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05-10-2016, 11:49 PM | #46 | ||
Join Date: Jul 2008
Location: Idaho
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Obviously, you don't have anything to worry about by keeping the OCS in the current, 'unofficial' orientation. Indeed, I would't waste five minutes to flip it, unless you want to experiment. If you do decide to flip the OCS, you will probably bend the tubing more acutely, which will probably cause the tubing to crack and fail more quickly. I can't see any benefit resulting from flipping the OCS to the 'official' position.
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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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05-11-2016, 12:12 AM | #47 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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I have ridden my RX3 over 14,000 miles with my OCS in the 'unoffical' position. Every time I have changed my engine oil, the used oil was in excellent condition. Therefore, I'm sure I am collecting all the fuel and water contaminants from the engine oil. If you flip the OCS to the 'official' position, you will get more contaminants collected in the tube, which means less fuel vapor is being routed to the air box, and burned in the engine. Detours explains this matter in his usual intelligent, concise manner, in post #32 of this thread.
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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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05-15-2016, 11:39 PM | #48 |
Join Date: Nov 2014
Posts: 159
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So here is the solution I will be testing out. Every other motorcycle I've ever owned or that I'm aware of vent from the crankcase directly to the air box with out all this OCS stuff. With a simple mod this can be accomplished on the RX3. I'm sure this will have warranty voiding implications if something I don't for see cause an engine related failure; Joe I realize that up front since I'm sharing this here.
As of right now this is an experiment and I don't encourage anyone else to following suit. But the engineer in me can't leave well enough alone; I'll keep everyone posted. |
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05-16-2016, 02:58 AM | #49 | |
Join Date: Sep 2014
Location: Arvada, CO
Posts: 1,004
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And some potential disadvantages:
It's like a race ... Will the straight shot draw vapor into the airbox faster than it can condense and fall back into the crankcase? As you test this setup, check the catch tube under the airbox after each run. I'll be very curious if liquid makes it to the airbox and is trapped there.
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Red 5 standing by! 2015 CSC red RX3 with 19" front wheel, Shinko 804/805, skid plate, tall seat, 13T/45T sprockets, progressive shock, Winyoochanok windshield, GENSSI LED headlight, SW-Motech tankbag, Shorai Lithium battery 2014 Ural Patrol |
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05-16-2016, 05:15 AM | #50 | |
Join Date: Mar 2016
Location: Scotland
Posts: 21
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05-16-2016, 12:32 PM | #51 |
Join Date: Jan 2015
Location: England
Posts: 382
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In some performance car circles a separator is considered an enhancement, adding "catch cans" to their crankcase emissions system.
Apparently, oil vapour entering the combustion chamber can be detrimental to performance and fuel economy. Zongshen didn't have to add this separator to pass emission standards, a straight forward tube will do that. Blow-by gasses also contain acids that I guess wouldn't be good for the EFI sensors. Perhaps these are the reasons its been added. |
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05-16-2016, 01:19 PM | #52 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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However, I received my bike with an OCS in the "unofficial" position, and it ha been running very well for almost 15,000 miles, and averaging 68 mpg. Therefore, I don't see how keeping the OCS in the "unofficial" position can be detrimental to performance and economy. I wonder how other motorcycles with EFI vent the crankcase gasses?
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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 Last edited by SpudRider; 05-16-2016 at 01:51 PM. |
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05-16-2016, 01:36 PM | #53 |
Join Date: Sep 2015
Location: East Central Hellinois
Posts: 1,344
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I thought Joe's blog today was a fair and honest explanation of the mechanics of the issue and, for me at least, eases most of my concern of the 4 to 5% levels recently seen in the oil analysis. I'm still not certain it's a genuine constant across the board as everyone rides differently. I'm going to leave mine, when it arrives, in the correct orientation and will probably send a sample off to Blackstone at the 1000 mile mark for peace of mind - otherwise I'm gonna go with Joe's assurance and ride in peace. Might bump up to a heavier oil down the line but for the first 1000 I'll stick with the Mobil. What say the rest of you regarding Joe's blog ? ? ?
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05-16-2016, 02:10 PM | #54 |
Join Date: Feb 2016
Location: Portsmouth, Virginia, USA
Posts: 632
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Ducati, Triumph, Moto Guzzi, BMW...all vent to the airbox....at least all of mine did. EPA won't pass them if they vent to the atmosphere. Note that all of them are much larger displacement engines so the pumping action is more pronounced. Good venting is critical because otherwise you risk blowing oil seals in the engine.
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05-16-2016, 02:38 PM | #55 | |
Join Date: Jan 2015
Location: England
Posts: 382
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where a straight tube without the OCS will not and possibly have a detrimental effect on performance and economy. As to the orientation of the OCS, i have no idea |
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05-16-2016, 02:51 PM | #56 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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I assumed all bikes with EFI vent to the air box. All of my street legal bikes vent to the air box. Many dirt bikes vent to the atmosphere, but they don't need to pass EPA or DOT requirements. I am wondering if your previous EFI motorcycles employed an OCS, or if they vented directly to the air box without an OCS?
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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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05-16-2016, 02:53 PM | #57 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Quote:
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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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05-16-2016, 03:22 PM | #59 |
Join Date: Oct 2015
Location: White Mtns. NH
Posts: 488
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The new fuel injected Urals go direct into the air box just like the carb version
as you can see below. The carb version does get a lot of oil and condensation in the air box
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05-16-2016, 03:50 PM | #60 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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Almost all of the early EFI's fired a load of fuel every stroke, whether the intake valve was open or not. That "blank" spray of fuel would sit on the back of the intake valve and vaporize/atomize while it waited. This process also increased the intake valve build-up due to the olefins and diolefins in the fuel. Ford (in American cars) brought out the first "SEFI" system that only fired when the intake valve opened.
I've heard that many EFI's today still work firing a charge every stroke. I wonder if the EFI on the RX3 fires in this fashion, with the injector firing every stroke? This may possibly increase the fuel in the oil (or drain tube). Does anyone know the actual injector firing sequence? Just a thought......
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