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Old 02-24-2015, 09:33 AM   #1
FTEY   FTEY is offline
 
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Zongshen RX3 carbureted version mods & repairs

Hi, this thread is for all members to discuss about the technical aspects of the carbureted version of the zong rx3. Be it the engine, how the card work, how to meddle with the carb.... And many more. Here are a few photos of the engine from the carburetor version of the bike. Minbe is a KTN RS3(Malaysian version)
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The lever for spare gas
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Old 02-24-2015, 09:38 AM   #2
FTEY   FTEY is offline
 
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Tried looking for te screw to the pilot jet just but cannot determine which was it..... Any idea from the engine pics


 
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Old 02-24-2015, 10:59 AM   #3
Weldangrind   Weldangrind is offline
 
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I can't see it. It might be under the carb, similar to a Mikuni or Keihin round slide.
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Old 02-24-2015, 11:10 AM   #4
Weldangrind   Weldangrind is offline
 
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I looked through a few pages at Taobao, but I didn't spot a carb. If you could find one cheap enough, you could experiment with it and leave your stock carb alone.

Can you use a mirror and get a picture of the underside of the carb?
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Old 02-24-2015, 11:11 AM   #5
SpudRider   SpudRider is offline
 
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Quote:
Originally Posted by FTEY View Post
Tried looking for te screw to the pilot jet just but cannot determine which was it..... Any idea from the engine pics
Look under the carburetor for the PMS screw. Is there a brass cap or a screw located inside the red circle shown in the photograph below?

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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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Old 02-24-2015, 11:17 AM   #6
SpudRider   SpudRider is offline
 
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Check for a brass cap, or a screw at this location.

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"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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Old 02-24-2015, 11:31 AM   #7
Weldangrind   Weldangrind is offline
 
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Way to go, eagle eye!
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Old 02-24-2015, 12:32 PM   #8
FTEY   FTEY is offline
 
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The carb is a Keima PD36J.
Could this be the cap that we were looking for?
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Old 02-24-2015, 01:26 PM   #9
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Seems to be the same as a replacement carb that's being used on the Yamaha YFM 400. ( I think its some kind of quad bike )

http://www.amazon.com/gp/product/B00...4J2RKK6ZBHA4FT

if this is the same as yours then this exploded carb diagram maybe of use

http://www.yamahapartshouse.com/oemp...9a4/carburetor



 
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Old 02-24-2015, 05:35 PM   #10
SpudRider   SpudRider is offline
 
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Quote:
Originally Posted by FTEY View Post
The carb is a Keima PD36J.
Could this be the cap that we were looking for?
I don't think so. I think the PMS is probably located inside the yellow circle.

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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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Old 02-24-2015, 07:38 PM   #11
FTEY   FTEY is offline
 
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Quote:
Originally Posted by SpudRider View Post
I don't think so. I think the PMS is probably located inside the yellow circle.

Based on your guess and also the blown up diagram from katflap, i think you got it....in a way, it's actually hidden.
So I should be sticking the screwdriver into this hole shown in the yellow arrow.
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Old 02-24-2015, 08:26 PM   #12
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Yes. Turn that out. Maybe a 1/2 turn.
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Old 02-24-2015, 08:32 PM   #13
SpudRider   SpudRider is offline
 
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Quote:
Originally Posted by FTEY View Post
Based on your guess and also the blown up diagram from katflap, i think you got it....in a way, it's actually hidden.
So I should be sticking the screwdriver into this hole shown in the yellow arrow.
Is the hole covered by a brass cap? If so, you need to remove the cap first. Have you verified there is a screw inside the hole? If so, that screw is very likely the PMS.

You do adjust the PMS with a small screwdriver. You first need to discover the present setting of the PMS. To do so, slowly tighten the PMS, counting the number of quarter turns until it lightly touches bottom. Don't overtighten the PMS. You merely want to count the number of turns until it lightly touches bottom. For example, you might need to turn the PMS 2-1/4 turns until it lightly touches bottom.

After you record the number of turns needed, loosen the PMS counter-clockwise until you return it to the initial position. Report back, and I will tell you next step.
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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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Old 02-24-2015, 08:35 PM   #14
SpudRider   SpudRider is offline
 
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Quote:
Originally Posted by katoranger View Post
Yes. Turn that out. Maybe a 1/2 turn.
I'd like him to count the number of turns first, so he knows the initial setting, Allen.
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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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Old 02-24-2015, 08:49 PM   #15
FTEY   FTEY is offline
 
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Have not verified if there's a screw in there.
At work now. Will need to get back then I can take a look at it.


 
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