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Cruisers - America, Speedmaster Cruiser chat for America and Speedmasters

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Old 10-24-2012, 07:49 PM   #1 (permalink)
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Norman Hyde bell mouth install possible dilemma

I have a 2009 Speed master thinking of installing Norman Hyde bell mouth except I noticed after snorkel removal the cap has a plug going onto it that is not on the Norman Hyde Bell mouth I do not know what this plug is for it plugs into the slat below my thumb in pic.
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Old 10-25-2012, 12:25 AM   #2 (permalink)
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Quote:
Originally Posted by Mark Smith View Post
I do not know what this plug is for it plugs into the slat below my thumb in pic.
That is your OBD II port, to connect to your motorcycles ECU. Stored on the perch molded into the air inlet. If you loose the perch you can loosely strap the cable/connector down to the frame for storage.

edit: I just removed the snorkel and enlarged the inlet to the ID of the filter. Done with some other work and dyno-tuned with added air flow. Sure, it's a bit crude compared to a bell mouth or a the new "breathe" inlet (looks really interesting).
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Last edited by MattyMo; 10-25-2012 at 07:10 AM. Reason: added thought
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Old 10-25-2012, 02:41 PM   #3 (permalink)
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Ive read that without the bellmouth the air rumbles to much into the airbox did you experience this. I am also now considering just pulling the snorkel out and putting the Polaris snowmoble bellmouth in instead many people here seem to think it gets the same effect as the Norman Hyde one.
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Old 10-25-2012, 03:51 PM   #4 (permalink)
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you can find a visual comparison between the polaris one and the "breathe" one below:


i'm pretty sure the "breathe" (why is it ALWAYS in quotes?) is slightly larger than the norman hyde unit. get more info about it here.

EDIT: a google image search for norman hyde bellmouth shows that the unit looks pretty restrictive (about the same as the polaris unit). if you don't want to eliminate the airbox altogether, the "breathe" unit is definitely the way to go. otherwise, i doubt the norman hyde is much better than the polaris. see?


Last edited by steve0suprem0; 10-25-2012 at 03:55 PM.
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Old 10-25-2012, 04:19 PM   #5 (permalink)
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Yes I see the differnce. "Breath" does it fit the Speedmaster there website shows it is only for Bonnevilles and all it's sister bikes that breathe from the side under the cover. America and Speedmaster are under the seat. Does any one know for sure it fits on our cruiser america /speedmasters.
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Old 10-25-2012, 04:23 PM   #6 (permalink)
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Just noticed you own a Speedmaster Steve0Suprem0. So how do you like the "Breathe" and where did you put the large obd II plug.
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Old 10-25-2012, 05:26 PM   #7 (permalink)
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i don't actually have it, but that link i posted shows one installed in a cruiser. as far as the obd-ii plug, i haven't got one of those either since i'm carbbed. if it were me, though, i'd use my answer to everything: zip-ties.
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Old 11-08-2012, 10:58 PM   #8 (permalink)
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OK I went with the Polaris Bell Mouth fits easy enough a little cramped in there with the plastic cover on left and the plug housing on right. Changes the shape a little bit though.
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Last edited by SpeedBirdTT; 11-08-2012 at 11:35 PM. Reason: add pic
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Old 03-17-2014, 01:16 AM   #9 (permalink)
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SpeedBird, Where did you purchase the Polaris BellMouth from? Are you running a stock or aftermarket airfilter? Did you notice any performance or operational changes after pulling the stock snorkel and installing the bellmouth?

Quote:
Originally Posted by SpeedBirdTT View Post
OK I went with the Polaris Bell Mouth fits easy enough a little cramped in there with the plastic cover on left and the plug housing on right. Changes the shape a little bit though.
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Old 03-19-2014, 07:44 PM   #10 (permalink)
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I ordered it at Ronnie's mail order.com. I am running TOR'S long slash cut and a K & N air filter. It does make the engine a bit more throaty due to more than twice the airflow other than that no big change.
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