Zongshen RX3 carbureted version mods & repairs - Page 2

Weldangrind · 02-24-2015, 11:13 PM

Finding a way to turn that screw (if equipped) is the challenge. I use a tiny hex ratchet with a flat head screwdriver bit.

FTEY · 02-25-2015, 01:08 AM

i guessed so. the space available is close to none.....haha.....went out just now and experienced the same thing again. Was at the traffic light, in 1st gear, clutch fully pressed...engine died while idling and took a few attempts to start it back.

SpudRider · 02-25-2015, 01:42 AM

Quote:

Originally Posted by FTEY

i guessed so. the space available is close to none.....haha.....went out just now and experienced the same thing again. Was at the traffic light, in 1st gear, clutch fully pressed...engine died while idling and took a few attempts to start it back.

Perhaps you merely need to increase the idle speed.

The idle speed adjuster is shown inside the yellow circle in the photograph below. Merely tighten, or loosen the screw to adjust the idle speed of the engine.

Adventore · 02-25-2015, 02:17 AM

Hi, I own a KTN RS3 too. I am from Penang, Malaysia. I am having problem for both engine cold start and restart after engine is warmed up. The engine died after engaging the first gear even though the clutch lever is fully pressed. My current RPM setting is around 1.8k to 2k. I think it is too high. and I often smell fuel from the exhaust. I will send my bike back to tuning this Saturday since it is still under warranty.

If you would like to tune the carb by yourself, make sure that you do it after the engine is warmed up.

Cheers

SpudRider · 02-25-2015, 02:27 AM

Quote:

Originally Posted by Adventore

Hi, I own a KTN RS3 too. I am from Penang, Malaysia. I am having problem for both engine cold start and restart after engine is warmed up. The engine died after engaging the first gear even though the clutch lever is fully pressed. My current RPM setting is around 1.8k to 2k. I think it is too high. and I often smell fuel from the exhaust. I will send my bike back to tuning this Saturday since it is still under warranty.

If you would like to tune the carb by yourself, make sure that you do it after the engine is warmed up.

Cheers

Welcome; we are glad you joined us.

Your problems also sound as if they might be caused by an improper adjustment of the pilot mixture screw (PMS). Indeed, the PMS should be adjusted when the engine is hot. I emphasize, the engine must be hot, not warm.

After your problem is resolved, please let us know how it was fixed.

Adventore · 02-25-2015, 02:31 AM

Quote:

Originally Posted by SpudRider

Welcome; we are glad you joined us.

Your problems also sound as if they might be caused by an improper adjustment of the pilot mixture screw (PMS). Indeed, the PMS should be adjusted when the engine is hot. I emphasize, the engine must be hot, not warm.

After your problem is resolved, please let us know how it was fixed.

I will make sure my both eyes are glued to my bike when they are tuning my bike.

Weldangrind · 02-25-2015, 02:41 AM

Quote:

Originally Posted by Adventore

Hi, I own a KTN RS3 too. I am from Penang, Malaysia. I am having problem for both engine cold start and restart after engine is warmed up. The engine died after engaging the first gear even though the clutch lever is fully pressed. My current RPM setting is around 1.8k to 2k. I think it is too high. and I often smell fuel from the exhaust. I will send my bike back to tuning this Saturday since it is still under warranty.

If you would like to tune the carb by yourself, make sure that you do it after the engine is warmed up.

Cheers

Welcome! Thanks for signing up. Please show us pics of your bike.

SpudRider · 02-25-2015, 02:50 AM

X2.

If you have time, please post a thread in our Introduce Yourself forum, and include photographs of your KTN RS3. We love to view photos from different parts of our world.

Adventore · 02-25-2015, 03:00 AM

Quote:

Originally Posted by Weldangrind

Welcome! Thanks for signing up. Please show us pics of your bike.

Not sure am I doing this right. I haven't posted in forum for a long long time. Please let me know if you all can view it.

I have changed the top box to bigger box. The rest remain the same as the rest of the world.

Adventore · 02-25-2015, 03:05 AM

Quote:

Originally Posted by SpudRider

X2.

If you have time, please post a thread in our Introduce Yourself forum, and include photographs of your KTN RS3. We love to view photos from different parts of our world.

How can I find the thread? Please advise.

Adventore · 02-25-2015, 03:13 AM

Quote:

Originally Posted by SpudRider

Welcome; we are glad you joined us.

Your problems also sound as if they might be caused by an improper adjustment of the pilot mixture screw (PMS). Indeed, the PMS should be adjusted when the engine is hot. I emphasize, the engine must be hot, not warm.

After your problem is resolved, please let us know how it was fixed.

Thanks. I really hope that they can solve my problem by just adjusting the PMS.

FTEY · 02-25-2015, 04:35 AM

Quote:

Originally Posted by Adventore

Thanks. I really hope that they can solve my problem by just adjusting the PMS.

Hello fellow Penangite Adventore.
Where did you get your bike. looks like the idling thing is a common prob for new bikes.
What box did you get? am looking for one also coz the current one is just a bit too small.

Adventore · 02-25-2015, 05:16 AM

Quote:

Originally Posted by FTEY

Hello fellow Penangite Adventore.
Where did you get your bike. looks like the idling thing is a common prob for new bikes.
What box did you get? am looking for one also coz the current one is just a bit too small.

FTEY. I got my bike from one of the motorcycle shop at mainland of Penang State. The brand of the box that I changed is Coocase. Model number S48-L Luxury.

SpudRider · 02-25-2015, 05:31 AM

Quote:

Originally Posted by Adventore

How can I find the thread? Please advise.

I'm sorry; the correct name of the forum is New Member Introductions.

If you have time, please post a new thread and introduce yourself to our community at the following link.

http://www.chinariders.net/forumdisplay.php?f=112

FTEY · 02-25-2015, 06:17 AM

Confirmed there's a brass screw under that carb and it should be the PMS screw.
Problem now is getting there is a pain. Space is so small. Cant even get the smallest screwdriver in there let alone my hand or fingers. And with the hot engine right in front...... Unless you have an angled screwdriver or the long flexible ones.... Guess i need to send it to the shop to do it.

02-24-2015, 11:13 PM	#16
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Finding a way to turn that screw (if equipped) is the challenge. I use a tiny hex ratchet with a flat head screwdriver bit. __________________ 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
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02-25-2015, 02:50 AM	#23
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	X2. If you have time, please post a thread in our Introduce Yourself forum, and include photographs of your KTN RS3. We love to view photos from different parts of our world. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
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02-25-2015, 01:08 AM	#17
FTEY Join Date: Feb 2015 Posts: 48	i guessed so. the space available is close to none.....haha.....went out just now and experienced the same thing again. Was at the traffic light, in 1st gear, clutch fully pressed...engine died while idling and took a few attempts to start it back.
	0

02-25-2015, 02:17 AM	#19
Adventore Join Date: Feb 2015 Location: Penang, Malaysia Posts: 23	Hi, I own a KTN RS3 too. I am from Penang, Malaysia. I am having problem for both engine cold start and restart after engine is warmed up. The engine died after engaging the first gear even though the clutch lever is fully pressed. My current RPM setting is around 1.8k to 2k. I think it is too high. and I often smell fuel from the exhaust. I will send my bike back to tuning this Saturday since it is still under warranty. If you would like to tune the carb by yourself, make sure that you do it after the engine is warmed up. Cheers
	0

02-25-2015, 06:17 AM	#30
FTEY Join Date: Feb 2015 Posts: 48	Confirmed there's a brass screw under that carb and it should be the PMS screw. Problem now is getting there is a pain. Space is so small. Cant even get the smallest screwdriver in there let alone my hand or fingers. And with the hot engine right in front...... Unless you have an angled screwdriver or the long flexible ones.... Guess i need to send it to the shop to do it.
	0