
Cosmetically, the thing needs new mirrors. In the engine compartment, it looks like a cyclone hit it. Clearly the emissions have been ripped out and stuff plugged haphazardly. There is no air filter/air box. The tubes to the vacuum petcock are not secured and barely hanging on. There is no lock for the seat, and there is a hole around the where the ignition key is. When I turn the ignition and try to start the engine, I get nothing. No lights, no horn, nostarter click.. nothing.
So, if YOU had a scooter like this, where would you begin?
I am tempted to start with an ignition and new locks. move to put an air filter on there, re-plumb with new fuel and vacuum tubing, and then start working out the electrical problems. Once I achieve any kind of spark, then try to get it started. Maybe put a new top end assembly. What do you think? How would you tackle this dead scooter? Is there any way I can tell if he put a new top end on it? What are the chances that the crank/bearings are bad? Would you pull the engine to work on it? (most panels are off).
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Post by rdhood on Apr 21, 2015 21:06:15 GMT -5
Whoa! news: I started poking around the ignition and it was getting NO voltage. so I traced it back to the battery and..... Someone wired the hot directly to the starter solenoid! There was no power anywhere else. when I short across the solenoid terminals, the starter turns the engine over. So my FIRST order of business will be to re-insert a blade fuse holder for power and see if the ignition/lights/horn actually work. I also did some looking at scrappydog, and it appears to be a "Hunter" type chassis. Yay!
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Post by dmartin95 on Apr 21, 2015 21:31:53 GMT -5
So, if YOU had a scooter like this, where would you begin? What is your plan? Are you trying to make money or build yourself a toy? The first order of business is to do exactly what you're doing and get electricity going... Now, for testing purposes, you can (as you're doing) bypass the kill, ignition etc and jump the starter wire (well, to the solenoid) ... Then, hook it back up, one by one, trying the electric each hook up, when it stops firing, you've found your break... ------------------------- I too just picked up a Hunter style of scooter from CL... Didn't get quite the deal you got... I paid $275.00... But, It had a brand new muffler and the whole top of the engine was a brand new, Taiwan kit (all stock sizes).... Anyways, long story short, I stripped it for parts... It's down to bare frame right now... If you need parts, send me a PM. |
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Post by rdhood on Apr 21, 2015 22:01:25 GMT -5
What is your plan? Are you trying to make money or build yourself a toy? The first order of business is to do exactly what you're doing and get electricity going... Now, for testing purposes, you can (as you're doing) bypass the kill, ignition etc and jump the starter wire (well, to the solenoid) ... Then, hook it back up, one by one, trying the electric each hook up, when it stops firing, you've found your break... ------------------------- I too just picked up a Hunter style of scooter from CL... Didn't get quite the deal you got... I paid $275.00... But, It had a brand new muffler and the whole top of the engine was a brand new, Taiwan kit (all stock sizes).... Anyways, long story short, I stripped it for parts... It's down to bare frame right now... If you need parts, send me a PM. My Plan is to build a scooter so that someone else... my brother, ex wife (we still do stuff together), etc, can get a motorcycle permit and ride with me. We have great mountains, the largest lake in Ga, etc. Three day credit card trips (i.e. hole in the wall hotels along the way) would be a blast. And, I'll let you know about the parts. Maybe the mirrors (what color are yours?) and seat. |
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Post by dmartin95 on Apr 21, 2015 23:12:51 GMT -5
The mirrors on it are just black plastic.... They were not the stock mirror's.. He had one stock mirror in with the stuff that had a blinker built in, but it had a crack in the mirror/glass, I'm assuming that was the original... But the mirrors that came on it fit real funky and almost pointed straight upwards... .. The seat is pretty rough looking... It look like the scoot was left out in the elements for a period of time... It's complete and doesn't have any rips, but it's wearing out on the bottom edge...
The scooter was/is a weird green. Not really Neon, and not Lime, almost in between.... The seat is grey and green.
I can get some pics if ya want.
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Post by rdhood on Apr 22, 2015 7:20:26 GMT -5
Yeah, I was hoping it was blue with the built in lights. Come to think of it, there are two sets of three dangling wires inside that cowling... now I know what they went to (the lighted mirrors). I havent been able to find the lighted mirrors anywhere.
Good news though... I re-fused the wire that runs to the ignition and it all works. I don't know why someone disconnected all of it. time to replumb the fuel/vacuum lines and give it some gas and see what happens...
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Post by dmartin95 on Apr 22, 2015 17:33:05 GMT -5
Yeah, I was hoping it was blue with the built in lights. Come to think of it, there are two sets of three dangling wires inside that cowling... now I know what they went to (the lighted mirrors). I havent been able to find the lighted mirrors anywhere. Good news though... I re-fused the wire that runs to the ignition and it all works. I don't know why someone disconnected all of it. time to replumb the fuel/vacuum lines and give it some gas and see what happens... That's awesome news! Some new fuel, crossed fingers and you'll be golden!  Make sure you put a flashlight in that gas tank and look for rust... The one I picked up from CL had a rusted out tank (only on the inside).... I'm very familiar with this style of scooter and can help you find any brand new parts you need. Here's the blue mirrors (brand new $38.00 for a pair): LINK
 This style of scooter has many names.... The Jonway 150cc Moped (150T-12) The BMS Bemine 150cc The Sunny DongFang The list goes on and on...... |
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Post by rdhood on Apr 22, 2015 20:46:48 GMT -5
Now I'm cooking with gas! I re-plumbed everything (new fuel and vacuum tube everywhere), figured out what every single blocked off tube was, hooked up AGR on the carburator, put in a liter of gas and started it! Just to be sure it wasn't a fluke, I stopped it and started it again... and again... and again! It starts and idles good. Now I have to get an air filter, ordering a UNI from amazon tonite. The old original filter was a huge black box that covered the engine. I couldn't see purchasing one and putting it on.
As soon as all is in place, I can get it up to speed and see whats really wrong with it. The guy said he replaced the piston and the rings didn't seat and its having oil blow-by.
Removing all the emissions on my first scooter really prepped me for hooking this one up sans any emissions. I am optimistic now that I'll be able to get this scoot running for under $300, even if I have to buy a new top end kit.
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Post by dmartin95 on Apr 22, 2015 21:21:21 GMT -5
I am optimistic now that I'll be able to get this scoot running for under $300, even if I have to buy a new top end kit. Now that's something I do have for ya if ya need. The guy I purchased my CL scoot from ran it without the engine shroud and over heated it, killing the top end. So, he bought a complete new top end and realized it would be too hard to put together. I have everything from the cylinder up, brand new with new gaskets, rings, clips etc etc.... Stock size. It's a Taiwan Kit and it's a non emissions cylinder head! If ya need it, let me know, I'll give the best price around..... |
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Post by geh3333 on Apr 23, 2015 0:39:47 GMT -5
If you rebuild the top end , you need to either buy a new cylinder and rings or hone the cylinder before installing the new rings. Once u remove the piston and rings from a cylinder you should always buy new rings and hone the cylinder. You can get a new cylinder for about what it would cost to have a shop hone one.
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Post by phatboy on Apr 23, 2015 11:42:15 GMT -5
My Plan is to build a scooter so that someone else... my brother, ex wife (we still do stuff together), etc, can get a motorcycle permit and ride with me. We have great mountains, the largest lake in Ga, etc. Three day credit card trips (i.e. hole in the wall hotels along the way) would be a blast. I'm doing that too, with the exception of the ex wife... I am pretty sure my current wife would not want me hanging with her I sold my old scoot to my brother for next to nothing and he rides it everywhere. currently working on getting my wife into riding, I bought a 49cc for her to learn on (and me to tinker with). |
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Post by rdhood on Apr 23, 2015 20:33:02 GMT -5
So, I talked with the seller today. This is what he told me: the top end is new. the carburetor is new. He said that it runs, but it blows smoke out of the tail pipe. I have not witnessed this at idle. He believes that the rings did not seat, and that I just need a new set of rings.
I'm listening to all advice on this. What do you think? If it is rings, do I still need to hone the cylinder or get a new one? what else might cause it to smoke after a rebuild?
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Post by geh3333 on Apr 24, 2015 15:00:39 GMT -5
If It were me , I would buy new rings and a new cylinder, actually a new cylinder kit. I wouldn't even mess around with trying new rings without honing. We had a member do this not too long ago and it didn't work out for him . he ended up buying a new kit.
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Post by rdhood on Apr 24, 2015 18:36:41 GMT -5
I hear you. Here is what I am tempted to do: my local auto parts stores all lend out tools... and each has a cylinder hone. I have a vice and a drill press. I am tempted to borrow one, chuck it in the drill press, hone the cylinder and install new rings. If that fails, then I'll go the top-end kit route. The original owner has no reason to lie. And if he is truthful, I hate to toss a top end kit with virtually no miles on it just because he installed it wrong.
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Post by geh3333 on Apr 24, 2015 19:30:17 GMT -5
I hear you. Here is what I am tempted to do: my local auto parts stores all lend out tools... and each has a cylinder hone. I have a vice and a drill press. I am tempted to borrow one, chuck it in the drill press, hone the cylinder and install new rings. If that fails, then I'll go the top-end kit route. The original owner has no reason to lie. And if he is truthful, I hate to toss a top end kit with virtually no miles on it just because he installed it wrong. No harm in trying . |
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