40mpg - Honda Rebel Forum
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post #1 of 16 Old 12-10-2019, 03:27 AM Thread Starter
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40mpg

I have a 2012 rebel with 15,000 miles on it. I am only getting around 40 mpg. Can anyone tell me why? I'm having to refuel after 120 miles and that's with using my reserve
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post #2 of 16 Old 12-10-2019, 10:53 AM
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Welcome to the forum. How long have you had the bike, and is the poor fuel economy something new, or has it always been that way? There could be several things causing the problem; bad spark plugs, valves out of spec, a dirty carb, or possibly something else. Dirty carbs are the most frequently seen cause of poor engine performance.

Keepin' all the left over parts. Gonna use 'em to build another bike!

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post #3 of 16 Old 12-10-2019, 11:09 AM Thread Starter
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Ive had it about 6 months. It's been a problem since I got it. I changed the spark plugs and cleaned the carb when I got it. I was thinking there might be blockage in the fuel line.
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post #4 of 16 Old 12-10-2019, 11:37 AM
 
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Quote:
Originally Posted by Rebel250-1991 View Post
Ive had it about 6 months. It's been a problem since I got it. I changed the spark plugs and cleaned the carb when I got it. I was thinking there might be blockage in the fuel line.
Tell us more about how the bike performs. Are you able to cruise at highway speeds, or is it low on power, too?

In addition to what flightcontrol said, I would add checking the air filter to the list. Also, tire pressure, and chain condition.

But the valve adjustment that flightcontrol mentioned would be my best guess.

.

2016 Rebel 250 - - Black
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post #5 of 16 Old 12-10-2019, 11:47 AM
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Have you looked in the tank to see if there is any rust? Installing an inline fuel filter is a good way to ensure any contaminants in the tank don't reach the carb. Fuel line is cheap, and you could replace it when installing a fuel filter if you think it may be a problem. I like the clear filters so you can see anything the filter traps. You can check fuel flow by turning the petcock to the off position, disconnecting the fuel line at the carb and placing the end into a clean, clear container and turning the petcock to on. If there are visible contaminants in the container or it is rusty orange in color, the carb will definitely need to be thoroughly cleaned.

Here are some links for installing a filter and removing rust from the tank. https://www.hondarebelforum.com/f39/...ning-7168.html

https://www.hondarebelforum.com/f39/...ter-13278.html

How did you clean the carb? Soaking in carb cleaner followed by rinsing and blowing out every orifice with high pressure compressed air, or using carb spray? Spray isn't as effective as soaking.

Is the bike stock?

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
Putting your bike year and model in your signature helps others help you!
Here's how: https://www.hondarebelforum.com/f19/...re-121087.html
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post #6 of 16 Old 12-10-2019, 11:47 AM Thread Starter
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It has peak power. I can cruise at 65-70 mph until the tank is dry. I put new tires on it a month ago and check the pressure Everytime I ride (everyday). I have already checked the chain as well. I will try adjusting the valve and see if that helps. Thankyou for your help.
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post #7 of 16 Old 12-10-2019, 11:50 AM Thread Starter
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I took the carb out and took it apart and sprayed it out w/ high pressure air.
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post #8 of 16 Old 12-10-2019, 11:56 AM Thread Starter
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It is completely stock. I have not checked the tank but I but I have been adding tank and engine cleaner everytime the tank is empty.
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post #9 of 16 Old 12-10-2019, 01:07 PM
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Originally Posted by Rebel250-1991 View Post
I took the carb out and took it apart and sprayed it out w/ high pressure air.
If there is varnish or other deposits in the carb, air alone won't remove them.

Is there some free play in the front and rear brake levers?

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
Putting your bike year and model in your signature helps others help you!
Here's how: https://www.hondarebelforum.com/f19/...re-121087.html
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post #10 of 16 Old 12-10-2019, 06:26 PM
 
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Quote:
Originally Posted by Rebel250-1991 View Post
It is completely stock. I have not checked the tank but I but I have been adding tank and engine cleaner everytime the tank is empty.



The tank and engine cleaners would probably affect mileage.


Try a tank of premium gas with no additives and check the mileage then.

2001 CMX250C Rebel
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