Honda Rebel Forum

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-   Engine, Carburetor, Fuel System & Exhaust (https://www.hondarebelforum.com/f76/)
-   -   Lets talk about a 1985 single carb. (https://www.hondarebelforum.com/f76/lets-talk-about-a-1985-single-carb-122855.html)

abispac 11-11-2019 11:43 PM

Lets talk about a 1985 single carb.
 
So i got me this old in bad shape 1985 honda rebel 250. You should it seen the carb, filled with grease and dirt in the outside, i could just imagine on the inside. So i took it to a mechanic and the moron only cleaned on the outside and charged me like he did the job. How did i knew that? i inspected the screws and the where still dirty as no screwdriver was inserted in them. Plus gas was comming out red from the mud that the carb had inside. Anyway. I was having problems with my bike, unresponsive, shaky, and so on, so yesterday i opened the carb following the tutorials.So freking easy that i cant believe that moron didnt do the job.I had a hard time with the main screws, but once i loosed them the rest was easy. Cleaned the carb as per instruction per my deceased dad in the past, with tons of dish soap and hot water, then gasoline, then soap and hot water again , now all clean. So i put the whole thing together and still had some problems.I went today with a different mechanic who found that my Choke, didn't had a spring inside to keep it in place So it was injecting way to mach gas.(im building a bobber so i removed the choke cable and place the metal part inside without the spring to keep it in place). He added a spring to it, and voala, bike its back to riding. So anyway i got 2 questions. If the jets inside the carb are well snugged, and the main air jet its at 2 1/4 -2 3/4, thats all the carb needs in order to function well? (of course besides the choke). I know theres a black knob on the outside to make it faster o slower at iddle. So between those 2 its all? Any bobber users here? How many turns would you recommend for the main air jet if im not using the stock air filter, but one in the engine and one in the carb... thanks for any help, and advises or talks.

abnormalspring 11-12-2019 10:30 AM

If you are using a pod filter I believe you will have to rejet the carb. I know you do for different exhaust and the pod filter.

abispac 11-12-2019 11:30 AM

Quote:

Originally Posted by abnormalspring (Post 1245237)
If you are using a pod filter I believe you will have to rejet the carb. I know you do for different exhaust and the pod filter.

EDIT:I did a bit of reading and seems that first i need to find out wich brand of carb i have so i can order the correct jets, i would like to try some #48/#148 but im not sure where to buy them, any advice?
reject how? more turns on the main air jet?
if not,how then?

abnormalspring 11-12-2019 11:33 AM

Quote:

Originally Posted by abispac (Post 1245247)
Quote:

Originally Posted by abnormalspring (Post 1245237)
If you are using a pod filter I believe you will have to rejet the carb. I know you do for different exhaust and the pod filter.

reject how? more turns on the main air jet?
if not,how then?

You will have to get larger carburetor jets to account for the increase in airflow. Several members have already done it and if you plan to I am sure they will chime in with the jets they used.

abispac 11-12-2019 02:54 PM

I did a bit of reading and seems that first i need to find out wich brand of carb i have so i can order the correct jets, i would like to try some #48/#148 but im not sure where to buy them, any advice?

flitecontrol 11-12-2019 11:00 PM

Unless a PO (previous owner) installed a different carb, all Rebel carbs are Keihin brand. You will need jets that fit a Keihin.

abispac 11-13-2019 02:01 AM

Quote:

Originally Posted by flitecontrol (Post 1245277)
Unless a PO (previous owner) installed a different carb, all Rebel carbs are Keihin brand. You will need jets that fit a Keihin.

thank you sir.

abispac 11-14-2019 06:35 PM

Ive been reading alot , and it looks like #48 #148 gives the best result, hope someone gives more advice, ill see if i can get enough money this month to buy a rebuild kit with some better jets. This guy in youtube made a cheaper carb work on his rebel. Im a look more on that subject.


flitecontrol 11-20-2019 11:00 PM

Mileage varies between bikes and with speed. Best mileage is achieved in the 35-45 mph range. My best mileage on one tank of gas was 87. Worst was around 60 at WOT on the interstate. Never heard of anyone disabling the accelerator pump and improving performance, but suppose almost anything is possible. Was your improved performance confirmed via dynamometer or just the "butt dyno"? The two aren't necessarily equally accurate.


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