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Post by stevef222 on Apr 22, 2016 20:54:48 GMT -5
Just got this scoot, Taotao Roman 150cc GY6. Starts up cold like a champ. No issues, runs fine. Runs for 5-10 mins and then peters out and dies. Attempt to restart is futile. I have replaced and checked the following… 1. Carburetor: Replaced with new carb, same issue. 2. Valves: Adjusted valve clearances to .004 intake, .005exhaust. 3. Check spark plug. Looks good, No heavy deposits or not too white. *Noticed semi-clear gas filter is only ¼ full. Not sure if only ¼ full gas filter has anything to do with this or not. I “feel” that this is a warm up issues, after warmup / heat issue causing this. Please advise oh great Chinese scooter masters.      |
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Post by tortoise on Apr 22, 2016 21:40:08 GMT -5
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New Rider
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Post by stevef222 on Apr 22, 2016 21:46:06 GMT -5
Forgot to mention... the fuel in filter is where you see blue line. About 1/4 - 1/6 the total fuel filter. And I have to wait for scooter to "cool" down until next day or few days for it to start back up again. Or else I just get the starter trying but no turn over. The gas filter rises slightly then goes down.    |
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Post by rockynv on Apr 22, 2016 21:59:21 GMT -5
What speed range are you running the new scooter at? It needs to be run-in at below 2/3 of max speed (that's about 30/35 on a 150) for 150 to 200 miles or you can get soft seize issues.
Otherwise it sounds like it could be a defective ignition pickup if its not fuel. People are too quick to start tearing apart carbs on new scoots. Even if you have a spark with a defective pickup it can be at the wrong time and when they get hot they peter out just like you were running out of gas. Usually by the time you open things up to check the spark they have cooled enough to work again making it harder to check them and if you run them with the covers off then until they get really bad the extra airflow prevents them from failing.
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Riding something with two wheels and an engine for 40 some years.
Posts: 81
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Post by powerzombie on Apr 23, 2016 5:36:49 GMT -5
Make sure your gas cap is venting.
Re-check the valves, too tight and it will do what you are describing- as the engine starts to make heat, they exhaust valve loses it's clearance and lifts off the seat slightly causing loss of compression.
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Post by gy6er on Apr 23, 2016 14:43:23 GMT -5
Ok.. No super pro,but that,s a nice scoot!! Even I wann see her broke in blazing so.... Just some thoughts New spark plug? Pick up coil loose and when warm-moves out of wack? Maby cdi is dud,especialy after warm up...I may start there and then check pick up. You look like you know about lean/rich conditions,so? Good luck though. Someone help. I would scream into a white jacket. Also, no warranty I take it?  |
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Post by rcq92130 on Apr 23, 2016 15:14:25 GMT -5
They do not ship with a full gas tank. put gas in that puppy
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Post by yelloscoot on Apr 23, 2016 21:51:33 GMT -5
I had the same type of issue when I first bought my Roketa 150 back in 2011. I would get a mile or so down the road and it would just sputter to a stop and then die. I found that if I removed the fuel cap it would start right up. So, to solve that, I just drilled a small 1/8" hole in the cap. Problem solved. Never had another issue with it dying out. Just a thought.  Loren (Now that I think about it, the fuel tank vent hose thingamajig, may have been installed backwards.) |
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Post by gy6er on Apr 23, 2016 22:38:08 GMT -5
Oil/greese/oil/greese....better get down-n dirty! |
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Post by oldchopperguy on Apr 23, 2016 23:29:27 GMT -5
If your gas tank is in the floor, it must have a fuel-pump (which could be acting up). If your tank is up high, with gravity-feed, your vacuum petcock may not be functioning correctly.
I would first try Yelloscoot's trick of running with the gas-cap off, or loose. If that doesn't help, I'd try running a fuel-line directly from the tank to the carb. If that fixes it, replace the vacuum petcock with a manual one.
I had a Chinese 150 for seven years, and fuel-delivery was one of the problems I had. Mine had a gravity-feed, and the vacuum petcock would not stay open. The engine would die at speed. I installed a Briggs & Stratton manual petcock in place of the vacuum unit.
It really does sound like a fuel-delivery issue.
Hope this may help... Nice scoot though!
Ride safe!
Leo in Texas
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Post by JerryScript on Apr 24, 2016 1:51:51 GMT -5
Had cap venting issues as well on my 150cc. With my setup, i can leave the cap loose, but I recommend drilling a 1/8" hole on the cap, less chance of spillage. I haven't had the issue since I started leaving it loose.
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Post by horace on Apr 25, 2016 17:51:42 GMT -5
Fuel filter is fine....
As this is a "new purchase" how about that warranty?
Jokes aside,
Is the battery charged ? How about that spark plug ? Is the Coil securly attatched ? KISS.......
May I ask what mods have been done and why the "naked" look? what happend to the plastics?
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Post by gy6er on Apr 26, 2016 8:06:53 GMT -5
That scoot is sweet,get her going yet? here's my 170cc. It now had mid blue rims though!   |
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Post by cookees on Apr 26, 2016 11:36:25 GMT -5
Definitely a venting problem. We used to disconnect the vent tube from the oneway air valve and zip tie the hose, making sure it was higher than the tank. But then again....it IS a Tao Tao.  |
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Post by gy6er on Apr 26, 2016 12:04:27 GMT -5
 prince geo chimed in and said......ooooo....lllllaaaaayyyyyyyyy (cute geo in robe) would-a? |
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