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Commando Top Speed? (2010)

Discussion in 'Norton Commando Motorcycles (Classic)' started by highdesert, Dec 21, 2010.

  1. hobot

    hobot

    Joined:
    Oct 19, 2005
    hobot lived it up on Ms Peel so sorry for those outside their experiences, especially with only Norton parts, which is all they had in their hey days setting records for 1/4 m's and even endurance contests. Even in their hey day Commandos were known more for their acceleration than top end as essentially every other sports bikes had higher top speeds. For smug naysayers - we know of two all factory 750 Commandos the world opinion held impossible to beat the new cycles in 1/4 m, then put down 12.24s and 12.12s. I plugged conservative weight figures into drag-hp calculators to see results spit out *65* hp! That's what Norton claimed a Combat put out but who'd believe that - unless hard hearted enough to operate that harshly, like hobot. Still Ms Peel did not have the scary spunk my '68 P!! 9000 rpm dragger had - mid 10s 1/4ms, done a few years before me. It'd get almost 130 in 1/4 so easy to top 140 mph just beyond but I never approached that - maybe 120 riding with the 1%'rs Hogs it attracted, as too harsh vibes to hold for long. Also no way to break below mid 11s w/o a flat drag slick, so never felt the G's its race pilot did but good enough to best 750 triple smokers in cities. LOL Ms Peel claims I'm being challenged on were still kind of sluggish Norton performance to me, sheeze.
     
  2. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004

    That's a matter of opinion perhaps, but except for a time between late September 2015 and May 2016 he has still been posting here at fairly regular intervals.
     
  3. JimC

    JimC

    Joined:
    Oct 12, 2007
    Fast Eddy said:

    This site is A LOT more interesting when Steve posts regularly vs when he doesn’t. His recent break proves that.


    Like minded individual, I assume.
     
    Last edited: Apr 16, 2018
  4. baz

    baz VIP MEMBER

    Joined:
    May 26, 2010
    Yep I agree it's much more interesting with hobot about
     
  5. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    I had a '70 Bonneville many years ago and it ran very well. One day on a high speed test I saw 130 mph on the speedo. Doubting what I saw I took the speedo head into the local Smiths shop ( we had an actual Smiths repair shop in Don Mills at the north end of Toronto ) and asked to have it tested at 70 and 130 mph. It came back about 5 mins later and I was told it read 70 at 70 and 131 at 130 so was accurate. Took it out for another high speed run and crouched over on the tank I again saw 130 on the speedo. I whipped the clutch in and chopped the throttle and it instantly dropped to 114 and then rapidly slowed due to wind resistance. So Triumphs vibrate!!
    Who knew? Of course Nortons don't vibrate due to their superior patented Isolastic system.
     
  6. hobot

    hobot

    Joined:
    Oct 19, 2005
    Wesley took me to my 1st 2004 INOA rally 1000 miles away in Ohio, delayed by both our various Commando issues, to hesitate at entrance, that we made it and to scan the gathering, for him to say - "Its all only about the Commando."
     
  7. 84ok

    84ok

    Joined:
    Aug 10, 2014
    as far as facts & #s go today
    https://www.accessnorton.com/Norton...do-land-speed-racer-update.23695/#post-349189
    https://www.accessnorton.com/Norton...d-speed-racer-update.23695/page-2#post-349202
    https://www.accessnorton.com/Norton...g-saga-of-my-commando-land-speed-racer.22694/
     
    Last edited: Apr 16, 2018
  8. jseng1

    jseng1

    Joined:
    Nov 26, 2009
    Yes 84K
    149+mph with 240 lb rider Andy and no streamlining, officially timed. Herb built the motor.

    dyno'd at 90 rear wheel hp
    Norton Commando, 920cc; Mikuni VM40 carbs, bored to 44mm; extensive headwork to accomodate 44mm intake valves & 38mm exhaust valves; JS Motorsports rods and pistons; .480" lift cam; running on VP Racing Fuels C12 Gasoline. Stock Norton 4sp gearbox. 1.5 mile @ 149.2MPH.

    [​IMG]
     
  9. 1up3down

    1up3down

    Joined:
    Jan 12, 2011
    So long as we remember that there is no universal thruth
    ================================

    ah but I beg to differ sir, for we live in a world of science proven truths, verified and peer reviewed
    and laws of physics and mechanics are known, and stock Combats do NOT do 135mph
    and particularly they do not with a single Mikuni
    and no amount of long and rambling deflections will ever cover up for insistent lies
    1970s era Commandos do not give handling lessons to modern "corner cripples"
    Les rightfully allows that kind of talk on this forum, I get that, but I have every right to speak out
    in a respectful and non personal attacking manner
     
    Last edited: Apr 16, 2018
    delagem, kommando and JimC like this.
  10. JimC

    JimC

    Joined:
    Oct 12, 2007
    If anyone truly believes a stock Commando can do 135 mph, then I suggest they have all sharp instruments removed from their home. Definitely no power tools.
     
    delagem likes this.
  11. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Indeed you do sir! I genuinely couldn’t agree more.

    And we should all exercise that right. That is in fact my main argument in recent threads.

    Provided, as you say, it is done in a respectful and non personal manner.
     
    cliffa likes this.
  12. 84ok

    84ok

    Joined:
    Aug 10, 2014
    Last edited: Apr 16, 2018
  13. JimC

    JimC

    Joined:
    Oct 12, 2007
    Also, it is correct and proper to call BS when one see BS. Nothing disrespectful or personal about it. BS is BS.
     
  14. baz

    baz VIP MEMBER

    Joined:
    May 26, 2010
    The top speed of my 750 commando is around 110 maybe 115 if you waited long enough
    This is sitting upright
    My 850 would do just over 100
    I had a combat interstate that was running on R this would nudge 120 but this was almost prone with Vincent straights fitted
     
  15. jseng1

    jseng1

    Joined:
    Nov 26, 2009
    Yes but there is a reinforcing plate on those stock cases to help prevent them from cracking - probably heat shrunk into place. And the crank would need a radius as below.

    [​IMG]

    And it would never stay together without the reduced vibration/stress from the lightweight pistons shown above and modified by Herb Becker.
     
  16. 84ok

    84ok

    Joined:
    Aug 10, 2014
    & also the tunnel bored for a big cam
     
  17. o0norton0o

    o0norton0o

    Joined:
    Apr 27, 2015
    I value the clearly stated factual information that is posted here and many of the funny comments too. I've owned my norton for 40 years. It's an overwhelming task to learn every quirk of a commando by yourself. Prior to the internet, learning it by yourself was the norm. The technical knowlege in this community has helped me greatly in the short time I've been here. I appreciate the tone of the site which is set by the combination of the many people who contribute here.

    If you're the most prolific poster on a site and you're posting hyperbolically in an illiterate manner, you're setting a certain persistant unique tone. IMO, it's not helpful to others seeking factual information, at least I haven't found it to have any value for me.

    But as was said, if you don't like what a person writes or the style in which they write it, then don't read their stuff. That's what I do. As a kid, I read the lil' abner comic strip, so I can figure out what he's saying if I read his post 5 times, but I've found the information to be too hyperbolic, so now I don't waste my time. Perhaps I miss out on some unique entertaining gem of a comment occassionally, but his prose is too much work to translate into english sentences for me.

    As a rule, If I have something to add to a thread I try to say it in a single post. If someone querys my comment, I'll post again to explain myself further if need be. Unless I'm the thread starter or the thread becomes directed at me, I add my contribution to a thread without making the thread "all about me"...

    In all the forums of which I've been involved, there are always people who see the forum as purely entertainment, as well as those who see it as purely a vehicle to fact check and exchange good information. IMO, the site owner has to set the tone as to how much of each ingredient he wants on his site. People posting prolifically should be aware of how much they skew the overall tone of the site. If the site owner isn't annoyed by someone's tone... then there's no problem.

    I wish hobot's stuff was easier to read... but it's not so I don't bother reading it.



    As far as how fast an average norton can go without blowing up, I know the answer isn't 137mph. I've nipped at 100mph a few times just to see if my commando would blow up there, and it didn't thankfully. I don't have any special parts inside my engine so I wouldn't push it further than 100mph for just a few seconds. I run a 21/42 sprocket combination. I've always wondered what the average safe RPM range a commando can regularly run up to without eventually shooting a rod out of the crank case. I hope my engine lasts a long time as it is. It's been a 40 year long road getting to where I am now. I'm sure I've spent twice as much money on the bike as it's currently worth... so good info is important to me to keep my bike on the road and running well.
     
    Last edited: Apr 16, 2018
  18. hobot

    hobot

    Joined:
    Oct 19, 2005
    [​IMG]

    I have looked for decades for similar Norton build to my P!! dedicated top end only rocket. Woods & Axtel's comes dang close but not as see though minimalist nor front as low - to finally see it shown above in similar gold dusted deep blood red candy tank - to me a bit chopper stance - wheelie limited forks. P!! was cheap d/t Silva Mind Control win with a dash of cocaine dealing d/t Tallahassee's Florida Pagent's Norton dealership pilot crashing on last sprint at ~150 and then Hondas and Kiwi's took over. Thanx for topping hobot out in delight. In Vietnam era, friends/enemies nick named me Kowalski d/t louder sucking open intake than exhaust & embarrassing red necks in Z21 Cameros or crashing Porshes trying to follow on wet frwy clover leafs a Vista Cruiser wagon on Tiger Paws full of stoned witnesses thobbing on Jimmy Hendix 8track. Only thing ever passed Olds wagon was a James Bond Aston Martin DB5 on Hwy 441/Hwy 8/Tamiami Trail, but not in a flash but neat interval of appreciation - inspection. This is how I want to go, not in sleep or squirming in pain like Wes. Sudden Smithereens.

    [​IMG]
     
    Last edited: Apr 17, 2018
  19. Fullauto

    Fullauto VIP MEMBER

    Joined:
    Apr 13, 2009
    Well, there's a cheery thought, Steve.
     
  20. 84ok

    84ok

    Joined:
    Aug 10, 2014
    not clear on the "heat shrunk" part? i'm seeing what looks like a flat steel plate with 4 allen bolts, is that something new? 1st time i've seen it

    what's the "crank radius" about?

    [​IMG]
     

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