1. Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

BSA Spitfire Mk IV

Discussion in 'Other Motorcycles' started by dkavanagh, Jul 22, 2019.

  1. dkavanagh

    dkavanagh Well-Known Member Premium Member

    Messages:
    1,301
    Likes Received:
    570
    Trophy Points:
    113
    Location:
    Rochester, NY
    I found I never started a thread for this bike. It's a '68, last on the road in '77. I've finally gotten into the engine and it has +.020 pistons and the bores look pretty good, just need a hone. I have a series of videos I'm posting about the work on the bike. I posted 3 this past weekend!
     
    Franz and k-moe like this.
  2. dkavanagh

    dkavanagh Well-Known Member Premium Member

    Messages:
    1,301
    Likes Received:
    570
    Trophy Points:
    113
    Location:
    Rochester, NY
    Screen Shot 2019-07-22 at 8.25.49 AM.jpg I noticed there's a tube between the 2 intake runners on this bike. I think Yamaha's YICS wasn't an entirely original idea!
     
  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,613
    Likes Received:
    6,703
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    That tube balances the amount of fuel that leaks into each cylinder when the floats get pinholes in them :p
     
    Timbox likes this.
  4. dkavanagh

    dkavanagh Well-Known Member Premium Member

    Messages:
    1,301
    Likes Received:
    570
    Trophy Points:
    113
    Location:
    Rochester, NY
    yea, I was thinking about having it drain down to the hot exhaust.
     
    k-moe likes this.
  5. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,613
    Likes Received:
    6,703
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    That's a Harley thing. Patented too.
     
  6. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,613
    Likes Received:
    6,703
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    In all seriousness I have a bit of envy. I was very tempted by a '67 Lightning in the early 90's. I had to pass it up because $2200 was a bit too steep for me at the time. Seems like a bargain now though.
     
  7. dkavanagh

    dkavanagh Well-Known Member Premium Member

    Messages:
    1,301
    Likes Received:
    570
    Trophy Points:
    113
    Location:
    Rochester, NY
    I'm updating that youtube playlist regularly as I do more videos. I'm also posting in the britbike.com BSA forum as I go. Those guys are bringing me up to speed a bunch like when I joined here!
     
    k-moe likes this.
  8. JBurch

    JBurch Active Member

    Messages:
    210
    Likes Received:
    90
    Trophy Points:
    28
    Location:
    Owego, NY
    It''s good to see another Brit bike owner here, now I don't feel so out of place.

    Crank shaft rides on a ball bearing on the primary side, and a bronze bushing on the timing side; there is an up grade to a real bearing that can be done, depends on how hard are you going to ride it.
    Dick Mann "Buggisey" used to race them in AMA.
    "Earth" is "Ground" and it's positive
     
  9. Kickaha

    Kickaha Active Member Premium Member

    Messages:
    729
    Likes Received:
    87
    Trophy Points:
    28
    Location:
    New Zealand
    I'm another one, 1956 BSA A10 Gold Flash [​IMG]
     
    Franz likes this.
  10. dkavanagh

    dkavanagh Well-Known Member Premium Member

    Messages:
    1,301
    Likes Received:
    570
    Trophy Points:
    113
    Location:
    Rochester, NY
    Looks like my bike had a bearing upgrade of some type that timing side bushing was problematic, so various other solutions we're tried. ( Can't seem to upload the photo from my phone)
     
  11. dkavanagh

    dkavanagh Well-Known Member Premium Member

    Messages:
    1,301
    Likes Received:
    570
    Trophy Points:
    113
    Location:
    Rochester, NY
     

Share This Page