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Purity of design...

Discussion in 'Vincent' started by Fast Eddie, Oct 1, 2019.

  1. tricatcent

    tricatcent

    Joined:
    Jul 30, 2009
    A few years ago after a British Motorcycle Owners Club meeting we rode to a local cafe for a coffee. I was on my Vincent with my girlfriend on the back. My friend Chris was right behind me on his Ducati Panagale. We got to the cafe, and Chris said, wow that Vincent can really accelerate. I am pretty sure the Panagale has about 170 HP and the Vincent about 60 HP, but the Vincent gets going right away.

    My bike is pretty standard and it easily does 100 MPH in third gear. I am not sure how fast it can go in fourth. The only mods are 8:1 pistons (standard late Shadow spec) 105 cams, and 34mm carbs. I does tend to leave other bikes behind. I have a 900ss Ducati 1975 and it is way faster than the Vincent, while having some similar power characteristics, I am sure the Panagale has double the power of my 900ss but still the Vincent has the grunt to get going really quickly.
     
  2. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    It's not horse power that counts its engine torque that gives it grunt.
     
  3. worntorn

    worntorn

    Joined:
    Dec 22, 2006
    I've got a real nice old 650 BSA that has 1 more claimed bhp than a Rapide.
    It's a nice looking bike, I enjoy riding it, but to quote John Mcdougall, " it ain't no Vincent" Put a passenger on board plus luggage and it is pretty slow on mountain passes.

    A lot of old bikes don't quite measure up to the period road test hype. The Vincent is one that , if anything, outperforms expectations.
    Somehow it's more machine than the sum of its parts.
    I find that the detractors have never even ridden one, much less owned one long term.

    Glen
     
    HRD, Fast Eddie and ericg like this.
  4. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    On top of your points Glen, many Vincent’s did huge mileages. My own had done 132,000 miles by 1962. How many it had done in total by the time I got it in around 2000 is anyone’s guess.

    Prices of old used Vincent’s plummeted in the late 60s and through the 70s. That put a lot of heavily worn out Vincent’s in the hands of many who’s enthusiasm outstripped their means. Seems to me that’s when much of the ‘problematic’ folklore was born.
     
    worntorn likes this.
  5. worntorn

    worntorn

    Joined:
    Dec 22, 2006
    All of this and warm sunny weather (55f) here got me going.
    Just had to go for a ride and enjoy the two Phil's creation all over again!

     
  6. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Crawdad harvesting near a 1947 Rapide

    20130619_140653.jpg
     
    Fast Eddie likes this.
  7. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Nice pics Glen.

    What are the rear shocks you’re running on that?
     
  8. worntorn

    worntorn

    Joined:
    Dec 22, 2006
    The rear shock in my photo is a Koni.
    I'm not sure what brand the coil-over shock is in the above photo.
    Maybe an AVO?

    Glen
     
  9. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Oops, I wasn’t awake, I thought the pic above was your bike Glen!
     
  10. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    The 47 Rapide shock pair were a custom Vincent build from Works Performance. I dont think they, WP, are offering this Vincent pair any more. Too bad cause they work well for me.

    WorksVN-44003side.jpg
    VN-44004 WP part number for the pair.......order/purchase year 2007
     
    Last edited: Mar 16, 2020
  11. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Yes, they certainly look like they’ll work a lot better than the stock stuff!

    You weren’t tempted to put something similar on the front too?

    I had Thornton stuff on a Vin once (dunno if they’re still going), the dampers worked well, but the springs really messed up the ride hight. I ended up keeping the dampers and fitting Godet springs, that sorted it.
     
  12. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    The threaded body spring preload allows for height, also allows different spring selections,
    I have adapted to the Bramptons as stock setup. I have several Girdraulics to compare and Girdraulics are nice.
    But Bramptons rule.
     
    Last edited: Mar 16, 2020
  13. acotrel

    acotrel

    Joined:
    Jun 30, 2012
    How much grunt remains depends on how high you raise the overall gearing, and a close ratio gearbox will help most bikes accelerate faster, because you ride the top of the torque curve. The correct gearing is where the motor just continues to pull at the end of the longest road. If it runs out of puff, the overall gearing is too low.
     
  14. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    Or if you get the gearing just right, because the bike has run out of its power, and is incapable of running /pulling a higher gear ratio. Unless one day you have a 20mph tailwind. ( by changing rear wheel sprocket)
     

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