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May 25, 2013, 5:50pm

ScootDawg Scooter Forum :: The Garage :: 50cc Scooters and up.... :: Replacing an EGR head with a non-EGR head.

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Topic: Replacing an EGR head with a non-EGR head. (Read 656 times)

erictheviking666
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Replacing an EGR head with a non-EGR head.
« Thread Started on Oct 10, 2010, 10:12pm »

As the title states I just replaced my head and the new one is non-EGR. I haven't started it yet because I'm waiting on the bigger jets for the carb, (also did 72cc BBK) so I was wondering.... Since the little EGR tube on the front of the valve cover no longer bolts to the flange on the head, do I need to block that tube off? Will it suck air back through that tube and cause a negative pressure issue in the crankcase? Anybody ever do this before and just leave the tube unattached? I will eventually order a non-EGR valve cover, but this project has depleted all my cash for the time being so I can't order a new one yet.

« Last Edit: Oct 10, 2010, 10:13pm by erictheviking666 »

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D-cat
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Re: Replacing an EGR head with a non-EGR head.
« Reply #1 on Oct 10, 2010, 10:36pm »

I have not done this (my bike has never had EGR), but having read how the EGR is supposed to be hooked up, you do want to plug/cap the disconnected tube(s) or you'll suffer a vacuum issue.

Don't confuse the EGR system with the valve cover vent; that still wants to be hooked up to the airbox intake, or a catch canister if you have replaced the airbox with high-flow.

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indy50
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Re: Replacing an EGR head with a non-EGR head.
« Reply #2 on Oct 10, 2010, 11:35pm »

Eric... if your nw head looks like this
[image]

then dont worry about blokin anything, you can remove the egr pipe etc & use the cover, just get a non egr cover when u can

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erictheviking666
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Re: Replacing an EGR head with a non-EGR head.
« Reply #3 on Oct 11, 2010, 12:58am »

Cool thanks, I'll try that.

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scootercapecod
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Re: Replacing an EGR head with a non-EGR head.
« Reply #4 on Oct 12, 2010, 12:07pm »

When I did the Hoca Performance head it was non EGR and the original was EGR. No trouble with it for almost 1000 clicks on the chinameter.

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Re: Replacing an EGR head with a non-EGR head.
« Reply #5 on Oct 12, 2010, 1:55pm »

I replace egr heads with non egr heads with no issues. Just make sure you plug the vacuum source to the canister.

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erictheviking666
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Re: Replacing an EGR head with a non-EGR head.
« Reply #6 on Oct 12, 2010, 2:02pm »

Fired it up today before work. I just cut the tube, pinched it off, and JB welded it, problem solved. Thanks!!

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