Excessive blow-by? - Victory Forums - Victory Motorcycle Forum
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post #1 of 7 (permalink) Old 12-09-2013, 05:02 PM Thread Starter
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Default Excessive blow-by?

Ok, so about 9k miles into my XCT bike now and I'm still seeing the same thing. And I'm not liking it.

Every couple weeks I found a few drops of oil on the left side of the case cover. Didn't think much of it at first figuring it was road deposited but not from me. But as it grew I found that it was dripping from the ignition V cover.

Pulling off the plastic cover revealed a nice deposit of oil on the back side in the 'cup' of it. And more as I dud deeper. Tracing it a bit more I found a nice wet finger full on top of the coil pack. Some brake cleaner and washing later it's gone. But as you may have guessed.... it returns in a slower manner as I wipe it away more often. By now it's made a gooey mess of the wiring tape and such and I've cleaned it up about 4 good times thus far.

I know where it's coming from: crank case vent. There's not much doubt about that as I see it around the fittings under the backbone and tank area. I'd pull the tank but not ready to go there given the hassle of properly putting it back on...The bigger issue to me is "why it's happening". My sinking feeling is that it's crank case pressure caused by poorly seated rings. With about 5k miles on it as a dealer rental who knows how (or maybe we do) it was treated new.

Thoughts or suggestions? Links to similar tales? (I searched)

The Blue Tuna
2013 XCT
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post #2 of 7 (permalink) Old 12-09-2013, 06:36 PM
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This may seem way too simple but is your oil level high. Are you checking it warm and with the bike vertical. I know it's all in the book but you'd be surprised how many folks check the oil level on the side stand.

As far as the gooey mess on the tape, it may be the brake parts cleaner. That product really cuts through stuff.

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post #3 of 7 (permalink) Old 12-09-2013, 06:39 PM
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I have $24,000 miles on my Cross Roads and 56,000 on my Kingpin and have no problems with blowby. I would take it to the dealer and document the issue. Have them check it out and see what they say.

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post #4 of 7 (permalink) Old 12-09-2013, 06:53 PM
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I had the same thing happen to me after my 500 mile check up ,make sure the vent tube is pushed on all the way, mine wasn't on all the way after the dealer did the service. I pushed it on and a few ties later and no more issues. Like Creek said check your oil level also .

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Last edited by dentdave; 12-09-2013 at 06:56 PM.
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post #5 of 7 (permalink) Old 12-10-2013, 07:47 AM Thread Starter
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Thanks but yes, I'm pretty confident it's not related to over filling. The first time it came to light in fact was after the dealer changed oil in it due to a leaking side cover. After that it's been fairly constant.

For grins I may run a compression test on it and see what I see.

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post #6 of 7 (permalink) Old 12-10-2013, 12:24 PM
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If you are sure it is coming from the crankcase vent tube then do a relocation (shortening). Cut the tube down and put a K&N filter on it. Its a really simple procedure and it keeps you from getting goop into you air box, or in your case all over if its not tucked all the way up. There is at least one picture of it on this website. I'm sure you could find it with a search and a bit of patience.

If your heads are actually weeping then you may be one of the unlucky few who received a faulty head casting.

Crankcase vent--

I did a very similar modification to my ZRX when I eliminated my airbox and went to pod filters.

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Last edited by Garion12; 12-10-2013 at 12:34 PM. Reason: Added reference website
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post #7 of 7 (permalink) Old 12-10-2013, 12:31 PM Thread Starter
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Thanks for that suggestion. Yeah I'm sure of where it's coming from; the backbone is damp all around the rubber seal of the intake manifold. The hardline to the 90 and into the air box is all tight. I'm certain the inside of the air box will be messy...no way around that one.

I'll swing by the dealer in Mesa with it one day and get some input on it and cost for changing out the filter etc in due time. Got nearly 15k total on it so I'm sure it could use one. We'll talk about the filter idea at that time also.

Tried to do the comp test but found my fittings are too large for the smaller bike thread holes. Doh!

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