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  1. #21
    Senior Member 83XLX's Avatar
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    Quote Originally Posted by jjdugen View Post
    ...Compared to a Triumph these are silky smooth!
    You speak the truth. I used to have a '73 Triumph Tiger 750 and it was a paint shaker.
    1969 Honda CL350
    1983 H-D XLX-61 Sportster

  2. #22
    Member Don G.'s Avatar
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    Man. Okay, things to think about. I knew they could rev higher (10k redline on the tach), but it sounds like it's crying for mercy after 6000rpm. I'll have to do some experimenting when I get it back on the road in March. With the vibration, I can make believe I'm getting a cheap massage.

    Thanks again for your thoughts. Great stuff.
    • 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

  3. #23
    Sensei 66Sprint's Avatar
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    IF you want to hear "crying for mercy", type Honda RC 149 into your search bar......This 125 cc engine would spin 20,500 RPM , produced 34 HP and would go 130 MPH......

    OR Honda RC 166, OR RC 116 OR....Etc......

    This is back in the mid 1960's.........Honda USED the lessons learned racing them......
    Last edited by 66Sprint; Yesterday at 07:03 PM.
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."
    Contact info: E-mail; [email protected] Phone; 540-525-5199

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  5. #24
    Member Don G.'s Avatar
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    This 125 cc engine would spin 20,500 RPM , produced 34 HP and would go 130 MPH

    Holy crap!! I don't think I'd want to be in that saddle.

    -edit-

    Okay, I just searched as you suggested. A five cylinder 125cc! I'll say it again. Holy crap!
    Last edited by Don G.; Yesterday at 07:59 PM.
    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

  6. #25
    Sensei 66Sprint's Avatar
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    My REAL point is that Honda was well aware of what the appropriate rev ranges were for its bikes.....
    IF you keep yours below the redline, but in the upper revs, it will still perform properly and reliably......
    They are designed to gallop, not just trot......
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."
    Contact info: E-mail; [email protected] Phone; 540-525-5199

  7. #26
    Super Moderator longdistancerider's Avatar
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    Quote Originally Posted by Don G. View Post
    With the vibration, I can make believe I'm getting a cheap massage.

    Thanks again for your thoughts. Great stuff.
    You should feel what's it like after a 600 mile ride, Ensenada Baja to Santa Clara CA. Every part of you is vibrating hours later lol:
    One thing that may help is replace items 3 and 4 in this fiche. Those vibration dampeners harden up with age and transmit instead of dampening.
    https://shop.westernhonda.com/fiche_...1&fveh=1699694
    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
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  8. #27
    Member Don G.'s Avatar
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    Good to know about those dampeners. Thanks!
    • 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

  9. #28
    Member JDerrick's Avatar
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    Quote Originally Posted by Rscottp View Post
    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.
    Wow, I've been lugging my engine big time. I usually upshift at around 3000 rpm. At around 60 - 65 I think it is only revving at around 3500 to 3800 rpm in 5th gear. I may be mistaken, since I have only driven it that fast 3 to 4 times.

    I will try to take it beyond 3000 before upshifting now. See how she does. Thanks for the info!

    Is 3500 to 4000 rpm normal at around 55 to 65 mph in top gear?

  10. #29
    Super Moderator ancientdad's Avatar
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    Quote Originally Posted by JDerrick View Post
    Is 3500 to 4000 rpm normal at around 55 to 65 mph in top gear?
    Unless the speedo is no longer as accurate as it once was (and they weren't perfect even when new), the overall gearing - trans ratios, primary drive ratio and final drive (chain and sprockets) ratio - are all predetermined and the rpm range you see in each respective gear is what it will be. Unlike any version of automatic trans or drive, where there is some slippage (except for modern cars with lock-up torque convertors), manual transmissions do not vary and will always read the appropriate rpm for the gear selected.
    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

  11. #30
    Super Moderator longdistancerider's Avatar
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    Speedo reading fast, tach reading slow, different sprockets from stock can all be making the readings off.
    In 5th gear at 55 mph you should be hitting @4800 and at 65 a little over 5600.
    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

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