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Thread: highway riding

  1. #11
    Member Don G.'s Avatar
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    Quote Originally Posted by 83XLX View Post
    At higher speeds, wind fatigue and engine vibration seem to increase exponentially in relation to speed.
    Ain't that the truth. At our advanced ages, neither the bike nor I want to work that hard or go that fast.
    83XLX likes this.
    • First bike ridden: older brother's '70-something Honda CB450
    • First bike owned: '70-something CB500/4
    • after that, a 40+ year non-riding dry spell
    • July 2019: rented a Yamaha V-Star 250 for a day...and was re-hooked
    • Sept. 2019: bought a 1981 CM400t

  2. #12
    Super Moderator ancientdad's Avatar
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    Quote Originally Posted by Don G. View Post
    Ain't that the truth. At our advanced ages, neither the bike nor I want to work that hard or go that fast.
    Oh I don't know... I still want to go that fast, but I just don't want to work that hard...
    83XLX and oupa like this.
    Tom

    CL450 project reboot, street legal this time
    Budget drag bike project
    CB350K1 full patina project
    Ride along at the drag strip


    running points... because I'm too old for mysteries that begin with pushing

  3. #13
    Member Don G.'s Avatar
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    Quote Originally Posted by longdistancerider View Post
    Note that the ignition timing doesn't hit full advance until 5350 rpm IF the electronics are perfect which with age they're not, probably hitting full at 5800-6000. Bare minimum rpm while riding is 4000
    Jim, I'm not sure what you mean by that. My comfort factor on this bike is in fifth at 3500-4000rpm. It seems like it's happy there, too. And I still feel like a twist of the throttle will get me moving as quickly as I need to. Are you saying it's more efficient or meant to be driven at 4k minimum most of the time?
    • First bike ridden: older brother's '70-something Honda CB450
    • First bike owned: '70-something CB500/4
    • after that, a 40+ year non-riding dry spell
    • July 2019: rented a Yamaha V-Star 250 for a day...and was re-hooked
    • Sept. 2019: bought a 1981 CM400t

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  5. #14
    Senior Member Rscottp's Avatar
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    I ride my CX500 on a few road trips around NE and I def don't enjoy riding on the highway for too long. You get a sore neck if you haven't done it in a while. I also find it more stressful than riding on smaller roads even though statistically it is safer.
    oupa likes this.
    1981 Honda CX500D
    1974 Honda CB450
    1986 Yamaha Radian 600

    Martha's Vineyard Ma

  6. #15
    Senior Member Rscottp's Avatar
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    Quote Originally Posted by Don G. View Post
    Jim, I'm not sure what you mean by that. My comfort factor on this bike is in fifth at 3500-4000rpm. It seems like it's happy there, too. And I still feel like a twist of the throttle will get me moving as quickly as I need to. Are you saying it's more efficient or meant to be driven at 4k minimum most of the time?
    Under 4k is "lugging" the engine and it isn't good for it. Most of these bikes are designed to be revved higher, don't be afraid to do it. It isn't a Harley.
    1981 Honda CX500D
    1974 Honda CB450
    1986 Yamaha Radian 600

    Martha's Vineyard Ma

  7. #16
    Member Don G.'s Avatar
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    Okay, thanks. I guess I'll just have to get used to the sound of it revving higher.
    • First bike ridden: older brother's '70-something Honda CB450
    • First bike owned: '70-something CB500/4
    • after that, a 40+ year non-riding dry spell
    • July 2019: rented a Yamaha V-Star 250 for a day...and was re-hooked
    • Sept. 2019: bought a 1981 CM400t

  8. #17
    Super Moderator longdistancerider's Avatar
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    Here's a dyno sheet on my 400. Dark line is horsepower, light line is torque. Note the cross over point at @5300, vertical lines start at 2,000 rpm with the lines starting @2600.
    highway riding-dyno-results-small.jpeg.jpg
    You can see the torque and HP curve drop off at @4300, the same time the mixture starts leaning out a little. The drop off at 9K is partially due to the timing retard I programmed in from 43 degrees to 41.
    Yes, 4,000 rpm is in the lugging zone so if you were that low you would need to downshift before accelerating.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 nuts and bolts restore in progress


    https://www.hondatwins.net/forums/22...d-attempt.html and https://www.hondatwins.net/forums/1-...r-attempt.html
    Road Trip https://www.hondatwins.net/forums/11...here-i-go.html or "where's Jim now?"
    Member Map https://www.hondatwins.net/forums/dcMembermap.php

  9. #18
    Senior Member 83XLX's Avatar
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    Quote Originally Posted by Rscottp View Post
    Under 4k is "lugging" the engine and it isn't good for it. Most of these bikes are designed to be revved higher, don't be afraid to do it. It isn't a Harley.
    Yeah, 4000 rpm on my old Sportster is over 80 mph. Again, wind blast and vibration are the enemy...lol
    1969 Honda CL350
    1983 H-D XLX-61 Sportster

  10. #19
    Senior Member 83XLX's Avatar
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    Quote Originally Posted by longdistancerider View Post
    Here's a dyno sheet on my 400. Dark line is horsepower, light line is torque. Note the cross over point at @5300, vertical lines start at 2,000 rpm with the lines starting @2600...
    Well, technically, they cross at 5252, but now I'm nitpicking...
    1969 Honda CL350
    1983 H-D XLX-61 Sportster

  11. #20
    Member jjdugen's Avatar
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    To get anywhere interesting I have to ride at least 30 -40 miles on UK motorways. Believe me, if you are not at a minimum of 60mph you are causing a roadblock! I put an 18t front sprocket on to help reduce revs a little, UK style flatter bars help to duck out of the wind, but mine seems quite content at 7000rpm all day. Overtakes have to be planned, but she'll happily take me through 80mph (and more on a downhill). The only 'drag' on performance is a headwind which does make it harder work. These engines, for all their simplicity, are both robust and surprisingly peppy. Twist that grip, quite a bit more. Compared to a Triumph these are silky smooth!
    83XLX likes this.

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