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Post by tortoise on Aug 8, 2017 0:20:40 GMT -5
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Post by tortoise on Jul 31, 2017 21:52:41 GMT -5
torn apart whole carb multiple times cleaned all jets and all passages Verify carb needle seat is installed properly.
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Post by tortoise on Jul 31, 2017 21:36:30 GMT -5
Xingyue XY150t-7 . . want to check the CDI, but I can't seem to locate it Potential clue . . .
"Can't find the CDI unit? It's right behind the headlight" . . source
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Post by tortoise on Jul 11, 2017 14:36:45 GMT -5
MC-12-150 . . possibly the piston rings/valve seals are shot Speculating a GY6-B engine . . cylinder stud spacing is different from typical GY6 engine.
Concur there may be a piston ring blow-by issue.
Might also verify that a deficient vacuum fuel petcock diaphragm is not allowing fuel to bypass the carb.
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The fall
by: tortoise - Jul 5, 2017 14:42:51 GMT -5
Post by tortoise on Jul 5, 2017 14:42:51 GMT -5
Qingqi 125 10-D per previous posting . . so probably a typical GY6 engine.
Engine oil MAY have drained out of the valve cover vent port . . and soaked the inlet air filter, if connected to that housing.
Trying to diagnose a deficiency telepathically is pretty much an exercise in futility . . how about a little more initiative on your part!
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Post by tortoise on Jun 29, 2017 8:19:40 GMT -5
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Post by tortoise on Jun 17, 2017 11:10:37 GMT -5
according to the place selling it the engine has a ceramic coated cylinder and is built by SYM in Taiwan Specs do state "Ceramic Coating Cylinder Technology" . . "built by SYM" is suspect!
150cc engine visual comparisons (LANCE is built by SYM). . .
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Post by tortoise on Jun 13, 2017 12:56:06 GMT -5
Super Hornet 150cc . . Compression Ratio 9.20:1 . . low-octane gas should be sufficient. High-octane gas is actually diluted (slightly less energy) to delay ignition in high compression engines. |
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Post by tortoise on Jun 13, 2017 9:52:47 GMT -5
Motobravo Super Hornet 150cc . . 4 occasions it has stalled out . . All 4 times, I was at or near full throttle for several moments Check pulse pump fuel flow . . wide-open-throttle = reduced vacuum pulses = less fuel flow.
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Post by tortoise on Jun 11, 2017 20:36:53 GMT -5
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Post by tortoise on Jun 8, 2017 8:39:30 GMT -5
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Post by tortoise on Jun 6, 2017 18:31:25 GMT -5
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Post by tortoise on Jun 6, 2017 17:28:58 GMT -5
Might research a lawnmower-style "stepped prism" design. |
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Post by tortoise on Jun 6, 2017 16:21:09 GMT -5
This YouTube poster experienced the same GY6 issue . . at 23:07. |
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Post by tortoise on Jun 6, 2017 9:53:45 GMT -5
Have you tried removing the ground pin from the CDI connector . . to rule out a deficiency in the switch circuits? Should engine start . . stop by disconnecting trigger/pickup coil bullet connector.
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