Grandson got a couple China made ATVs

[GranpaMichanic 0]

Grandson got a couple China made ATVs, lucky me, been a while since my motorcycle days, but I’ve mechanic and body worked all my life. Got an issue with the 110 cc one that’s got me scratching my bald head. Replaced carb, adjusted and checked all I see that can be done and it still Boggs out in forward gear , but will spin the tires in reverse and not bogg at all. What am I missing hear ? Anybody got any ideas on what to try next? Please let me know, I’m sure that the best thing to do would be to get rid of the the things and buy a real Atv, unfortunately the grandkids can’t afford it and Grandpa is supposed to be able to fix anything don’t acknowledge. Help needed!

[Ajmboy 508]

Well let’s see if we can help here. 😁

When you say it bogs down is it slipping or is the engine dying out? Almost sounds to me like going forward it’s not geared low enough. Is it automatic or semi/auto/shift? Is there a drive belt?

FYI ... I moved your status post into the forum as a new topic so more would see it.

[GranpaMichanic 0]

It’s a belt drive variable auto clutch type, but it revs quickly in neutral and seems good in reverse, but when you are in forward gear it just seems to bogg and lag , you can slowly get the speed up to what seems to be about half and then Boggs out after that and if you stay on the throttle after it starts bogging it will quit running 

[davefrombc 358]

It sounds to me that it is starving for fuel  under load. That could be from plugged jets, too low a float setting or a restriction in the fuel  line.

 

[JacobSlabach 124]

i had a 110cc chinese 4w and it had a limiter in the ecu where if i gave it full throttle in the forward gear it would bog and die, i think youre running into the same issue.. they are very annoying because it keeps the atv from popping wheelies but also keeps it from having max power for hills and whatnot.

youre also probably experiencing bogging from the carburetor like @davefrombc said, these chinese atv's weak point is the carburetor and theyre very hard to tune just right so that itll actually run strong