Zongshen RX3 carbureted version mods & repairs - Page 5

classix_man · 03-03-2015, 10:51 AM

Quote:

Originally Posted by FTEY

Bike is doing well. Just hit the 600km mark today. They just did adjustments on the PMS settings. Can be even better if the carb is slightly tuned a bit. Will send my bike in again for the carb tuning tomorrow. Will need to leave it for the day. They will help adjust the clutch as well. Will keep you posted on any new findings

Thanks a lot FTEY!!

SpudRider · 03-03-2015, 12:08 PM

Quote:

Originally Posted by FTEY

This is the approximate measurement of the sprocket
The Sprocket reads WLJF 44-520

Thank you.

Adventore · 03-04-2015, 10:54 PM

I went out for lunch together with a colleague who owns a Honda CBX 750cc yesterday. I noticed that my speed indicated on the Odometer is not same as the CBX. My friend told me that he was riding at about 100km/h. But mine indicated 120km/h.

After lunch, we tried to verify again. This time, I am asking my friend to ride at 90km/h and I try to keep up. The speed indicated on my odometer this time is around 107km/h average.

So, if I were to follow them (the CBX team) in convoy to other places, I will have a hard time to keep up with their speed. Those bikes can easily reach 140km/h on highway.

SpudRider · 03-04-2015, 11:58 PM

Yes, the Zongshen speedometer is at least 15% 'optimistic.'

Weldangrind · 03-05-2015, 01:58 AM

Quote:

Originally Posted by Adventore

I went out for lunch together with a colleague who owns a Honda CBX 750cc yesterday. I noticed that my speed indicated on the Odometer is not same as the CBX. My friend told me that he was riding at about 100km/h. But mine indicated 120km/h.

After lunch, we tried to verify again. This time, I am asking my friend to ride at 90km/h and I try to keep up. The speed indicated on my odometer this time is around 107km/h average.

So, if I were to follow them (the CBX team) in convoy to other places, I will have a hard time to keep up with their speed. Those bikes can easily reach 140km/h on highway.

It would be nice to be able to correct the speedometer, but I don't think you can. I presume it to be designed for a 21" front wheel.

You could always add a small digital speedometer that uses a magnet on the front wheel. Several of us have done that.

A GPS / Satnav device would also do the trick.

Xtyling · 03-05-2015, 03:08 AM

Even if the 250cc had an accurate speedometer. Asking a 250cc to keep up with a pack of 750's running on their top end seems like a tall order. I'm sure if the 750's were priced to equal the 250 then it would be a fair order.

FTEY · 03-05-2015, 10:59 AM

Quote:

Originally Posted by Xtyling

Even if the 250cc had an accurate speedometer. Asking a 250cc to keep up with a pack of 750's running on their top end seems like a tall order. I'm sure if the 750's were priced to equal the 250 then it would be a fair order.

Lets gather a few of the existing rs3s here. Hopefully there will be more

FTEY · 03-05-2015, 11:05 AM

Just got my bike back from the shop after the carb tuning. Clutch is lighter compared to stock. Much easier to control. The carb resetting makes the throttle response better. I feel the bike's engine is lighter when its on the go. Another thing happened after all the setting is i noticed deceleration popping sound from the exhaust. Read around some other forums and articles. Apparently they said that the decel pop happens when the motor is tuned to perform at its best and its leaner. I will try on he cold start tmrw morning when i head to work. Will tell more....

SpudRider · 03-05-2015, 11:09 AM

Did the shop only adjust the PMS, or did they also change the carburetor jets?

FTEY · 03-05-2015, 11:30 AM

Quote:

Originally Posted by SpudRider

Did the shop only adjust the PMS, or did they also change the carburetor jets?

They told me no jets was changed. They say they just took out the carb and made some internal adjustments. And balance up the PMS and air tuning. Thats all.

SpudRider · 03-05-2015, 11:56 AM

That's great. I thought the PMS was the problem.

katoranger · 03-05-2015, 12:20 PM

North America must be getting the male versions without PMS.

Weldangrind · 03-06-2015, 12:01 AM

Quote:

Originally Posted by katoranger

North America must be getting the male versions without PMS.

FTEY · 03-07-2015, 10:51 PM

I think the tuning might have been too lean. Sometimes the engine stalled while going down slopes with clutch fully pressed, difficulty to cold start and decel popping on exhaust. All seems like pointing towards the bike running too lean.

Weldangrind · 03-08-2015, 09:19 AM

Quote:

Originally Posted by FTEY

I think the tuning might have been too lean. Sometimes the engine stalled while going down slopes with clutch fully pressed, difficulty to cold start and decel popping on exhaust. All seems like pointing towards the bike running too lean.

That makes sense. Are those symptoms gone?

03-04-2015, 11:58 PM	#64
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Yes, the Zongshen speedometer is at least 15% 'optimistic.' __________________ 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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03-05-2015, 11:09 AM	#69
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Did the shop only adjust the PMS, or did they also change the carburetor jets? __________________ 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
	0

03-05-2015, 11:56 AM	#71
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	That's great. I thought the PMS was the problem. __________________ 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
	0

03-05-2015, 12:20 PM	#72
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	North America must be getting the male versions without PMS. __________________ You meet the nicest people on a Honda Clone.
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03-04-2015, 10:54 PM	#63
Adventore Join Date: Feb 2015 Location: Penang, Malaysia Posts: 23	I went out for lunch together with a colleague who owns a Honda CBX 750cc yesterday. I noticed that my speed indicated on the Odometer is not same as the CBX. My friend told me that he was riding at about 100km/h. But mine indicated 120km/h. After lunch, we tried to verify again. This time, I am asking my friend to ride at 90km/h and I try to keep up. The speed indicated on my odometer this time is around 107km/h average. So, if I were to follow them (the CBX team) in convoy to other places, I will have a hard time to keep up with their speed. Those bikes can easily reach 140km/h on highway.
	0

03-05-2015, 03:08 AM	#66
Xtyling Join Date: Feb 2015 Posts: 13	Even if the 250cc had an accurate speedometer. Asking a 250cc to keep up with a pack of 750's running on their top end seems like a tall order. I'm sure if the 750's were priced to equal the 250 then it would be a fair order.
	0

03-05-2015, 11:05 AM	#68
FTEY Join Date: Feb 2015 Posts: 48	Just got my bike back from the shop after the carb tuning. Clutch is lighter compared to stock. Much easier to control. The carb resetting makes the throttle response better. I feel the bike's engine is lighter when its on the go. Another thing happened after all the setting is i noticed deceleration popping sound from the exhaust. Read around some other forums and articles. Apparently they said that the decel pop happens when the motor is tuned to perform at its best and its leaner. I will try on he cold start tmrw morning when i head to work. Will tell more....
	0

03-07-2015, 10:51 PM	#74
FTEY Join Date: Feb 2015 Posts: 48	I think the tuning might have been too lean. Sometimes the engine stalled while going down slopes with clutch fully pressed, difficulty to cold start and decel popping on exhaust. All seems like pointing towards the bike running too lean.
	0