Coolster 3150DX2 "jerking" and loose throttle?

Ak · 02-26-2017, 04:31 PM

Hey guys, still trying to figure out what's causing this new machine to "jerk" when going forward. If I go in reverse, it's smooth. Soon as I put it in forward and push the throttle, it jerks and bounces and I hear loud clacking noises. I thought it was the chain which was super tight so I adjusted it where it has some play and the issue is still there. Also, I'm not sure if this is related but when I press the throttle in (reversing it going forward), the engine revs but I have to press the throttle in far for the atv to actually move. And sometimes I hear a grinding sound and loud clanking sounds when it does start moving which is accompanied by the "jerking" of the machine. Any ideas on this?

ben2go · 02-26-2017, 07:50 PM

It sounds like the centrifugal clutch needs adjusting. I don't know how to do that on those machines. Maybe someone here will chime in. There maybe a video on Youtube showing how to do it. I know some of the older Hondas use the centrifugal clutch set ups.

Ak · 02-26-2017, 10:44 PM

Quote:

Originally Posted by ben2go

It sounds like the centrifugal clutch needs adjusting. I don't know how to do that on those machines. Maybe someone here will chime in. There maybe a video on Youtube showing how to do it. I know some of the older Hondas use the centrifugal clutch set ups.

I'm not sure the coolster 3150dx2 has one of those. It's a full automatic. My taotao 125f1 has one and I recently adjusted it. I don't see anything like that on the coolster.

ben2go · 02-27-2017, 08:02 AM

Quote:

Originally Posted by Ak

I'm not sure the coolster 3150dx2 has one of those. It's a full automatic. My taotao 125f1 has one and I recently adjusted it. I don't see anything like that on the coolster.

I wonder what it uses to couple/uncouple the transmission from the engine.

zackattack91 · 02-27-2017, 09:00 AM

It's a CVT drive. Belt driven, but there is a final gear transmission. I don't know hw to adjust it either. It's the same engine as on Chinese scooters and those little Honda ruckus moped looking things. Search forums on them. Engine model 157qmj. Maybe u can find some info.

**JerryHawk250** · 02-27-2017, 09:40 AM

Have you tried checking the clutch to see if it had any thing broken? Maybe a spring loose or broke. But I don't think it has anything to do with the clutch as the clutch is always turning the same direction. If it does it in forward it should do the same in reverse. May be in the transmission it self. Its hard to diagnose with out it being in front of me. Take and post a video will help.

Ak · 02-28-2017, 07:52 PM

Here are some videos. 1 shows jerking and clanking when it finally decides to move. 2 shows it not moving at all.

https://vimeo.com/206163174

https://vimeo.com/206162990

FLASHLIGHTBOY · 03-01-2017, 04:20 PM

Hello....your gearbox shifter is not adjusted right... you can take off the link to he box from your gear shifter and you will see it can go more.. so it is in gear completey.. simple adjustment.. some one else had this problem acouple of post ago... but remove the link and see the main link will go into gear FULLY then... reinstall link when fully in gear... and then check reverse gear... DO NOT GEAR AND REV LIKE THIS.... HARD ON THE GEARBOX.... this is how people give the Chinese brand a bad name... since the buyer assembles it you are responsible to adjust stuff... the dealer if sold assembled is respossible.. thanks

zackattack91 · 03-01-2017, 04:28 PM

You need to adjust the nut on your throttle cable for sure. Way too much play in the thumb throttle before the cable is opening the carb. Need an 8mm wrench and pliers. Or 2 8mm wrenches is better. Loosen the lock nut and twist the adjuster till you have only a little play in the throttle then tighten the lock nut against the adjuster. That will solve that minor issue. Not sure how to adjust the gear shifter box though.

Quote:

Originally Posted by Ak

Here are some videos. 1 shows jerking and clanking when it finally decides to move. 2 shows it not moving at all.

https://vimeo.com/206163174

https://vimeo.com/206162990

**JerryHawk250** · 03-01-2017, 04:29 PM

Quote:

Originally Posted by FLASHLIGHTBOY

Hello....your gearbox shifter is not adjusted right... you can take off the link to he box from your gear shifter and you will see it can go more.. so it is in gear completey.. simple adjustment.. some one else had this problem acouple of post ago... but remove the link and see the main link will go into gear FULLY then... reinstall link when fully in gear... and then check reverse gear... DO NOT GEAR AND REV LIKE THIS.... HARD ON THE GEARBOX.... this is how people give the Chinese brand a bad name... since the buyer assembles it you are responsible to adjust stuff... the dealer if sold assembled is respossible.. thanks

2x on this. Thanks , Video helped. Sorry didn't get back to you on this yesterday. I live in south Louisiana. Everything was shut down for Mardi Gras. Besides I was too busy DJing on one of the floats. lol . Nice warm day and lots nice sites on the route if you know what I mean.

Ak · 03-01-2017, 08:18 PM

Thanks for the replies fellas. I'm attaching some videos showing more issues which is probably the throttle and also some pics to see if you guys can pin point those thing you all mention such as gear box, links, throttle locknuts. I can't seem to find or locate these thing because I have no idea what you all are talking about.... "yes, this is the first time i'm messing with engines and carbs and stuff, sorry".

P.S. I have no idea why they made this thing the way it is. It's impossible to get to the carburetor on this or even that cable that's coming from the throttle which is behind that black bar which is the frame of the atv. On my TaoTao 125f1, everything is easily accessible so kudos to TaoTao and thumbs down to the Coolster.

Ak · 03-01-2017, 08:24 PM

Oops, forgot the videos.

https://vimeo.com/206328744

https://vimeo.com/206328457

ben2go · 03-01-2017, 09:44 PM

Quote:

Originally Posted by Ak

Oops, forgot the videos.

https://vimeo.com/206328744

https://vimeo.com/206328457

That sounds like either a serious vacuum leak between the carb and engine or fuel starvation. Try that with the fuel cap off. If it gets better, the cap vent may be blocked. There could also be something blocking the carb float bowl vent, causing the carb to stop flowing fuel. There's also the possibility that some crap got into the carb and plugged the jets.

BlackBike · 03-02-2017, 12:04 AM

Quote:

Originally Posted by JerryHawk250

2x on this. Thanks , Video helped. Sorry didn't get back to you on this yesterday. I live in south Louisiana. Everything was shut down for Mardi Gras. Besides I was too busy DJing on one of the floats. lol . Nice warm day and lots nice sites on the route if you know what I mean.

No,what do you mean? Pics?

**JerryHawk250** · 03-02-2017, 09:21 AM

Quote:

Originally Posted by BlackBike

No,what do you mean? Pics?

I would get kicked off the forum if I posted those pictures. lol

02-26-2017, 04:31 PM	#1
Ak Join Date: Feb 2017 Posts: 28	Coolster 3150DX2 "jerking" and loose throttle? Hey guys, still trying to figure out what's causing this new machine to "jerk" when going forward. If I go in reverse, it's smooth. Soon as I put it in forward and push the throttle, it jerks and bounces and I hear loud clacking noises. I thought it was the chain which was super tight so I adjusted it where it has some play and the issue is still there. Also, I'm not sure if this is related but when I press the throttle in (reversing it going forward), the engine revs but I have to press the throttle in far for the atv to actually move. And sometimes I hear a grinding sound and loud clanking sounds when it does start moving which is accompanied by the "jerking" of the machine. Any ideas on this?
	0

02-27-2017, 09:00 AM	#5
zackattack91 Join Date: Dec 2016 Location: New Jersey Posts: 86	It's a CVT drive. Belt driven, but there is a final gear transmission. I don't know hw to adjust it either. It's the same engine as on Chinese scooters and those little Honda ruckus moped looking things. Search forums on them. Engine model 157qmj. Maybe u can find some info. __________________ 2016 Coolster 3150-DX2
	1

02-27-2017, 09:40 AM	#6
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,535	Have you tried checking the clutch to see if it had any thing broken? Maybe a spring loose or broke. But I don't think it has anything to do with the clutch as the clutch is always turning the same direction. If it does it in forward it should do the same in reverse. May be in the transmission it self. Its hard to diagnose with out it being in front of me. Take and post a video will help. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel Last edited by JerryHawk250; 02-27-2017 at 04:00 PM.
	0

03-01-2017, 04:20 PM	#8
FLASHLIGHTBOY Join Date: May 2009 Location: SASKATOON Posts: 1,161	transmission Hello....your gearbox shifter is not adjusted right... you can take off the link to he box from your gear shifter and you will see it can go more.. so it is in gear completey.. simple adjustment.. some one else had this problem acouple of post ago... but remove the link and see the main link will go into gear FULLY then... reinstall link when fully in gear... and then check reverse gear... DO NOT GEAR AND REV LIKE THIS.... HARD ON THE GEARBOX.... this is how people give the Chinese brand a bad name... since the buyer assembles it you are responsible to adjust stuff... the dealer if sold assembled is respossible.. thanks __________________ DEALER FOR ZSTAR & GIO PRODUCTS, TAOTAO ABIBABA ATV ETC
	2

02-26-2017, 07:50 PM	#2
ben2go Join Date: Jun 2011 Posts: 1,335	It sounds like the centrifugal clutch needs adjusting. I don't know how to do that on those machines. Maybe someone here will chime in. There maybe a video on Youtube showing how to do it. I know some of the older Hondas use the centrifugal clutch set ups.
	0

02-28-2017, 07:52 PM	#7
Ak Join Date: Feb 2017 Posts: 28	Here are some videos. 1 shows jerking and clanking when it finally decides to move. 2 shows it not moving at all. https://vimeo.com/206163174 https://vimeo.com/206162990
	0

03-01-2017, 08:24 PM	#12
Ak Join Date: Feb 2017 Posts: 28	Oops, forgot the videos. https://vimeo.com/206328744 https://vimeo.com/206328457
	0