Best Air Cleaner Recommendations?
- Thread starter La Rana
- Start date
Welcome from Kansas. Your best bet for performance will be the stock aircleaner. Other stuff looks cool but not so great performance wise. Check to see if the bowl vent screw has been removed. (14) If not, remove it. Stock will need the screw replaced.
Also check it the rubber caps are still on the top of the carb.
Thanks HMAN. I read about the float screw (14) on this site so I removed it but it still doesn't run right. I noticed the rubber boot for the fuel pump(?) rod on top was broken. Really didn't think anything of it. I'll replace it!
Like Rottweiler said, check or just replace the 2 rubber caps on top of the carb. They will dry rot suck air n make the bike run like crap. Or do as John Sachs suggests.
mleach72
Well-Known Member
That is part of breather system on the 4 1/8" bore engines. They are vacuum breathers. The front hose goes from the manifold to the front head. That puts a vacuum in the rocker boxes and engine block. The rear breather line goes from the rear head to the air cleaner. It should have a one way check valve in it. That valve closes as soon as the engine starts and produces vacuum. If they look cracked, it's a good idea to replace them.
The first thing I would do is replace the dry rotted rubber. The spike air cleaner is a little restrictive but it shouldn’t cause it to run bad. If you want a better one use the stock one or try and find a S&S dual runner. Best for air flow but you need to upgrade the exhaust. Does no good to get more air in if you don’t get more air out
That is exactly what I have and with the check valve! Is there a need to pull that off sometime and make sure the check valve is not sticking or something that would indicate I should watch for? Thanks
mleach72
Well-Known Member
They usually don't go bad. If you are concerned, you can pull the valve out and check it. You should be able to blow through it one way, but not the other way. Make sure it is in the correct direction. The valve will let pressure out of the engine, but won't allow air into the engine.
Thanks! It has Vance and Hines pipes and they are pretty loud. Don't see any baffles unless they placed them at the joint? I am going to ask the previous owner if he has the original air cleaner or if it came with the spike (he was second owner). I also have this dual snorkel with a K&N filter I may look at some day but the long tube dual runners look sweet. Reminds me of the high rise intakes for cars that were torque adders.
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Perfect, thanks!!
SCC007
Active Member
Exhaust baffles are in the back closest to the exit so if you can’t see or feel them, likely gone…this might not be a popular statement but I think the bikes run better and are easier to tune with baffles in…just my .02c
My bike only had one baffle in it and it was a pain in the ass to tune and get right. Got a set of big city thunders and it tuned great and I think sounds much better (less pingy).
My bike only had one baffle in it and it was a pain in the ass to tune and get right. Got a set of big city thunders and it tuned great and I think sounds much better (less pingy).
Big City Thunder
Performance Baffles for motorcycles. Harley Davidson, Indian, Honda, and more. Screamin' Eagle II Mufflers. Get more torque and power from your bike with a premium sound quality. Thunder Monster baffles get the heads turning to see what you're riding.
bigcitythunder.com
john sachs
Well-Known Member
Best I've found is the groved teardrop air cleaner cover, with an extra wide element. Proven many times on the dyno. 
Best I've found is the groved teardrop air cleaner cover, with an extra wide element. Proven many times on the dyno.
