2007 Eating Gas - 600RR.net
Exhaust & Fuel Delivery Tips on how to get the most out of your bike

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post #1 of 36 (permalink) Old 08-18-2013, 04:16 PM Thread Starter
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2007 Eating Gas

Im new to the cbr world, but not new to motorcycles and my cbr has the most random fuel milage ever. When I got it I averaged 140 miles to a tank and recently I have only been getting around 60 miles out of 3 gallons. Any tips on what could be causing this? I figure I will start with the basics of plugs and air filter. But could it be something that needs to be tuned? Thanks in advance guys.
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post #2 of 36 (permalink) Old 08-18-2013, 04:52 PM
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How long were you getting 140 miles to the tank? Was it during the break in period where you weren't going above 6k rpm? How aggressively you ride will have some play in what your mpg is.

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post #3 of 36 (permalink) Old 08-18-2013, 05:03 PM
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60 miles out of 3 gallons? something is wrong unless you dont get off like 14,000 rpm...
try also tire pressure in addition to what you mentioned, and check it out, otherwise idk somethings off

does it sound weird? does it smell rich(the exhaust) ? etc

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post #4 of 36 (permalink) Old 08-18-2013, 05:06 PM
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If your only getting 20mpg there's a big problem when I ride like an a55 I never get below 30mpg normal I'm arounnd 45 or so

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post #5 of 36 (permalink) Old 08-18-2013, 05:31 PM Thread Starter
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I got the bike with 12000 miles so there was no break in period for me. For the first 10 tanks of gas I averaged around 140 miles per tank with riding moderately hard on back roads and some highway. Recently I have been only riding to and from work/ school, mainly on the highway and I average around 60-80 miles per tank.

It runs fine with no engine lights but does smell a bit rich from time to time. I thought that was caused by an aftermarket exhaust.
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post #6 of 36 (permalink) Old 08-18-2013, 05:50 PM
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Check your tire pressure. When I first got my bike my mileage was bad but my tire psi was very low. Start simple

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post #7 of 36 (permalink) Old 08-18-2013, 05:59 PM Thread Starter
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I appreciate the help guyd. Im going to check the tire pressure when I get home tonight. It should be 32psi front and 42 rear..correct?
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post #8 of 36 (permalink) Old 08-18-2013, 06:06 PM
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Quote:
Originally Posted by Jcow View Post
I appreciate the help guyd. Im going to check the tire pressure when I get home tonight. It should be 32psi front and 42 rear..correct?

According to the 2007 Honda CBR600RR Owner's Manual page 136:

36 psi front
42 psi back

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post #9 of 36 (permalink) Old 08-19-2013, 10:13 AM
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What kind of exhaust?
Air filter brand?
Does it have a power commander?

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post #10 of 36 (permalink) Old 08-19-2013, 10:15 AM
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I don't know many people who run the "recommended" pressure. I personally run 32-34 front and 36 rear

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post #11 of 36 (permalink) Old 08-19-2013, 10:23 AM
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Quote:
Originally Posted by Bridge_Jumper View Post
I don't know many people who run the "recommended" pressure. I personally run 32-34 front and 36 rear
Same here!


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I'm glad lines have been identified...even if it is all the way at bukake....

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no he's not... I can already tell he's a soulless little fawker who is going to destroy everything you love


My long not exciting build, but I have hyperflo's
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post #12 of 36 (permalink) Old 08-19-2013, 10:52 PM Thread Starter
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Yoshi carbon exhaust. Just slip on. No power commander and I havent looked at my air filter yet. and my tire pressure was 34 front and 42 rear.
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post #13 of 36 (permalink) Old 08-19-2013, 11:34 PM
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36 front and 42 back. I don't get why you guys don't follow the manual unless your following a manufacture's recommendation. I also don't get why many people are buying into using different oil weights. "Well it depends on temperature outside and how hard you ride it"- as one would say. No matter how hot/cold it is outside or how hard you ride , your bike runs 170-220F.
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post #14 of 36 (permalink) Old 08-19-2013, 11:43 PM
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36 front and 42 back. I don't get why you guys don't follow the manual unless your following a manufacture's recommendation. I also don't get why many people are buying into using different oil weights. "Well it depends on temperature outside and how hard you ride it"- as one would say. No matter how hot/cold it is outside or how hard you ride , your bike runs 170-220F.
170-220F? You know your oil temps?




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Quote:
Originally Posted by Ldn View Post
I'm glad lines have been identified...even if it is all the way at bukake....

Quote:
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no he's not... I can already tell he's a soulless little fawker who is going to destroy everything you love


My long not exciting build, but I have hyperflo's
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post #15 of 36 (permalink) Old 08-20-2013, 12:11 AM
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170-220F? You know your oil temps?




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No I do not. I am guessing that your saying your oil temperature has no direct relationship with your engine (coolant) temperature? and that the weather has more of an affect on your oil temperature than your engine (coolant) temperature?

Last edited by Polishblood; 08-20-2013 at 12:16 AM.
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post #16 of 36 (permalink) Old 08-20-2013, 06:45 AM
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No I do not. I am guessing that your saying your oil temperature has no direct relationship with your engine (coolant) temperature? and that the weather has more of an affect on your oil temperature than your engine (coolant) temperature?
I'm not saying anything. You're the one that said oil weights were irrelevant due to the fact your bike always runs 170-220F. So I was asking how you know this...


But we move away from the main topic.

Op, I doubt having your rear wheel at 42 is going to eat your gas mileage that bad. Try lowering it to 34-36 and see if there is a major change.


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Quote:
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I'm glad lines have been identified...even if it is all the way at bukake....

Quote:
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no he's not... I can already tell he's a soulless little fawker who is going to destroy everything you love


My long not exciting build, but I have hyperflo's
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post #17 of 36 (permalink) Old 08-20-2013, 11:11 AM
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Air filter dirty?

pc3/5?

someone stealing gas from you, when parked?

20 mpg is really low, and indicates something is wrong.............
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post #18 of 36 (permalink) Old 08-21-2013, 06:27 PM Thread Starter
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Ive been messing around with tire pressure and it has little to no effect on gas usage. My next step is checking air filter and plugs. im guessing its one or both of those since I have noticed recently that its getting more and more sluggish on the low end.
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post #19 of 36 (permalink) Old 08-21-2013, 07:30 PM
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Check plugs and oil change. But I dunno. Just a suggestion

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post #20 of 36 (permalink) Old 08-21-2013, 10:15 PM
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Hmmm... I usually get 28-30 mpg around town and 30-33 mpg highway; and I've had engine work done, gearing changed (-1/+2) and have a custom Bazzaz mapping. If you're getting 20 with a stock or near stock bike, then I would take it to the dealership and let them know. I'm not sure you can attribute that much of an mpg difference to tyre pressure.
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post #21 of 36 (permalink) Old 08-21-2013, 11:29 PM
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START THREAD JACK

Quote:
Originally Posted by Polishblood View Post
36 front and 42 back. I don't get why you guys don't follow the manual unless your following a manufacture's recommendation. I also don't get why many people are buying into using different oil weights. "Well it depends on temperature outside and how hard you ride it"- as one would say. No matter how hot/cold it is outside or how hard you ride , your bike runs 170-220F.
First, different manufactures recommend different PSIs for different tires and uses. Tire pressure for canyon runs will differ greatly from that used for regular commuting.

Second, temperature has everything to do with oil.

Quote:
Viscosity is ordinarily expressed in terms of the time required for a st*andard quantity of the fluid at a certain temperature to flow through a standard orifice. The higher the value, the more viscous the fluid. Since viscosity varies inversely with temperature, its value is meaningless unless accompanied by the temperature at which it is determined.

At cold temperatures, the polymers are coiled up and allow the oil to flow as their low numbers indicate. As the oil warms up, the polymers begin to unwind into long chains that prevent the oil from thinning as much as it normally would. The result is that at 100 degrees C, the oil has thinned only as much as the higher viscosity number indicates. Another way of looking at multi-vis oils is to think of a 10w-40 as a 10 weight oil that will not thin more than a 40 weight would when hot.

Oil labeled as 10W-30 must pass the SAE J300 viscosity grade requirement for both 10W and 30, and all limitations placed on the viscosity grades, (for example, 10W-30 oil must fail the J300 requirements at 5W).
Our manual states that either 10w-30 or 10w-40 may be used.

Also
Quote:
Some vehicle manufacturers provide a range of recommended motor oil viscosity grades based on the outside temperature in which the vehicle is driven. Other manufacturers recommend the use of only one motor oil viscosity grade. For best engine performance, follow the manufacturer's recommendations.
END THREAD JACK

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post #22 of 36 (permalink) Old 08-22-2013, 12:44 AM
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Check if your fuel cap is sealing properly. You might be leaking fuel when you're in a lean or when your bike is on the sidestand. If it is leaking, you need a new fuel cap. I average 42mpg and I ride mines hard.
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post #23 of 36 (permalink) Old 08-22-2013, 02:09 PM Thread Starter
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It just got a fresh oil change within the last 500 miles with amsoil 10-40. Tonight im going to start pulling plugs. Thanks for the info guys its really helpful.
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post #24 of 36 (permalink) Old 08-26-2013, 01:51 AM
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I had to fill my tank up three times this week and even had my bike looked at on Wednesday. I'm in the same boat as you with the gas mileage.


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post #25 of 36 (permalink) Old 08-26-2013, 02:50 AM
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I thought it was only me. I use to get minimum 120 per tank. And that's only riding to the last Bar on the gauge that's with riding hard. Now for some odd reason I get only 90 to the last bar. I have 2bros slip on and k&n air filter. That's about it. Just did spark and oil change. So I can't explain why. If anybody figures it out id love to hear it.


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post #26 of 36 (permalink) Old 08-26-2013, 04:47 PM Thread Starter
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[QUOTE]I had to fill my tank up three times this week and even had my bike looked at on Wednesday. I'm in the same boat as you with the gas mileage.[QUOTE]

If you find anything out let me know. My plugs looked warn but not in need of replacement. My oil was just changed with amsoil synthetic. And my air filter looks good. Im out of ideas
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post #27 of 36 (permalink) Old 08-27-2013, 09:15 AM
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So I rode from Central Florida to Tenessee today, all highway averaging 70-75mph the entire way. I was getting 47MPG the entire trip (engine work, and -1/+2 sprockets; wonder how high it would have been stock :O ). I get 27-33 when I normally ride around the city or combination of city and highway. I can't believe it made 15-20MPG difference.
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post #28 of 36 (permalink) Old 08-27-2013, 09:24 AM
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Have you tried unhooking your battery to let your ECU reset?

Worth a shot, not like it cost anything but a few minutes of your time.


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post #29 of 36 (permalink) Old 08-27-2013, 10:38 AM
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Also get crap milage but I think mine is due to the bike running a little rich and I haven't checked my air filter or plugs either. But the flames out of the exhaust at night are a cool compramise.

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post #30 of 36 (permalink) Old 08-28-2013, 05:31 PM Thread Starter
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I will try to unhook the battery and let the ecu reset. I would have never thought of doing that. What will that accomplish by resetting the ecu?
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