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-   -   Zongshen RX3 carbureted version mods & repairs (http://www.chinariders.net/showthread.php?t=14455)

FTEY 02-24-2015 09:33 AM

Zongshen RX3 carbureted version mods & repairs
 
5 Attachment(s)
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)
Attachment 2347

Attachment 2348

Attachment 2349

Attachment 2350
The lever for spare gas
Attachment 2351

FTEY 02-24-2015 09:38 AM

Tried looking for te screw to the pilot jet just but cannot determine which was it..... Any idea from the engine pics

Weldangrind 02-24-2015 10:59 AM

I can't see it. It might be under the carb, similar to a Mikuni or Keihin round slide.

Weldangrind 02-24-2015 11:10 AM

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?

SpudRider 02-24-2015 11:11 AM

Quote:

Originally Posted by FTEY (Post 180212)
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?

http://i442.photobucket.com/albums/q...pskdjn6ym4.jpg

SpudRider 02-24-2015 11:17 AM

Check for a brass cap, or a screw at this location.

http://i442.photobucket.com/albums/q...psumecno3n.jpg

Weldangrind 02-24-2015 11:31 AM

Way to go, eagle eye! :D

FTEY 02-24-2015 12:32 PM

1 Attachment(s)
The carb is a Keima PD36J.
Could this be the cap that we were looking for?
Attachment 2353

katflap 02-24-2015 01:26 PM

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

:)

SpudRider 02-24-2015 05:35 PM

Quote:

Originally Posted by FTEY (Post 180235)
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.

http://i442.photobucket.com/albums/q...psbhyc1t3u.jpg

FTEY 02-24-2015 07:38 PM

1 Attachment(s)
Quote:

Originally Posted by SpudRider (Post 180242)
I don't think so. I think the PMS is probably located inside the yellow circle.

http://i442.photobucket.com/albums/q...psbhyc1t3u.jpg

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.
Attachment 2354

katoranger 02-24-2015 08:26 PM

Yes. Turn that out. Maybe a 1/2 turn.

SpudRider 02-24-2015 08:32 PM

Quote:

Originally Posted by FTEY (Post 180246)
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. :ohno: 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. ;)

SpudRider 02-24-2015 08:35 PM

Quote:

Originally Posted by katoranger (Post 180249)
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. ;)

FTEY 02-24-2015 08:49 PM

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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