The bike after charging is going very slow, not full speed! What could be the problem? MX350 Dirt Motorcycle

Question edited for a lot more clarity.
Question moved from 'Power Computers' to model category.

Did you just remove the lead acid AGM batteries and replace with Lithium Ion? There is a lot more to it that that, you have to replace the controller as well and for safety you need a LiFePO battery and a new twistgrip because the old one is little more than an On / Off switch..

Motor Controller Kit
24v LiFePO4 Battery
Lights and Horn Kit https://www.ebay.com/itm/222627137235

I think you can a new dirt bike charger easily on Amazon or on the razor website. Be aware of how you use the battery though, it is the same idea for a lot of mobility equipment (electric scooters, electric wheelchairs, electric bikes, and etc...). You need to use the battery PROPERLY. For example, charge them from time to time, don't leave them there for a long period of time just because you don't need to ride out your electric dirt bike. Your battery's longevity will get hurt. Also, protect it from water and dust. I learn a lot more about outdoor sports equipment on this site: https://mobilityseeker.com/.

Have you tried removing plastic chain guard and making sure chain is not off track i had this problem and that is all it was.

MX350 is a 24V bike.
You could change the gearing by replacing the sprockets, or you could replace the electric controller and upgrade to 36V, but you probably would be better off getting a bigger model, like the MX500, as this uses 36V already and the higher voltage allows for higher motor rpm.

Sounds like the batteries are low in capacity and need replacing. The batteries do not last well if left sitting (hardly used).

yes!your battery needs replacement.....throttle clicking after a full charge is a sign,...but that's after 2years or more,depending on how it's being used..your motor can go bad before then if you been riding in the rain--wet connectors in or out the motor can not get wet for any reason..a full dirt motor bike can not get full dirty with mud..mud catains water/water and electricity don't mix/////.motor/thottle/moisture.

How do I charge a Razer zr350 dirt bike without a charger

have a read of the trouble shooting guide here
http://www.razorama.com/razor-installation-guides.html

hi mate seasoned biker here you need to charge your battery by trickle charging for about 16 hours at a rate of about 1 to 2 ampers the battery should be disconected and removed from the bike first /the manufacturer never tells anyone and its so important

The battery went bad inside the bike. I would take it out and go to batterys plus and they will help you pick out a new one