I have a Jato 110cc ATV with a vibration when it gets up to high speeds. It's also leaking oil from the crank case.

'Sam' isn't the manufacturer. If you by 1,000 in bulk from a Chinese maker they will call them 'Corrine' if you want with badges and decals to match.

Try the Baja manual (seller probably lives in California and chose the name).

https://www.google.com/search?q=%22sam%22+110cc+quad+manual

..

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...

Most likely the head gasket is leaking. As to parts we do not have parts here or anyway to look them up for you.

Need to look at more vid

NO--- If you clean the case spotless of oil, 5 minute two part Epoxy will seal it. Let it set over night.

Sounds like two diffrent problems ,but the leaking of the coolent could be radiator ,bad hose or thermostat .If the oil is leaking it might have a sensor so you dont blow the motor ..I hope this helps ..If any thing please call local Polaris dealer so no futher damage ..Have a great xmas !

what color is it turning? if its glowing red your carb is running lean.

sounds like you need to adjust the idle. it trying to move when the revs are high is what its supposed to do.

sounds like your rings are worn out.

yes - all gas motors need oil in the crank case - it should say on the engine either ( cc or ll ) for the amount of oil to put in - 20-40 oil type.