New Scooter Problems: Any Ideas? - Kawasaki KLR 650 Forum
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post #1 of 20 Old 09-18-2011, 04:38 PM Thread Starter
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New Scooter Problems: Any Ideas?

Okay, I know this is a KLR650 forum but I think this might be a simple problem I just can't figure out.

Picked up a used BMS 49cc scooter today for the wife to ride. I got it from a guy I work with.

When we went to get it, it fired right up. We brought it home, started it a couple of times and rode it up and down the street a few times. Then, it was just sitting there idling and died.

The fuel filter and lines were easy to get to, so I disconnected the line from the tank at the filter and no gas came out. I blew into the line back into the tank and heard it gurgle then gas came shooting out. I also disconnected the line past the fuel filter and gas spewed out so I know it's not clogged. It was running on the old gas before, but I went ahead and topped it off with fresh gas and some Seafoam.

Problem solved, I figured. It still spun, but wouldn't catch. Went back after awhile and checked the gas line again and again, no gas was coming out, so I blew through it up into the tank again and got the gas flowing again.

I figure if the lines were full of fuel, the thing would at least run until they ran dry again if debris was clogging the tank outlet. But maybe if something settled back over the tank outlet, even the gas that was in the lines wouldn't flow on down to the carb because of a "vacuum lock," per se. I can get a good flow through the lines and hook them all back up and try to start it, but if I go back a minute later and disconnect the fuel line, nothing comes out again.

Just for the hell of it, I also disconnected the air inlet to the carb and sprayed some starter fluid into the system. I thought the thing would at least fire off for a few seconds, but it didn't even try to start.

Now I'm even more confused because I figured even if no gas was getting to the carb, the starter fluid would have at least gotten the thing to run for a second or two. The guy I got it from said it had never done this before and I believe him.

I pulled the wire off the spark plug and looked at the connector and it looks okay. I haven't taken the spark plug out yet because it looks like a real b***h to do so, but after the try with the starter fluid, I'm thinking maybe it's not getting any spark.

I'd appreciate any ideas anybody has. At this point, I'm thinking there's debris in the tank that's blocking the fuel flow and perhaps the engine's flooded and that's why the starter fluid didn't do anything. I find it hard to believe it would be a simultaneous fuel flow/spark plug problem. Probably the only way to get the crap out of the tank is to remove it from the scooter.




Last edited by planalp; 09-18-2011 at 04:41 PM.
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post #2 of 20 Old 09-18-2011, 05:01 PM Thread Starter
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On second thought, I can't see the petcock or valve on the bottom of the tank, but there appear to be two lines going up there. So, I'm guessing it's most likely a vacuum system, so even if I do disconnect the fuel lines, it's not going to come gushing out. It does right after I blow into them, but not if I don't. Perhaps it is a spark problem.



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post #3 of 20 Old 09-18-2011, 05:19 PM
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BMS, is that a chinese scooter? If it is the CDI units on them are pretty notorious for just up and dying. Also if it's chinese and has the original plug they often use some pretty cheap spark plugs that will die without warning.

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post #4 of 20 Old 09-18-2011, 05:24 PM Thread Starter
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Yes, it's a Chinese scooter. I'm guessing my best bet is to put a new spark plug in it tomorrow and see what happens. Not looking forward to that because it's in a really tough spot to get tools in.

Must admit, it was pretty fun to zip around on, even with my 280 pounds. And, after watching my wife try to ride it, I am SO glad we didn't get her a small motorcycle.



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post #5 of 20 Old 09-18-2011, 05:29 PM
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Quote:
Originally Posted by planalp View Post
Yes, it's a Chinese scooter. I'm guessing my best bet is to put a new spark plug in it tomorrow and see what happens. Not looking forward to that because it's in a really tough spot to get tools in.

Must admit, it was pretty fun to zip around on, even with my 280 pounds. And, after watching my wife try to ride it, I am SO glad we didn't get her a small motorcycle.
Actually some of those chinese machines are a dynamite value for the money. Hopefully the plug straightens it out for you but if you need any troubleshooting help on it, another good place to check out is chinariders.net. It's a website that is geared towards all types of chinese motorcycles, scooters, and ATV's. Has a friendly bunch of folks on it that know their chinese bikes inside out. I'm a mod over there

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post #6 of 20 Old 09-18-2011, 05:32 PM Thread Starter
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Quote:
Originally Posted by 650Stew View Post
Actually some of those chinese machines are a dynamite value for the money. Hopefully the plug straightens it out for you but if you need any troubleshooting help on it, another good place to check out is chinariders.net. It's a website that is geared towards all types of chinese motorcycles, scooters, and ATV's. Has a friendly bunch of folks on it that know their chinese bikes inside out. I'm a mod over there
Cool. Thanks for the heads-up on the Chinese forum. If I don't need them to figure out this problem, I'll most likely need them in the future.

The owner's manual leaves a lot to be desired. It doesn't even specify what weight of oil to use in the engine, nor does the placard on the scooter itself.

It does refer to it as a "50-Quart Motorcycle" which I think is hilarious.



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post #7 of 20 Old 09-18-2011, 05:37 PM
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Lol, some of the documentation and stickers on them is hilarious. I don't think they bother with an english proofreader. My ATV has a sticker on the transmission saying "Shifting will be prohibited unless accelerator is loosed". Chinariders is a great site, nobody flames you for having a chinese bike there and we have a few scooter afficianados there as well.

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post #8 of 20 Old 09-18-2011, 06:22 PM Thread Starter
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Well, I had a few Milwaukees Best Lights to steel my temperament and prevent any profanity-laced tirades and had a go at the spark plug. Fortunately, the tool kit that came with the thing had a cheap, stamped-out bare bones spark plug wrench that made getting in there much easier than using real tools. Had to work by feel, but got it out.

It had no fire.

So, hope it's the spark plug instead of the CDI box and hope they have an equivalent (Torch A7RTC) at the local gas station.



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post #9 of 20 Old 09-18-2011, 06:28 PM
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Torch was the name of the original plug? That does sound Chinese! Not sure what the gas station has there but they seem to prefer NGK's if you can find it's equivalent to the Torch.

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post #10 of 20 Old 09-18-2011, 06:35 PM Thread Starter
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Yes, I would say it was the original plug. There are NGK and Autolite matches but don't know if the local station will have one. Hopefully an auto parts store in the nearby bigger town will if they don't.



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