Coolster atv timming

https://coolster.com/manuals-diagrams/ --------------------- https://www.manualslib.com/products/Coolster-Atv-3150cxc-12101383.html

its interruption is caused by the carburetor, it is not adjusted correctly, or due to the clogged air filter

http://chineseatvmanuals.com/service-and-repair-manuals-50cc-70cc-90cc-110cc-125cc-chinese-atv-service-repair-manuals-p-148.html

I did not see a manual at the Coolster web site, but it reportedly has parts for some models.

https://coolster.com/


50cc 125cc Chinese Atv Repair Manual Set Om 110set Service and Repair...

replace the CDI

your carb is lean. you probably need to clean it and check for air leaks

There should be dot marks on the gears which line up with marks on the case,or you can Google your request,and a video will show you how it's done.

Tim, fault in reverse switch.
Check the attached links,Manuals and guides, Good luck with your Bike
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How to Diagnose Motorcycle Electrical Problems Dennis Kirk Inc
ATV Service and Repair Manuals
Service Manuals for Download in PDF

#1 completely clean and set the carb..make sure air filter is clean.

well if the motor is a 4 stroke then it could be many things, like timming,bent or burnt valve,even a faulty coil.
however if its a two stroke a stuck power valve, or a bent or broken reed valve will result in a back fire.
if its thepower valve you need to clean and lube with the higest tempature syn. grease you can find,Gary

T is usually the mark on the flywheel and there's usually a mark on the cam sprocket and head to line up. you can google up a service manual too most likely.