Discussion Rare, Classic, or Just Right (No Fuggers)

Discussion in 'The Pub' started by maelstrom, Jun 19, 2020.

Page 3 of 4
  1. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,117
    Likes Received:
    3,481
    Trophy Points:
    1,148
    Location:
    Thailand
    Do the exhausts have to be the same length on a turbo? Can't see why you couldn't run the rear header around to the front. Not that I know much about Turbos.
     
    maelstrom, Dec 1, 2020
    #41
  2. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,300
    Likes Received:
    2,514
    Trophy Points:
    918
    Location:
    Albury 2641
    Equal length would be ideal but no different to a normal exhaust on the VT250F, they have the same length, just the rear one is a bit more convoluted in its routing..probably not "tuned" length for a road bike but certainly would have been for the twin turbo race prototype.
     
    Andych, Dec 1, 2020
    #42
  3. Jethalter

    Jethalter Well-Known Member

    Messages:
    408
    Likes Received:
    185
    Trophy Points:
    248
    Location:
    Australia
    Most turbo v-twin dont run equal pipes to the turbo, far from it. But the rear cylinder does loop around to the front.
    even in a vt250f you would still have to do this.
     
    Jethalter, Dec 1, 2020
    #43
  4. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,300
    Likes Received:
    2,514
    Trophy Points:
    918
    Location:
    Albury 2641
    Probably just pictures of it @Frankster as it was never put into production by Honda, as I mentioned earlier they tried to get type approval in Japan and it was rejected and it was at a time when Honda were copping plenty in Overseas markets (USA mostly) for their bikes being rocketships.. so they pulled the plug and never went into production.... there are pics etc in previous posts and you can search articles but they dont say if it was "only" run from the front or from both cylinders as there isnt any definitive info out there..and the pictures are too hard to determine anything due to the fairings etc... either way.. it would have been a cracking bike.
     
    Andych, Dec 1, 2020
    #44
  5. Jethalter

    Jethalter Well-Known Member

    Messages:
    408
    Likes Received:
    185
    Trophy Points:
    248
    Location:
    Australia
    I think you will find that the pic of the turbo, the shroud that goes from rear to front, would be covering the pipe that runs from rear to front for the turbo.
    or it could run underneath inside the belly pan.
     
    • Agree Agree x 1
    Jethalter, Dec 1, 2020
    #45
  6. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,300
    Likes Received:
    2,514
    Trophy Points:
    918
    Location:
    Albury 2641
    Andych, Dec 1, 2020
    #46
  7. gregt

    gregt Well-Known Member Premium Member

    Messages:
    330
    Likes Received:
    298
    Trophy Points:
    273
    Location:
    Hororata NZ
    Couple of points about the 250 vee turbo and the discussion.
    On a forward rotating vee twin, the front cylinder will always run hotter than the rear - air or water cooled.
    This is because of the oil spray distribution off the crank. Both front and rear cylinder walls of the rear cylinder will be sprayed off the big-end as it rotates. But because the rear wall of the front cylinder is at a rear-leaning inclination to the crank, it'll be dry.
    Also the rear cylinder itself masks entry to the front one. remember there is usually only an offset equal to one bigend width.Most of the big capacity, big HP vees have an oil feed to this area - even the air cooled Vincent. The Britten prototype I believe seized in this area a couple of times till someone looked at history.

    It would have been nice if Honda had put into production what was obviously a better lubrication system designed for the turbo but used it on the bread and butter unblown one. That would have saved countless VT250 engine blowups.
     
    Last edited: Dec 3, 2020
    gregt, Dec 2, 2020
    #47
  8. jmw76

    jmw76 Well-Known Member

    Messages:
    1,170
    Likes Received:
    600
    Trophy Points:
    498
    Location:
    Melbourne, Australia
    @gregt interesting thought.
     
    jmw76, Dec 2, 2020
    #48
  9. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

    Messages:
    4,036
    Likes Received:
    2,261
    Trophy Points:
    923
    Location:
    Tasmania
    Frankster, Dec 4, 2020
    #49
  10. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    10,931
    Likes Received:
    6,723
    Trophy Points:
    1,168
    Location:
    North by NW NSW Oztralia - Tamworth
    benelli 2.jpg benelli 1.jpg
     
    • Like Like x 3
    GreyImport, Jul 23, 2021
    #50
  11. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,300
    Likes Received:
    2,514
    Trophy Points:
    918
    Location:
    Albury 2641
    While I am not a massive fan of Cafe racer conversions this Honda 4 is lovely to look at... not sure how it would handle or stop but they have done a very good job on it.
    Honda 4 Cafe.jpeg
     
    • Like Like x 2
    Andych, Jul 24, 2021
    #51
  12. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,117
    Likes Received:
    3,481
    Trophy Points:
    1,148
    Location:
    Thailand
    No rear mudguard, so has to be exiled and put into that other thread.
     
    maelstrom, Jul 24, 2021
    #52
  13. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,300
    Likes Received:
    2,514
    Trophy Points:
    918
    Location:
    Albury 2641
    Then the Benelli goes as well
     
    Andych, Jul 24, 2021
    #53
  14. KiwiMat

    KiwiMat Well-Known Member

    Messages:
    134
    Likes Received:
    158
    Trophy Points:
    248
    Location:
    Australia
    Screenshot_20210724-091301_Gallery.jpg
    I WISH!!!
    TZ750 Harris frame on ebay for $60,000.
    2 stroke 4 cylinder. TZ750 had a few incarnations.

    Ebay blurb goes like this.....
    This 1979 race bike is for sale.
    TZ750 F Harris Frame - Lock Heed Brakes - 41mm adjustable forks
    Scitsu tachometer - Magnesium Crowns - 17ins. wheels alloy -
    hydro formed Peter Campbell exhaust - Electrex World Advance/Retard ignition - Log Booked
    A$60,000 -
     
    • Like Like x 2
    KiwiMat, Jul 24, 2021
    #54
  15. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    10,931
    Likes Received:
    6,723
    Trophy Points:
    1,168
    Location:
    North by NW NSW Oztralia - Tamworth
    Benelli is setup as a race bike not a 'cafe racer'

    benelli 3.jpg
     
    GreyImport, Jul 24, 2021
    #55
  16. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,117
    Likes Received:
    3,481
    Trophy Points:
    1,148
    Location:
    Thailand
    benelli 3.jpg
    If this were an example of the modern day "cafe" then the guard would be removed in the name of fashion.
     
    • Agree Agree x 1
    maelstrom, Jul 24, 2021
    #56
  17. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    10,931
    Likes Received:
    6,723
    Trophy Points:
    1,168
    Location:
    North by NW NSW Oztralia - Tamworth
    This one has a mudguard ... lots of mudguard :D

    britten.jpg
     
    • Like Like x 3
    • Love it! Love it! x 1
    GreyImport, Jul 24, 2021
    #57
  18. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,117
    Likes Received:
    3,481
    Trophy Points:
    1,148
    Location:
    Thailand
    There's a great line in the Britten documentary where John Britten says "you can spend just as much time making a lemon". Kiwis, you gotta luv 'em.
     
    • Like Like x 2
    • Funny Funny x 1
    maelstrom, Jul 24, 2021
    #58
  19. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    10,931
    Likes Received:
    6,723
    Trophy Points:
    1,168
    Location:
    North by NW NSW Oztralia - Tamworth
    yellow.jpg
     
    • Like Like x 2
    GreyImport, Jul 26, 2021
    #59
  20. KiwiMat

    KiwiMat Well-Known Member

    Messages:
    134
    Likes Received:
    158
    Trophy Points:
    248
    Location:
    Australia
    Screenshot_20210726-194905_Gallery.jpg
     
    • Like Like x 1
    KiwiMat, Jul 26, 2021
    #60
Page 3 of 4

Share This Page