Common Problem! Won't go forward like something is jammed! T-Rex 125cc fully automatic with reverse. Same motor as ATK125.

[TheShaww]

I have some very sad kids.

I'll try to make this as clear as possible in one post.

The cart runs amazing! It revs like a monster in Neutral. It drives well in reverse... When I put it in FORWARD, it's like the motor is jammed up. It's like you plop the motor right in the mud. When you press the pedal, it sort of boggs and won't move much. It goes forward, but you have to help push it. It's like the clutch is jammed up. It kinda goes on flat pavement, but won't do anything up a hill of any kind or in tall grass. It's like the clutch is grabbing and many people have told me it's the clutch.

I CHANGED THE CLUTCH 2 TIMES. I soaked the plates. I watched tons of youtube. It can't be just the clutch.

When I shift, it seems easy enough. It shifts fine.

I've seen A TON OF REPORTS online everywhere that people have the same problem. This is not a new problem. I've seen several videos on Youtube that have the exact same problem. Things I've read online are exactly my scenario as well. People get this cart home, drive it for a day, and then it stops and won't go forward. They ALL say the SAME thing that it goes in reverse, but won't go forward.

Please if you have any info, please help me out. My son is so sad that we've never been able to get it going.

 

[Hellion]

I know you may not think photos are worth it and that your explanation is sufficient, but in this community there's tons of people that have knowledge of how things work but don't know the specifics or what vehicle or engine they have for example. T-Rex 125cc? What is that? A photo makes a stark statement.

 

[TheShaww]

I know you may not think photos are worth it and that your explanation is sufficient, but in this community there's tons of people that have knowledge of how things work but don't know the specifics or what vehicle or engine they have for example. T-Rex 125cc? What is that? A photo makes a stark statement.

Ok. I just figured those that knew the issue would comment and those that wanted to help would google it. I'm sorry. I'll add a pic or 2

 

[Whitetrashrocker]

Bear with us here. We have a good team here that can help. These newer china karts have flooded the market.

My guess is that something is wrong in the FnR box. You say the engine runs just fine in N and R. What changes? The Forard. Thats where I'd start looking.

Im not sure on that clutch. You say the internet says to oil the plates. Is that a wet clutch or a dry clutch. When you take off that cover is there fluid in there normally?

Glad you added some pics of what YOU have. This way we can see Your issues. Not some pics on the web.
If you could post the links to the articles your reading I'd love to read them. Maybe I'll catch on to the issue and can help you sort yours.

 

[Master Hack]

In reading this and the other one, i believe there is a communication problem due to terminology. So:
Frozen up usually refers to a mechanical device that is supposed to move but does not regardless of applied force. Applies to sub assemblies such as crankshafts, engines alternators anything that should move but doesn't. (Does not apply to whole vehicles)

bogs generally refers to an engine that runs normal, but stumbles when throttle is opened then returning to normal operation.

It's like you plop the motor right in the mud.
nobody here knows what that is.

sounds like a monster, needs a new muffler?

When I shift, it seems easy enough. It shifts fine but pulling backwards puts it in drive. I believe that is correct, but not 100% sure. Pulling backwards on what?

motor is jammed up, usually meansit won't turn over, wont run.

remember there are millions of chinese buggys with hundreds of different names, and guys here don't own one. Weather its a Trex a wong dong or dong fu they are not the mainstream here. While the mechanical principals are the same the application of those principals is not the same in china. Thats why we ask for pics.

sorry about your purchase, but you'll get running and enjoy it, and maybe even upgrade to a quality machine.
a little pre purchase research, can save hours of grief.

you need to investigate EVERYTHING from the engine output shaft to the tires and wheels. Engines either run or don't. They only run in one direction, forward/reverse are gear functions.

 

[TheShaww]

In reading this and the other one, i believe there is a communication problem due to terminology. So:
Frozen up usually refers to a mechanical device that is supposed to move but does not regardless of applied force. Applies to sub assemblies such as crankshafts, engines alternators anything that should move but doesn't. (Does not apply to whole vehicles)

bogs generally refers to an engine that runs normal, but stumbles when throttle is opened then returning to normal operation.

It's like you plop the motor right in the mud.
nobody here knows what that is.

sounds like a monster, needs a new muffler?

When I shift, it seems easy enough. It shifts fine but pulling backwards puts it in drive. I believe that is correct, but not 100% sure. Pulling backwards on what?

motor is jammed up, usually meansit won't turn over, wont run.

remember there are millions of chinese buggys with hundreds of different names, and guys here don't own one. Weather its a Trex a wong dong or dong fu they are not the mainstream here. While the mechanical principals are the same the application of those principals is not the same in china. Thats why we ask for pics.

sorry about your purchase, but you'll get running and enjoy it, and maybe even upgrade to a quality machine.
a little pre purchase research, can save hours of grief.

you need to investigate EVERYTHING from the engine output shaft to the tires and wheels. Engines either run or don't. They only run in one direction, forward/reverse are gear functions.

I've been reading here a while and this is the response that I've seen on 90% of the questions, and that's why I tried to make it easy for anyone with common sense to understand. People like you need banned.You can leave my thread. You clearly have no common sense and don't want to help. Please allow others to chime in and take your big IQ to the next one. Sorry I didn't use the terms you'd like me to.

 

[Master Hack]

Wow! Little touchy are ya? Get a sense humor dumbass!

 

[Denny]

Master did the exact right thing by trying to straighten out your terminology. To put it into terms we can understand. And you go and treat him like that? Fix your own kart! I’m out!

 

[ezcome-ezgo]

Disrespecting Master Hack is not a sound strategy for getting advice on this forum. You can call me every name in the book, but Mr Hack has a solid record on here for being knowledgeable, patient and crazy. These are all qualities we admire. Let your guard down a bit, use your sense of humor and listen (or read or whatever).

 

[Hellion]

Thing is, Master Hack was not trying to be rude or poke fun at you (at least that I can tell). Read his post again, but read it in a kind and wise old man’s voice. It’s devoid of any ‘attitude‘ but wise old men often speak directly and bluntly.

Now, can you share some of the videos you have watched that describe this problem? We want to learn more and expand our knowledge base. You can post them here, inline, by clicking the filmstrip icon (it might be hidden until you click the three dots) and pasting the URL.

Can you make a video of your own and upload it to YouTube (then link it here)?