ATV-X21 125cc ATV

Mist · 09-21-2016, 08:18 AM

Yes , i was wondering if anyone could assist me on figuring out why my 4 wheeler is not capable of doing donuts. When i give it full throttle is just dies. But reverse it spins tires just not forward. I got the 125c hunter chinese ATV.
I have taken the carb off and cleaned it and made sure nothing was in there so thats off the menu , i adjusted the carb to best i could. Something else is making it where it doesn't do 100% power at full throttle and dies. Would like opinions or if you know of any parts that can replace easily and cheaply would be awesome to make this ATV a bit more enjoyable.

Agian it's the 125 cc hunter model with the back and front rack and headlights.

Mist · 09-21-2016, 08:24 AM

forgot to mention i replaced the air filter with filter similar to this http://www.ebay.com/itm/like/3809383...&ul_noapp=true

Weldangrind · 09-21-2016, 11:10 AM

My guess is that it takes off in reverse due to steeper gearing. It isn't making the necessary torque to take off in a higher gear.

I'm betting that the stock exhaust is very restrictive and that the carb is set up quite lean.

Mist · 09-21-2016, 05:16 PM

Quote:

Originally Posted by Weldangrind

My guess is that it takes off in reverse due to steeper gearing. It isn't making the necessary torque to take off in a higher gear.

I'm betting that the stock exhaust is very restrictive and that the carb is set up quite lean.

Can i order new exhaust online for this? What type would you order sir? And i am still using original carb , i heard they are POS so i was wondering what type carb could i purchase as a upgrade.

pete · 09-22-2016, 03:29 AM

gearing in reverse is usaly lower..
also weight transfur.... when taking off forward
the weight transfurs to the rear wheels...
taking off in reverse the weight is transfured to
the front wheels making the rear lighter / less traction...

...

Weldangrind · 09-22-2016, 12:01 PM

Quote:

Originally Posted by Mist

Can i order new exhaust online for this? What type would you order sir? And i am still using original carb , i heard they are POS so i was wondering what type carb could i purchase as a upgrade.

A little digging on eBay should produce a clamp-on muffler that will work with your existing head pipe. Even if it's a little large on the inlet, some creativity with tube steel adapters should get it done. If you're looking to ride in forested areas, ensure that the muffler is USFS approved.

The carb selection will depend upon what's on there now. Can you show us a pic of the carb? Show us the air box as well.

Mist · 09-22-2016, 06:18 PM

Quote:

Originally Posted by Weldangrind

A little digging on eBay should produce a clamp-on muffler that will work with your existing head pipe. Even if it's a little large on the inlet, some creativity with tube steel adapters should get it done. If you're looking to ride in forested areas, ensure that the muffler is USFS approved.

The carb selection will depend upon what's on there now. Can you show us a pic of the carb? Show us the air box as well.

Will do this tomorrow , rain has came in today!

Mist · 09-22-2016, 07:25 PM

from what i can tell , this one is the same as the one on my 4 wheeler

https://www.amazon.com/EVINIS-Carbur...D4P7T1S18ZV6VD

and for the clamp on , could you suggest me a muffler that would be good?

I'm not to good on looking for stuff.

Weldangrind · 09-23-2016, 10:40 AM

This could be a nice upgrade from your existing carb, but it's up to you to confirm measurements: http://www.ebay.com/itm/Mikuni-Carbu...NXa5xM&vxp=mtr

Once it's in your hands, you may have to swap the main or slow jets (or both) to make it perfect.

What is the diameter of your existing mid pipe, right where it meets the muffler?

09-21-2016, 08:18 AM	#1
Mist Join Date: Sep 2016 Posts: 5	ATV-X21 125cc ATV Yes , i was wondering if anyone could assist me on figuring out why my 4 wheeler is not capable of doing donuts. When i give it full throttle is just dies. But reverse it spins tires just not forward. I got the 125c hunter chinese ATV. I have taken the carb off and cleaned it and made sure nothing was in there so thats off the menu , i adjusted the carb to best i could. Something else is making it where it doesn't do 100% power at full throttle and dies. Would like opinions or if you know of any parts that can replace easily and cheaply would be awesome to make this ATV a bit more enjoyable. Agian it's the 125 cc hunter model with the back and front rack and headlights.
	0

09-21-2016, 11:10 AM	#3
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	My guess is that it takes off in reverse due to steeper gearing. It isn't making the necessary torque to take off in a higher gear. I'm betting that the stock exhaust is very restrictive and that the carb is set up quite lean. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

09-22-2016, 03:29 AM	#5
pete Join Date: Jan 2012 Location: ChCh , NZ Posts: 2,261	gearing in reverse is usaly lower.. also weight transfur.... when taking off forward the weight transfurs to the rear wheels... taking off in reverse the weight is transfured to the front wheels making the rear lighter / less traction... ... __________________ 09 XT660R ... 06 TTR250 ... 80 Montesa H6 125 Enduro... 77 Montesa Cota 348 MRR "Malcom Rathnell Replica"... Current resto projects.. 81 Honda CT110... 80 Kawasaki KL250A1... 11 Husaburg TE125 enduro... "sold" along with another 31... Lifan 125 Pitbike.. "stolen" ... KIWI BIKER FORUM...... http://www.kiwibiker.co.nz/forums/content.php All the best offroad rides in NZ... http://www.remotemoto.com/ E-mail... xtpete1@gmail.com
	0

09-23-2016, 10:40 AM	#9
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	This could be a nice upgrade from your existing carb, but it's up to you to confirm measurements: http://www.ebay.com/itm/Mikuni-Carbu...NXa5xM&vxp=mtr Once it's in your hands, you may have to swap the main or slow jets (or both) to make it perfect. What is the diameter of your existing mid pipe, right where it meets the muffler? __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

09-21-2016, 08:24 AM	#2
Mist Join Date: Sep 2016 Posts: 5	forgot to mention i replaced the air filter with filter similar to this http://www.ebay.com/itm/like/3809383...&ul_noapp=true
	0

09-22-2016, 07:25 PM	#8
Mist Join Date: Sep 2016 Posts: 5	from what i can tell , this one is the same as the one on my 4 wheeler https://www.amazon.com/EVINIS-Carbur...D4P7T1S18ZV6VD and for the clamp on , could you suggest me a muffler that would be good? I'm not to good on looking for stuff.
	0