Vintage rules question

Discussion in 'WERA Vintage' started by dave3593, Aug 28, 2021.

  1. dave3593

    dave3593 What I know about opera I learned from Bugs Bunny

    Can a vintage class bike use a frame from a different vintage bike with the same age and operating principals? Like using a 1972 Yamaha frame in a 1972 Kawasaki in the V4 class?
    Tward the end of the chapter 11 vintage rules in the "Component Specification" section it says "hybrids (a motorcycle comprised of mixed origin or composition) are permitted, provided that the design and operating principle was in use prior to the cutoff date."
  2. britx303

    britx303 C.Thomas is Monica!!

    Sounds like it’s allowed since it’s the same time period.
  3. 90kacoupe

    90kacoupe Novice seeking Help

    My bighorn was allowed in Vintage and its a F9 motor in a S2 frame. Both Kawasaki but I would say you should be fine!
  4. dave3593

    dave3593 What I know about opera I learned from Bugs Bunny

    As you can see I'm trying to figure out what my next build will be.

    Thanks guys.
  5. Mongo

    Mongo Administrator

    It's tough given most Vintage classes call for Superbike type rules and what you're talking about is Formula based. The hybrids part does seem to allow it but not sure what the original intent of that line is. Be interesting to see what the input is on it.
  6. kenessex

    kenessex unregistered user

    I suspect the hybrid allowance was put into place to accommodate known combinations, like the Triton and Tribsa. I don't recall any other well known hybrids of that era other than those that used Rickman, Seeley or Egli type frames since most of the Japanese production frames weren't any better than the stock one that matched the motor. The only reason I see to do it now would be to use up left over frames and engines that somebody has laying around. As a vintage type guy, I wouldn't have any problem with it since there are no great 72 combinations which could be better than any other 72 frame with matching engine. Within the vintage rules, getting rid of 72 suspension and brakes is what would make the most difference and that is all open with limits.

    Go for it, what engine do you want to put in what frame? I may have some parts you can have.
  7. dave3593

    dave3593 What I know about opera I learned from Bugs Bunny

    I hesitated to go into detail because I don't want to come across as a dreamer although I do have several race bikes. Some that required a build which I really enjoy doing.

    My objective is to make a 2 stroke that fits in V4. One way is to just build a V3 and bump to V4. I don't like this option because V3 restricts you to 18 inch or larger wheels.

    I have another way that I believe is completely legal. I am asking about this since I don't want to build something and not be allowed to run it.

    The last paragraph of the rules chapter 11, vintage, says: "If a production street model motorcycle is built up to manufacturer road racer specifications it shall be considered a production road racer and shall compete in the next class up. A motorcycle will be considered to built to factory road race specifications if it employs any of the following: dry clutch; factory race cylinders or plated bore cylinders with no iron sleeve; factory or aftermarket racing head."

    Based on this I would start with a Kawasaki H1 500 triple. V3 allows it saying: "Pre 1974 2-stroke up to 500cc" The above stated rule says if the bike is built with certain upgrades it will be considered a production road racer and must compete in the next class up. This makes the bike ineligible for V3 but eligible for V4. As you can see it is not a "bump up" since the bike is no longer eligible for V3. Obviously one of the things that would put this bike in V4 is a dry clutch which I could add. Instead of the dry clutch I would prefer to put a race frame in it. I could make or buy a copy of an H1R or H1RA frame. Or maybe a custom frame of my own that started as a RD350 frame.

    OK, I spilled it. Can I run a version of this 500cc two stroke in V4?
  8. kenessex

    kenessex unregistered user

    I don't currently have a V4 bike, so I say go ahead. If I did have a V4 bike I would say go ahead, it would be cool.
    dave3593 likes this.
  9. cyclocrossfool

    cyclocrossfool Well-Known Member

    or you could buy my suzuki and race it v3,4 or whatever else, i did race a triple in a framecrafters custom frame at a few events last year, 4,5
    dave3593 likes this.
  10. dave3593

    dave3593 What I know about opera I learned from Bugs Bunny

    What kinda Suzuki?
  11. cyclocrossfool

    cyclocrossfool Well-Known Member

    a cool one
    fastedyamaha likes this.
  12. kenessex

    kenessex unregistered user

    Hey Tom,
    Did you know they make this stuff that comes in spray cans, so your bike can be all one color, not 4?:Poke:
    The T500 is cool.
    Buell1965 and Robin172 like this.
  13. cyclocrossfool

    cyclocrossfool Well-Known Member

    i think that if i dont sell it that im going to invest in a few cans of krylon . at least get the fuel tank and tail piece to match. my stuff always looks crap.
  14. dave3593

    dave3593 What I know about opera I learned from Bugs Bunny

    Very cool.
  15. 83BSA

    83BSA Well-Known Member



  16. cyclocrossfool

    cyclocrossfool Well-Known Member

    the suzuki sold to a uscra member , i bought a hd to race next year with the $$$
  17. kenessex

    kenessex unregistered user

    An HD what?
  18. cyclocrossfool

    cyclocrossfool Well-Known Member

    86 sportster, should be ready by spring
  19. cyclocrossfool

    cyclocrossfool Well-Known Member

    [​IMG] bars are on order. will need tires, steering damp. belly pan, etc, etc, etc
  20. dave3593

    dave3593 What I know about opera I learned from Bugs Bunny

    Can't get much different than a two stroke with a Harley.

    I am very curious as to how it does and in what class you will run.

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