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TOPIC: Carb heater and fuel pump? What for? Forum Tools Post New Topic Show latest posts Rules

#136680 Ipaintgrt (User) Fresh Boarder Posts: 66 Carb heater and fuel pump? What for? 3 Years, 6 Months ago   Hello, I'm new to the RS forums but there is allot of great info. I have completely redone my bike, and I'm in the wiring stage. I'm confused on why roadstars have electric fuel pumps, non fuel injected models, and what is the carb heater for and what would I connect it too on the wiring harness? I have a wiring diagram but it isn't very specific. Thanks for any help.   Logged     The administrator has disabled public write access. #136682 Cougar (User) Platinum Boarder Posts: 3210 Re:Carb heater and fuel pump? What for? 3 Years, 6 Months ago   Ipaintgrt wrote: Hello, I have completely redone my bike, and I'm in the wiring stage. I'm confused on why roadstars have electric fuel pumps, non fuel injected models, and what is the carb heater for and what would I connect it too on the wiring harness? I have a wiring diagram but it isn't very specific. Thanks for any help. The pump is electric because the carb bowl is very small on the stock cv40 carb so gravity feed can not keep the bowl feed without making other modifications .You say you redid your bike and are on the wiring does this mean you have new wires or are the old wiring harnesses in place because originally the connections were made on the bottom of the carb from the same harness that runs from the fuse box up to around the area on the backbone of the bike near the fuel pump where the connector to the harness leading to the carb heater there are 2 wires 1black and 1yellow&black and it ran along the carb feed lines under the manifold to the carb...Coug   Logged     Last Edit: 2008/11/06 14:26 By Cougar.     The administrator has disabled public write access. #136686 Ipaintgrt (User) Fresh Boarder Posts: 66 Re:Carb heater and fuel pump? What for? 3 Years, 6 Months ago   I bought an aftermarket wiring harness, but I didn't remove the wiring from the carb. I remove everything just by unhooking the connections and didn't cut anything in case I needed part of it. So the carb heat wiring is in tact to the point where the connector is. Does the carb heat just need to be hooked to an electrical source? thanks   Logged     The administrator has disabled public write access. #136702 Cougar (User) Platinum Boarder Posts: 3210 Re:Carb heater and fuel pump? What for? 3 Years, 6 Months ago   Reread my last post I changed the wording hopefully it is better the heater circuit runs from the ignition switch on to the heater fuse that is the 2nd from the left in the box under the seat it is a 10 amp fuse and from there it runs to the carb heater thermo switch to the carb heater under the carb..hope this helps...yes it needs an electrical source to answer your last question wiring sucks at least you are not looking for a short....yet ..Coug Also the heater is there to heat the gas going into the carb if I understand it correctly.   Logged       The administrator has disabled public write access. #136719 DocShadow (Admin) Hmmmm .... send beer Admin Posts: 17615 Re:Carb heater and fuel pump? What for? 3 Years, 6 Months ago   Cougar wrote: Also the heater is there to heat the gas going into the carb if I understand it correctly. Not quite ... it slightly heats the carb so that ice does not form as a result of the gas cooling the carb when it passes through the venturi. Doc   Logged     My Bike Website   The administrator has disabled public write access. #136720 jvcexc (User) Expert Boarder Posts: 477 Re:Carb heater and fuel pump? What for? 3 Years, 6 Months ago   Ipaintgrt, Doc and Coug can correct me if I am wrong, but I think you can leave the heater disconnected with not too many ill effects. If you ride in the cool humid weather or winter riding, youcould have and iceing problem, but, under normal riding, no prob. John   Logged       The administrator has disabled public write access. #136721 Ipaintgrt (User) Fresh Boarder Posts: 66 Re:Carb heater and fuel pump? What for? 3 Years, 6 Months ago   Thanks guys, that is very helpful. I have a buddy helping me with the wiring and he is used to Harleys so when he saw the carb heater, and electric fuel pump he was asking me some questions about them and I really didn't know the correct answers. Thanks again, Scott   Logged     The administrator has disabled public write access. #136725 Clifford (User) Platinum Boarder Posts: 1781 Re:Carb heater and fuel pump? What for? 3 Years, 6 Months ago   The carb heater has its own fuse, there is a black & yellow wire from that fuse to a thermal switch then to the heater element on the carb. The heater is not at all necessary? On my own bike I have removed the heater element from the carb and the wire isn't hooked to anything. Runs like a charm! The carb has a relatively small float valve and needs a pump to push enough fuel through it at high power. It can be eliminated by installing a larger valve. Clifford   Logged     The administrator has disabled public write access. #136850 Lakecharles (User) Jeremiah 29:11 and Semper Fi! Gold Boarder Posts: 745 Re:Carb heater and fuel pump? What for? 3 Years, 6 Months ago   Clifford.... is the carb heater working to "heat" fuel even on hot July days? If that is true, it seems that it would help to enable "puking." True? Maybe I would be well served to pull the fuse on it... what do you think? Thanks   Logged       The administrator has disabled public write access. #136855 Cougar (User) Platinum Boarder Posts: 3210 Re:Carb heater and fuel pump? What for? 3 Years, 6 Months ago   Lakecharles wrote: Clifford.... is the carb heater working to "heat" fuel even on hot July days? If that is true, it seems that it would help to enable "puking." True? Maybe I would be well served to pull the fuse on it... what do you think? Thanks If my carb were puking I would pull the fuse to the heater ....you can always put it back if you have icing problems....Coug   Logged       The administrator has disabled public write access.

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