The Tan, Black Stripe wire and the Yellow Stripe (2 wire connector)
That is the Carburetor Bowl Heater Element. You really do not need that. The FCR carbs don't have them so don't worry about it, however they put them on the OEM carbs because for the Colder Clements it's to keep the carburetor warm because the gasoline vaporizes better when it's a little warm.
So to answer the question for that one you really don't need it for the FCR. You will just now have an empty plug under the seat.
The three wire with a green, green yellow stripe, and tan (3 Wire connector)
Those are for the Throttle Position Sensor. Some will say you don't need a TP Sensor... Me personally I WOULD recommend getting one because it changes your Ignition Timing through out the RPM Range... I mean Honda and all other manufactures did not design that for no reason... Yes it will run fine with no TP sensor but like I said better to run one in my opinion, just it will give a little better Throttle Response with it. Just look on eBay for a used TP sensor for a 2006 or newer TRX450ER, it will fit most FCR Carbs and plug right into the OEM plug under the seat. Just will need the Owners Manual to set the Throttle Position Sensor to a certain Resistance. I can get you that spec if you need it. To remove the Yamaha Style one just use a T8 or T10 Torx. Sometimes they're Security Torx. Some guys say you can just cut the wires and wire it to the Honda Connector but... the thing is that the TP sensor for the Yamaha and the Honda have totally different resistance values and will not function how it should because the CDI/ECU is not getting the right reading.
Where to find a FCR Carburetor Adapter
If you go to AZ Quad Parts Website (or just do a search on eBay) "FCR adaptor trx450r" should be the first one that pops up. Anyways he makes the adapters and sells them for $65.00.
The Hose Routing
They don't have a special routing other then it's just venting mainly and they just need to point down to keep water and Moister from trickling down" into the carburetor.
Also Yes that definitely is a YFZ450 (Or a Yamaha style FCR) Carburetor, you can always tell by the Grey Triangle Shaped Plug.
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Last edited by Ryan94Wright; 06-21-2019 at 01:43 AM.