2 stroke engine not starting

it is inside eng trace wires from battery back to eng timing will jump if u dont stop it from turning remove spark plug and put something inside cylinder like a piece of rope to keep piston from moving must be on up stroke when doing this must not move piston at all. be careful good luck

being a 50cc engine it should have only 1 piston
If it is a 2 stroke , it will fire every time the piston comes to tdc
if it is a 4 stroke it has to have a timing point that excites the ignition system for every 4th stroke tdc
if the exciter receives a signal to fire the plug at the wrong time , it is getting that signal from a fault or incorrect timing
that fault can be
loose wire/s,worn unit that controls the timing ( distributor fault), loose flywheel , flywheel touching coil,incorrect timing (180 degrees out ) stator loose ,rotor loose,faulty crank position sensor
it is good practice to have a workshop manual on hand and if you don't have one go google and type in --workshop manual for 50 cc tao scooter--and see if there is a pdf version in english to download

My scooter has no spark how to fix. gy6 chinese ... - YouTube

? 2:29
https://www.youtube.com/watch?v=UU4S0Ov9q4c
Aug 24, 2012 - Uploaded by Rolling Wrench
Purchase our "NO SPARK KIT" click the link below: ... My scooter has no spark how to fix. gy6 chinese scooter 139qmb qmb13950cc 150cc.

Author Topic: people 50 2 stroke no spark CDI?? - KymcoForum.com

www.kymcoforum.com > Scooters - 50cc > People 50
Aug 5, 2012 - 7 posts - ‎4 authors I have a 2001 people 50 2 stroke that only has 125 original miles. ... I ordered a CDI and coil from monster parts and it still would not start . Author Topic: (Almost) no spark / engine not ...
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Did you check the timing? If the timing is off there will be a reduction in performance and power will be greatly reduced. If the engine is "pinging" or "knocking" under heavy acceleration, your timing is advanced, and pre ignition is occurring (that's when the spark has ignited the fuel in the combustion chamber prematurely), resulting in a knocking sound. When the piston is compressing the air/fuel mixture within the combustion chamber, the spark plug produces a spark from current it receives from contacts closing in the distributor cap. (Where all the spark plug wires are plugged into) if that spark come BEFORE the piston finishes it up stroke or compression stroke, the piston is then being slowed down from the kinetic energy produced by the exploding fuel. Thats where we loose our power. Idealy, the spark should come AFTER the piston has rotated over the top of its stroke, It has reached its limit in compression and is on its way back down then the spark should ignite the compressed fuel, thus giving the piston an additional "shove" back down to start its "Power" stroke, once its reached the bottom of the power stroke (stroke #2 of 4) it is then carried back up for the "exhaust" stroke pushing the burnt fuel out of the combustion camber and into the exhaust manifold, one it has reached the top of that stroke it begins its journey back down to start stroke number 4, the Intake stroke. Drawing in air/fuel mixture to again be pushed back upward to compress the air/fuel, and repeat the process over and over again. Now that I have thoroughly bored you to tears, Yeah, check the engine timing, if its not the timing it may be a vacuum leak.

TAKE SEAT OUT FIRST THEN JUST REMOVE FROM THERE AND COIL BACK IS A LIL BLACK BOX ON FRAME

do a compression check if its under 100 psi could be piston rings are bad or leaking gaskets.

I would recommend that you check the main fuses located somewhere near or behind the sidecovers on either side of the motorcycle, If that is unsuccessful...You know, fuses are okay looking, then at that point check the electrolytic acid level in the battery. (usually located under the seat or behind the sidecovers as well). If the battery acid level is too low the engine will not run properly and if it is super low you will not even have enough energy to create a spark.

Good Luck my friend,

Phillip

i have a 49.50cc beron motorscooter and when i received the scooter it had spark but now there is not any spark bought new sparkplug and new coil still no spark

I suggest you bring the pistons to TDC, one at time on the comprssion stroke and do a "cylinder leakage test". Put compressed air into the spark plug hose and try to detect where the air is going. If you have the piston exactly at TDC, it will stay there when you put conpressed air in the hole, if it's off a little it will push the piston down. If you have the valve cover off you can watch the valves to determine if you have the pistons on the compression stroke. You should be able to buy a fitting from an auto parts store that will thread into the spark plug hole. If not take an old spark plug and bust the guts out of it and weld a pipe fitting to it to adapt your air compressor hose.