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Thread: Fuel efficient coasting?

  1. #11
    Senior Member Jt105's Avatar
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    No, not madness. Just trying to better understand how the engine and fuel injection works under certain conditions.

    JT

  2. #12
    Senior Member
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    Quote Originally Posted by DirtFlier View Post
    [...on the DCT when I am coming up to a stop I put it in sport and it down shifts pretty much where I would do it...1WiseGuy2]


    Not that I've tried but I assumed it is NOT possible to shift between D and S when the bike is still rolling?

    All this talk of squeezing another ounce of mileage from a bike that normally returns 65-70 mpg is pure madness. I could somewhat understand it if our fuel was $7+ per gallon as it is across the pond, but the latest fuel prices where I live is around $2.45 per gal.
    Yes, you can shift anytime you want to. From manual, sport, or drive. Doesn't matter.
    For me fuel mileage is an indicator of the health of the bike, but also a game on how high I can get it sometimes. ie; Yesterday, I even drove the speed limit for 3 hrs in my diesel VW touareg just to see what kind of fuel mileage it would get. Side note: it too can be switched to sport, manual or drive on the fly! Fuel efficient coasting?

    Sent from my SM-N960U using Tapatalk

  3. #13
    Senior Member anglachel's Avatar
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    Quote Originally Posted by New Commuter700 View Post
    I don't do much engine braking as I unlearned the habit a few years ago with cars. It was pointed out to me that changing brakes is easier than clutches and allowing the engine to idle is better than spinning it up, especially it you drop it into a too low gear as I did often. Remember that the less times the engine turns, the less wear and tear there is on it. That's one reason I went with the NC in the first place because it doesn't run at 10,000 rpms on the freeway. Also consider that over 100k miles on your bike if you get about 70 mpg you are only using about 1428 gallons of fuel. At $3 per gallon that's only $4284, less than the cost of a new bike. Getting 75 mpg instead is about $4000, a savings of $284 over the life of the bike. So saving a few mpg's may not be worth a decrease in durability.
    The clutch isn't what's providing the braking force when you are engine braking, it's the compression in the engine (unless you are slipping the clutch the whole time) so the clutch will wear less from engine braking then the brakes will wear from regular braking.

    And normal engine wear (from the engine doing what it's designed to do move the piston up and down) is unlikely to be the wear and tear that takes a bike off the road... (it's half a fit engine** and those things can run for 100s of thousands of miles in a car, and even then the engine failing is rarely the reason for a car getting scrapped anymore.)

  4. #14
    Senior Member Fuel efficient coasting?
    Bike: SV,NC,berg 570s
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    Quote Originally Posted by 1wiseguy2 View Post
    Yes, you can shift anytime you want to. From manual, sport, or drive. Doesn't matter.
    For me fuel mileage is an indicator of the health of the bike, but also a game on how high I can get it sometimes. ie; Yesterday, I even drove the speed limit for 3 hrs in my diesel VW touareg just to see what kind of fuel mileage it would get. Side note: it too can be switched to sport, manual or drive on the fly! Fuel efficient coasting?

    Sent from my SM-N960U using Tapatalk
    if mileage is an indicator of the health of the bike, mine must be in pretty awful shape
    12 NC700X
    11 FE570
    11 FS570
    15 450/520XCF SM

  5. #15
    Senior Member Fuel efficient coasting? dduelin's Avatar
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    Quote Originally Posted by anglachel View Post
    The clutch isn't what's providing the braking force when you are engine braking, it's the compression in the engine (unless you are slipping the clutch the whole time) so the clutch will wear less from engine braking then the brakes will wear from regular braking.

    And normal engine wear (from the engine doing what it's designed to do move the piston up and down) is unlikely to be the wear and tear that takes a bike off the road... (it's half a fit engine** and those things can run for 100s of thousands of miles in a car, and even then the engine failing is rarely the reason for a car getting scrapped anymore.)
    I cringe whenever I hear the reference to "Half a Fit engine" (it isn't, not even close) but your points are valid.
    Dave

    GL1800
    NC700XD




  6. #16
    Senior Member HarveyM's Avatar
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    Quote Originally Posted by DirtFlier View Post
    [...on the DCT when I am coming up to a stop I put it in sport and it down shifts pretty much where I would do it...1WiseGuy2]


    Not that I've tried but I assumed it is NOT possible to shift between D and S when the bike is still rolling?
    I often shift between modes 'on the fly'. There's a limited access drive that I like to do in S & then I shift to D when I turn off into the community. For that you only need to close the throttle. But for hyper-milers you can't shift from D into Neutral while the wheels are turning (according to the owner's manual).

  7. #17
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    if mileage is an indicator of the health of the bike, mine must be in pretty awful shape Fuel efficient coasting?

    Junkie I almost put something in there about wrist usage and exercise! Hahahahaha

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  8. #18
    Junior Member
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    Quote Originally Posted by dduelin View Post
    I believe clutches are built to last a long time when treated well, particularly Honda wet clutches. I replaced the clutch plates in my 1972 Kawaski but that's the only one of twenty something bikes to follow and I like a perfectly timed throttle-blipped downshift for the right gear at the right time. Haven't worn out a Honda engine yet either...one has 194,000 miles on it now with the first 180,000 under me.
    Now you've got me curious.... are you talking about a bike here?

  9. #19
    Senior Member Fuel efficient coasting? dduelin's Avatar
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    Quote Originally Posted by jtanner View Post
    Now you've got me curious.... are you talking about a bike here?
    Yes, talking about bikes. In 2018 I sold my '05 Honda ST1300 with 180,000 miles on it. That's not really high mileage in the ST world. There are quite a few over 200k and some over that with 430,000 miles the highest I know of.
    Dave

    GL1800
    NC700XD




  10. #20
    Senior Member
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    Quote Originally Posted by dduelin View Post
    Yes, talking about bikes. In 2018 I sold my '05 Honda ST1300 with 180,000 miles on it. That's not really high mileage in the ST world. There are quite a few over 200k and some over that with 430,000 miles the highest I know of.
    I'm giving my son my 2007 ST and it only has 46,000 miles. Told him it should last him his whole life if he takes care of it... he is 19.

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