Moflow Air Kit Question
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Cruiser
Joined: Jul 2010
Posts: 203
Likes: 3
From: Australia
Moflow Air Kit Question
Hello all,
So today I managed to get my hands on a MoFlow airkit and decided to swap out my Kury Corsair. The Corsair was starting to annoy me as it hits my leg.
The problem I had was that this MoFlow was not for a 2010 model and so it meant that I could not put the backing plate on and make the banjo bolts fit on the crank case.
SO... I removed the breather ports on the backing plate and left my external crack case breather in place. It means that I have to somehow blank the holes that run into the cleaner that should go to the crank case, as this model vents the crank case back into the filter
My question is... should I buy the right backing plate for my bike, or blank off the holes and keep my external crank case breather filter that I have up under the tank?
Does anyone know how these perform - If I can avoid it I don't want to to have to play with the TTS again.
Here are some before and after shots... let me know what you think...
This is the Corsair....
This is the MoFlow...
So today I managed to get my hands on a MoFlow airkit and decided to swap out my Kury Corsair. The Corsair was starting to annoy me as it hits my leg.
The problem I had was that this MoFlow was not for a 2010 model and so it meant that I could not put the backing plate on and make the banjo bolts fit on the crank case.
SO... I removed the breather ports on the backing plate and left my external crack case breather in place. It means that I have to somehow blank the holes that run into the cleaner that should go to the crank case, as this model vents the crank case back into the filter
My question is... should I buy the right backing plate for my bike, or blank off the holes and keep my external crank case breather filter that I have up under the tank?
Does anyone know how these perform - If I can avoid it I don't want to to have to play with the TTS again.
Here are some before and after shots... let me know what you think...
This is the Corsair....
This is the MoFlow...
May our Moderator Rest in Peace
Joined: Sep 2006
Posts: 11,386
Likes: 35
From: Rochester, NY
All late model Harley's vent through the air cleaner from the factory.
But if you already have it rerouted to an external filter and your tune was done with it that way.
You should be fine just blocking off the holes in the backing plate.
I can't imagine any stage 1 intake making any more than minor differences in the volume of air it's letting in.
But if it shows ANY, and I do mean ANY, sign of tending to run either lean or rich, don't screw around, get it retuned right away.
If you do either have to or want to get it retuned.
I would at least consider getting hold of the right backing plate before you do.
But if you already have it rerouted to an external filter and your tune was done with it that way.
You should be fine just blocking off the holes in the backing plate.
I can't imagine any stage 1 intake making any more than minor differences in the volume of air it's letting in.
But if it shows ANY, and I do mean ANY, sign of tending to run either lean or rich, don't screw around, get it retuned right away.
If you do either have to or want to get it retuned.
I would at least consider getting hold of the right backing plate before you do.
Thread Starter
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Cruiser
Joined: Jul 2010
Posts: 203
Likes: 3
From: Australia
Thanks for the reply.
I tuned the bike myself, so its not a biggie if I need to redo it.
The only difference in the backing plate is that if I get the right one, it will route the crank case breather through the filter.
I had read that its better to keep the oil vapours out of the throttle body if possible - hence the Corsair with the external breather filter - but am just trying to get confirmation.
I tuned the bike myself, so its not a biggie if I need to redo it.
The only difference in the backing plate is that if I get the right one, it will route the crank case breather through the filter.
I had read that its better to keep the oil vapours out of the throttle body if possible - hence the Corsair with the external breather filter - but am just trying to get confirmation.
May our Moderator Rest in Peace
Joined: Sep 2006
Posts: 11,386
Likes: 35
From: Rochester, NY
Its true that keeping the vapors out is a good thing, but its not nearly as bad as it was in the days of Shovles and Panheads.
Twinkie motors are far cleaner than their ancestors were.
One thing you might want to consider is that if you want to keep the kind of external setup you have.
Think carefully about where your putting them because over time they will eventually start to drip oil over everything.
If your at all handy with tools I would suggest that you check out the "DIY for under Fifty BUX" thread that Mud has going over in the Dyna section.
There's a lot of stuff to wade through, but its indexed and they have come up with some really nice looking and inexpensive solutions you can make yourself.
Twinkie motors are far cleaner than their ancestors were.
One thing you might want to consider is that if you want to keep the kind of external setup you have.
Think carefully about where your putting them because over time they will eventually start to drip oil over everything.
If your at all handy with tools I would suggest that you check out the "DIY for under Fifty BUX" thread that Mud has going over in the Dyna section.
There's a lot of stuff to wade through, but its indexed and they have come up with some really nice looking and inexpensive solutions you can make yourself.
This could be late . As Far as moflow intakes the internal breather design is poor . When the filter get soak with oil . The oil will start drifting It's gonna be messy one .it looks good but . But I will never recommend it to any body good luck
Thread Starter
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Cruiser
Joined: Jul 2010
Posts: 203
Likes: 3
From: Australia
Thank mate. I have since blanked the MoFlow intake and I have kept the external crank case breather, so there is no oil going into the air intake now. 
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Thread Starter
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Cruiser
Joined: Jul 2010
Posts: 203
Likes: 3
From: Australia
FYI - Here is what I did
I made some blanking plates to fit the holes from the MoFlow's breather and mounted back on the bike.
This pic shows the backing plate where you can see the 4 mounting holes for the breather adapters, and the hole in the middle of each is the hole that would run to the crank case. This is the hole that would need to be blanked.
This pic shows the blanking plates that I made out of some light alloy.
Here is a pic of the blanking plates mounted with Nylock nuts and some Loctite. What you can't see is the rubber membraine under the plates that will add that extra bit of sealing.
And here it is back on the bike. You would never know they were there! My external breather is still in place under the tank (you can see the banjos on the crank case)
And finally mounted.
I made some blanking plates to fit the holes from the MoFlow's breather and mounted back on the bike.
This pic shows the backing plate where you can see the 4 mounting holes for the breather adapters, and the hole in the middle of each is the hole that would run to the crank case. This is the hole that would need to be blanked.
This pic shows the blanking plates that I made out of some light alloy.
Here is a pic of the blanking plates mounted with Nylock nuts and some Loctite. What you can't see is the rubber membraine under the plates that will add that extra bit of sealing.
And here it is back on the bike. You would never know they were there! My external breather is still in place under the tank (you can see the banjos on the crank case)
And finally mounted.
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