Air Cleaner for '91 Evo
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Road Master
Joined: Nov 2013
Posts: 1,216
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From: Buford, GA
Air Cleaner for '91 Evo
My Softail still has the stock air cleaner and backing plate. I'm wanting to upograde the air cleaner, but still keep the stock cover. Looking at S&S or Arlen Ness I'm not seeing an Evo upgrade option for a '91, only '93 to '99. Does anyone know if the '93 to '99 units will fit a '91 FLSTC?
Also opinions on Arlen Ness vs S&S.
Thanks,
Tony
Also opinions on Arlen Ness vs S&S.
Thanks,
Tony
Seasoned HDF Member
Joined: Nov 2006
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From: la la land jerzey
a 1991 motor is a bottom breather - in 92 they went to top ( AT THE HEADS ) breather now you can use the later on the early bike , but we have made spacers for the larger holes in the attachment to the heads as needed -- jz
Road Master
Joined: Jan 2008
Posts: 1,187
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From: Montgomery, AL
How about a fresh high flow filter and a new cover for yours? As said above you would just need to change the bolts on the Ness Big sucker. It comes with 2 bigger breather bolts for the newer heads that you'd swap to the bolt size that matches the threads in your heads. You probably would need some washers to seal the bolts up.
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Road Master
Joined: Nov 2013
Posts: 1,216
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From: Buford, GA
Thanks for the replies. I'd like to keep the stock cover if possible, upgrade the filter and change out the backing plate to be able to use a thumb screw for easier carb adjustment.
Club Member
Joined: Jun 2007
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From: Bedford UK
Your original back-plate was a plastic moulding which enclosed the filter element, is that what you still have? I'm pretty sure a #29543-99B can be made to fit with a little effort. The top breathing engines simply adapted the original filter mounting bolts and turned them into hollow screws. The holes in the mounting bracket may be too big, but that shouldn't present too much of a challenge to an Evo owner!
Tourer
Joined: Jun 2013
Posts: 272
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From: pomgolia
abrieviating the plastic backing plate with a hacksaw and perforating it with large holes usually allows it to pass more air
however personally I'd fit an S&S style aircleaner, they flow nicely and are just a better engineered bit of kit than the factory aircleaner
however personally I'd fit an S&S style aircleaner, they flow nicely and are just a better engineered bit of kit than the factory aircleaner
Road Master
Joined: Jan 2012
Posts: 856
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From: North Carolina
I have the Screaming Eagle backing plate with the K&N filter. Mine is a bottom breather so I just used bolts and spacers to mount it. They are all over ebay. Somerthing like this:
http://www.ebay.com/itm/Harley-David...8c1429&vxp=mtr
http://www.ebay.com/itm/Harley-David...8c1429&vxp=mtr
Last edited by falconbrother; Jan 22, 2014 at 09:27 AM.
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Thread Starter
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Road Master
Joined: Nov 2013
Posts: 1,216
Likes: 286
From: Buford, GA
Your original back-plate was a plastic moulding which enclosed the filter element, is that what you still have? I'm pretty sure a #29543-99B can be made to fit with a little effort. The top breathing engines simply adapted the original filter mounting bolts and turned them into hollow screws. The holes in the mounting bracket may be too big, but that shouldn't present too much of a challenge to an Evo owner!
Thanks,
Tony
Road Master
Joined: Jan 2008
Posts: 1,187
Likes: 8
From: Montgomery, AL
What size thread are the bolts in the heads? I believe they are smaller in the nonhead breather heads. So yes you'd have to get different mount bolts. My 92 has top breather heads, but it is still a bottom breather motor. But I still have been running the head breathers to the bottom of the carb. I'm about to pull the trigger on the Big Sucker kit myself. Nice scooter.