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Forum: Zongshen RX3 06-12-2016, 12:48 PM
Replies: 212
Views: 37,837
Posted By detours
In the unofficial position, mine takes 45 to 50...

In the unofficial position, mine takes 45 to 50 miles to fill.
Forum: Zongshen RX3 04-25-2016, 03:14 PM
Replies: 212
Views: 37,837
Posted By detours
Yeah, I definitely collect more at high RPMs. But...

Yeah, I definitely collect more at high RPMs. But that's still less fuel in the overflow than you're seeing ... about half a tube after my 40 mile commute.

I was hoping the new engine would...
Forum: Zongshen RX3 12-30-2015, 11:03 PM
Replies: 212
Views: 37,837
Posted By detours
The filter is porous, open cell foam. Maybe...

The filter is porous, open cell foam. Maybe that's what Gerry meant by 'sponge'. It is shaped like an opened ended cylinder or cup. In my testing, I found that less fuel was collected in the tube...
Forum: Zongshen RX3 10-13-2015, 09:56 PM
Replies: 212
Views: 37,837
Posted By detours
I followed the PCV hoses and found that the...

I followed the PCV hoses and found that the crankcase vapors enter the airbox below the filter, so they are actually unfiltered except by the small filter inside the separator.

By flipping the...
Forum: Zongshen RX3 10-13-2015, 04:43 PM
Replies: 212
Views: 37,837
Posted By detours
Actually, now I'm thinking mine was installed...

Actually, now I'm thinking mine was installed upside down at the factory, and my replacement was shipped with the hoses attached wrong.

Here's a pic from the CSC blog...
Forum: Zongshen RX3 10-13-2015, 04:24 PM
Replies: 212
Views: 37,837
Posted By detours
The white dot on both my separators is at the...

The white dot on both my separators is at the level of the crankcase hose. As originally installed, the white dot faced the engine. Now it faces away from the engine. You can barely see the white dot...
Forum: Zongshen RX3 10-13-2015, 01:07 PM
Replies: 212
Views: 37,837
Posted By detours
I found a partial solution to fuel condensation...

I found a partial solution to fuel condensation in the catch tube. Turn the PCV separator upside down!

I was thinking about my last test and realized that if cutting a hole in the filter wall...
Forum: Zongshen RX3 10-11-2015, 12:30 PM
Replies: 212
Views: 37,837
Posted By detours
Had to take a break from riding cause I got the...

Had to take a break from riding cause I got the flu, but after a few rides it became obvious that drilling out the filter actually made the problem worse. I collected about twice as much liquid in...
Forum: Zongshen RX3 09-28-2015, 01:18 PM
Replies: 212
Views: 37,837
Posted By detours
Interesting. I hadn't thought about condensation...

Interesting. I hadn't thought about condensation effects from low pressure.

With the stock (undrilled) filter, I wonder if filter saturation from fuel causes an additional pressure drop from the...
Forum: Zongshen RX3 09-28-2015, 01:03 PM
Replies: 212
Views: 37,837
Posted By detours
No, the cap is fused onto the bottle after filter...

No, the cap is fused onto the bottle after filter installation and is not removable. My phone camera has a macro setting and I took my pics through each end of the separator.
Forum: Zongshen RX3 09-27-2015, 09:57 PM
Replies: 212
Views: 37,837
Posted By detours
My thinking is that the filter gets saturated...

My thinking is that the filter gets saturated with fuel and can't easily pass vapor any more. So I decided to drill a small hole on the crankcase side of the oil separator.

My hope is that all of...
Forum: Zongshen RX3 09-27-2015, 09:37 PM
Replies: 212
Views: 37,837
Posted By detours
Here's a view of the side and bottom of the PCV...

Here's a view of the side and bottom of the PCV oil separator. All crankcase gases hit the side of the filter. There is no bypass for oil or heavy contaminants.
Forum: Zongshen RX3 09-27-2015, 09:26 PM
Replies: 212
Views: 37,837
Posted By detours
I was able to examine the PCV oil separator today...

I was able to examine the PCV oil separator today and I think I can see why fuel is collecting in the catch tube.

The oil separator contains a cylindrical, open-topped filter shaped like a cup....
Forum: Zongshen RX3 09-21-2015, 09:17 PM
Replies: 212
Views: 37,837
Posted By detours
Luckily, no. I changed my oil a couple of weeks...

Luckily, no. I changed my oil a couple of weeks ago at 2000 miles, which is after I noticed fuel collecting in that tube. The oil looked normal, definitely not any thinner than oil changes on other...
Forum: Zongshen RX3 09-21-2015, 02:23 AM
Replies: 212
Views: 37,837
Posted By detours
No, I can see how to disconnect it, but I'm not...

No, I can see how to disconnect it, but I'm not sure what to look for when I get it off.
Forum: Zongshen RX3 09-21-2015, 01:05 AM
Replies: 212
Views: 37,837
Posted By detours
Yes, when we got back from our 4-hour ride...

Yes, when we got back from our 4-hour ride yesterday, the catch tube was full. I dumped it all into this can and it burned like you see.
Forum: Zongshen RX3 09-21-2015, 12:16 AM
Replies: 212
Views: 37,837
Posted By detours
If you like the pic, check out the video :) ...

If you like the pic, check out the video :)

https://drive.google.com/file/d/1ZXRHpfYJ6rDbcayy5YoTw8XFJdp42vNOWg/view?usp=sharing
Forum: Zongshen RX3 09-20-2015, 04:42 PM
Replies: 212
Views: 37,837
Posted By detours
I definitely see more fuel collecting after long,...

I definitely see more fuel collecting after long, high RPM runs. When I finished our 4 hour ride to Estes Park yesterday, the tube was full to the top. I think some fuel collects all the time and...
Forum: Zongshen RX3 09-20-2015, 01:58 PM
Replies: 212
Views: 37,837
Posted By detours
Here's a pic of the liquid burning. I have no...

Here's a pic of the liquid burning. I have no doubt it's gasoline, whatever other contaminants may exist in it. The liquid is clear amber, not milky, with no sediment or particulates.

I still...
Forum: Zongshen RX3 09-11-2015, 01:46 PM
Replies: 212
Views: 37,837
Posted By detours
So I'm still getting a lot of gas in that tube....

So I'm still getting a lot of gas in that tube. The plug doesn't seal very well, but it still gets full despite dripping out. And whatever contaminants are in there, the liquid looks and smells just...
Forum: Zongshen RX3 08-23-2015, 10:54 AM
Replies: 212
Views: 37,837
Posted By detours
Thanks for the idea, nova. I'll check the airbox...

Thanks for the idea, nova. I'll check the airbox vent line.
Forum: Zongshen RX3 08-23-2015, 09:51 AM
Replies: 212
Views: 37,837
Posted By detours
On my long ride through Poudre Canyon yesterday,...

On my long ride through Poudre Canyon yesterday, my drain tube filled up and leaked at every stop. It smells very strongly of gasoline and looks like gas too.

It was always dry till I adjusted my...
Forum: Zongshen RX3 07-18-2015, 02:22 AM
Replies: 212
Views: 37,837
Posted By detours
Thank you for that excellent description of how...

Thank you for that excellent description of how our PCV system works. :thanks:
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