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Forum: Zongshen RX4 04-18-2024, 10:08 PM
Replies: 8
Views: 655
Posted By pyoungbl
Himma has the advantage of after market support,...

Himma has the advantage of after market support, as well as a dealer network. If you are handy, can do normal maintenance yourself, and are happy with the RX4 as delivered, there is a significant...
Forum: Zongshen RX4 04-02-2024, 08:46 PM
Replies: 6
Views: 691
Posted By pyoungbl
You can test for combustion gas in the...

You can test for combustion gas in the coolant....blown head gasket will test positive. Amazon has the test kit for about $21. Also look at the radiator cap. It could be letting coolant out at low...
Forum: Zongshen RX4 07-31-2023, 04:46 PM
Replies: 10
Views: 1,204
Posted By pyoungbl
Sounds like you have isolated the problem. ...

Sounds like you have isolated the problem. That's a really odd failure. It would be interesting to learn what caused this.
Forum: Zongshen RX4 07-29-2023, 12:33 PM
Replies: 10
Views: 1,204
Posted By pyoungbl
Lots more information here: ...

Lots more information here: https://adventuremotorcycle.com/tech-n-tips/mosfet-regulator-upgrade-rmstator#:~:text=The%20regulator%20function%20of%20a,enough%2C%20and%20therefore%20fully%20charged.
Forum: Zongshen RX4 07-29-2023, 12:30 PM
Replies: 10
Views: 1,204
Posted By pyoungbl
You should be seeing 14V with the engine running...

You should be seeing 14V with the engine running at about 3K rpm. Sounds like you are getting nothing from the charging system. After you check the connections to insure they are solid you are left...
Forum: Zongshen RX4 05-27-2023, 11:24 AM
Replies: 6
Views: 1,036
Posted By pyoungbl
Please post lots of details about your progress. ...

Please post lots of details about your progress. If nothing less, hydro clutch action eliminates the possibility of a broken clutch cable as well as the friction associated with the cable.
Forum: Zongshen RX4 05-26-2023, 04:28 PM
Replies: 17
Views: 4,139
Posted By pyoungbl
Yep, you found the problem. It's clear that the...

Yep, you found the problem. It's clear that the thermostat could not open fully. Smart to throw the Torch plug in the trash. I think the bike will start easier now and run within the temp specs.
...
Forum: Zongshen RX4 05-19-2023, 10:53 AM
Replies: 9
Views: 1,220
Posted By pyoungbl
Hi David, the RX3 is smaller and lighter so...

Hi David, the RX3 is smaller and lighter so better suited for trail riding...if you mean jeep trails, not goat trails. It's still low on grunt and the suspension is never going to be up to the task...
Forum: Zongshen RX4 05-19-2023, 10:43 AM
Replies: 17
Views: 4,139
Posted By pyoungbl
Your bike should not be running so hot. My first...

Your bike should not be running so hot. My first thought is thermostat not opening correctly. If you do replace the thermostat it's good time to swap the fluid although the fluid is so new it...
Forum: Zongshen RX4 05-14-2023, 08:52 AM
Replies: 25
Views: 2,775
Posted By pyoungbl
When you stop by let's make sure we talk about...

When you stop by let's make sure we talk about the extended side stand. It's a real improvement over OEM because the bike does not lean nearly as far. With your connections at the shipyard I think...
Forum: Zongshen RX4 05-02-2023, 07:25 AM
Replies: 25
Views: 2,775
Posted By pyoungbl
Clutch Problem

Where in Virginia are you located? I'm in Portsmouth and might be able to help.

Peter Y.
Forum: Zongshen RX4 03-03-2023, 11:54 AM
Replies: 16
Views: 4,036
Posted By pyoungbl
There are window shoppers looking to find more...

There are window shoppers looking to find more info about China bikes in general and RX4 in particular. Going to the RX4 forum is likely to highlight any and every shortcoming of the bike since...
Forum: Zongshen RX4 02-15-2023, 08:10 PM
Replies: 11
Views: 3,915
Posted By pyoungbl
What I know is that my friend took a bike into...

What I know is that my friend took a bike into his shop for service. The owner had installed a Lithium battery. While the shop was closed for a long weekend (Labor Day?) the shop caught on fire. ...
Forum: Zongshen RX4 02-13-2023, 11:13 AM
Replies: 11
Views: 3,915
Posted By pyoungbl
The clock is constantly draining a tiny amount of...

The clock is constantly draining a tiny amount of current from the battery. The ECU is probably sucking a few electrons too, just to maintain settings. My '21 RX4 is still running the OEM battery...
Forum: Zongshen RX4 02-02-2023, 11:26 AM
Replies: 11
Views: 3,915
Posted By pyoungbl
If you look at the RX4 frame you will see that...

If you look at the RX4 frame you will see that there are no good mounting points for a center stand. On the RX3 it is possible to mount a center stand using lugs which are present from the...
Forum: Zongshen RX4 12-10-2022, 10:16 AM
Replies: 13
Views: 2,570
Posted By pyoungbl
Any update??

Any update??
Forum: Zongshen RX4 11-30-2022, 09:47 AM
Replies: 23
Views: 3,227
Posted By pyoungbl
I have a good copy of the 2020 diagram, easy to...

I have a good copy of the 2020 diagram, easy to read. My intent was to see if I could spot the differences. When I enlarge the file you sent it's unreadable. Mine is a .pdf and yours is a...
Forum: Zongshen RX4 11-29-2022, 09:50 AM
Replies: 23
Views: 3,227
Posted By pyoungbl
Thanks for the wiring diagram. It's pretty hard...

Thanks for the wiring diagram. It's pretty hard to read. I'm guessing that has to do with the fact that it has been copied, compressed, and re-formatted a few times.

I have not had any...
Forum: Zongshen RX4 11-26-2022, 07:37 PM
Replies: 23
Views: 3,227
Posted By pyoungbl
Hi Bob, just tried to download the wiring...

Hi Bob, just tried to download the wiring diagram. That site wants me to join in order to do any downloads. Pls send me the wiring diagram...pyoungbl@aol.com. I already have one for the 2020 RX4...
Forum: Zongshen RX4 11-16-2022, 09:59 AM
Replies: 13
Views: 2,570
Posted By pyoungbl
Although it would be nice if the RX4 tool kit was...

Although it would be nice if the RX4 tool kit was all you need for basic maintenance that's not the case. You will need, at a minimum, a 3mm allen wrench just to get the plastic panels off. I'd...
Forum: Zongshen RX4 10-18-2022, 10:17 AM
Replies: 17
Views: 3,047
Posted By pyoungbl
The OEM tires are OK for street and some mild off...

The OEM tires are OK for street and some mild off road riding. You will see that the tread is kinda shallow for anything like mud or sand. I like Shinko 705s but they are really only a bit better...
Forum: Zongshen RX4 09-22-2022, 09:52 AM
Replies: 7
Views: 2,190
Posted By pyoungbl
I'm in southern Virginia...not all that close to...

I'm in southern Virginia...not all that close to PA but still not on the other side of the world. If you get to this part of the world I'd be happy to help you out. My 2021 is virtually identical...
Forum: Zongshen RX4 07-28-2022, 06:01 PM
Replies: 9
Views: 1,937
Posted By pyoungbl
For the RX4, give some thought to anchoring the...

For the RX4, give some thought to anchoring the bags to the rear subframe, the way the OEM racks are built. Mine are secured by two 8mm (or might be 10mm) bolts. This frame angles down from the...
Forum: Zongshen RX4 07-20-2022, 12:03 PM
Replies: 102
Views: 14,216
Posted By pyoungbl
JFOliver, the spoofer i used was supposed to be...

JFOliver, the spoofer i used was supposed to be set up specifically for my bike. I'm not convinced that was actually the case. As for the intake, there was no obstruction as evidenced by the fact...
Forum: Zongshen RX4 07-19-2022, 04:35 PM
Replies: 102
Views: 14,216
Posted By pyoungbl
Bob, I can understand your thought process...if...

Bob, I can understand your thought process...if you have not personally experienced the problem it is suspect. With that said, I have personally experienced the effect of running super rich due to...
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