Excelsior V-Twin DO YOU WANT ONE?

Discussion in 'Photos & Bicycle Builds' started by G-Superior, Mar 28, 2010.

  1. G-Superior

    G-Superior Member

    I would love to have a bike like this one to go to school! :tt1:
    Would you?
    Its a excelsior V-twin from 1914 and i bet you that you need to pedel it really fast to get it started with does 2 'fatty' pistons :sweatdrop:
    Here is a video of a similar bike.Its the second one with the wild exhausts(its an Indian but looks the same)

    www.youtube.com/watch?v=aRO5UtYxFjM

    It would be nice if there was a kit like the chineses like this one!
    have fun!
    :D
     

    Attached Files:


  2. mabman

    mabman Member

    Bring back the board track!

    They would hear you coming for sure. There are a ton of nice board track replicas on this site. No one has stepped up to build a 49cc V twin engine yet though to complete the authenticity of the concept.
     
  3. happycheapskate

    happycheapskate Active Member

    It might not be as hard to start as you suspect. Some of those engines had compression relief valves if I am not mistaken. This would allow the engine to run inefficiently but turn more easily, till the bike was fully fired up.
     
  4. Fabian

    Fabian Well-Known Member

    Now that's what we need: a replica small capacity V-twin engine for our motored bikes
     
  5. fm2200

    fm2200 Member

    That twin would sell real well particularly with all that chrome, even without the chrome it would be a great engine. It's the prettiest engine I ever did see, it would probably have a substantial impact on this mb market. Maybe some factory in China could duplicate this, I think they would if they thought it would be a big seller. I'm pretty satisfied with the little 2 stroke banger I now use, but it would be really great if they were being manufactured.
     
  6. 210061741

    210061741 Guest

    afer i am done with the stage 3 maybe i will tackel this one.

    Would it really be worth my time and effort ??

    You all know i can do it.
     
  7. Chris Crew

    Chris Crew Member

    brakes? what brakes? we don't need no steenkin' brakes!
     
  8. 210061741

    210061741 Guest

    Only other thing.

    You would probably be looking at a price tag of $2000 / $3000.

    Still want it ???

    Let me know
     
  9. Fabian

    Fabian Well-Known Member

    Holy heck Rich,

    Write yourself into motorised bicycling folklore by manufacturing a V-twin engine to work with a jackshaft setup.
    You will be known around the world for decades to come and even your grandkids will be in awe of what you would have achieved with pioneering spirit, grit and determination to see the project through to completion and volume manufacture.

    A V-twin bicycle engine - that's the holy grail of motor bicycling.

    Fabian
     
  10. G-Superior

    G-Superior Member

    i actually have some plans in mind in building a shared crankcase twin cylinder 2 stroke engine!
    the basics of it are actually pretty simple
    2 pistons from a husqvarna(35mm) or from a sthil (the husky one has only one ring while the sthil has 2)the with a stroke of 25mm which gives it 24.1cc per cylinder or 48.1 for both
    single carb for easy tuning with reed valves with a shared crank pin like a harley
    I still tinking which angle would be the best, i think 45 is the one because both pistons are at tdc at the same time so spark timming would be easy to set up, (not sure correct me if im wrong!)
    best thing:
    probably 8 horse would be easy because twins have 70% to 80% more power to cc ratio(read that somewhere)
    If anyone has anymore info 2 stroke twins reply because i have been everywhere and it dosent seem to be alot of info out there :(
    and Im getting a CNC lathe from my school because they dont have the software for it and they cant be bothed to get one they just giving it to me because they know im intrested in mechanical stuff (they even enterd my in a free colege and uni. for mecanical engenering)
     
  11. G-Superior

    G-Superior Member

    v twin 50cc pistons

    so pics of the pistons thay i might use:
     

    Attached Files:

  12. wildemere

    wildemere Member

    A two stroke V twin won't run well on a common crank case.

    Especially with a shared crank pin.

    Each cylinder needs its own sealed crankcase for it to transfer the charge.

    Google "two stroke V twins" and have a read.
     
  13. G-Superior

    G-Superior Member

    forget the v twin-keep it simple first time!

    I think IS BETTER TO START SIMPLE
    Im just goin to make a single cylinder 50cc(all hand build) with all the best quality stuff.Going to get some hight quality ball bearing for the botton end and needle for the main and small end on the rod(my local engenering shop has french, german and british quality bearings so im going to get some more info about then this week)
    sand casting is easy and i bet you that i can make a better one than the cheapy chineses :yes:
    Ive got plenty of aluminium from cylinder heads(got at least 3 big ones)
    And i have plenty of time!(but not much noney :( )
     
  14. Could the cylinders fire a degree apart or whatever and use the same crankcase ? maybe I will google as suggested .
     
  15. Fabian

    Fabian Well-Known Member

    Hi G-Superior

    Those Meteor pistons are good quality items.

    I've just finished a top end rebuild on a Dolmar PS-9010 chainsaw and it runs perfectly with good power and excellent compression.

    When i enquired about the price of a genuine Dolmar piston and rings, i was told the price was $245
    After some searching around i came across the meteor brand which was being sold as replacement parts for common chainsaws.
    The company was "Northwoods Saw" in America and they said the pistons are made in Italy., which must be better than Chinese garbage.

    The price was $37 American and the delivery to Australia was $10 at slow shipping rate (10 days or longer).

    It worked out to around $55 Australian (after currency conversion) to have the piston delivered to my door.
    Contrast that figure with $245 Australian for a genuine Dolmar piston.
    The quality of the casting is not quite as good as the Dolmar but it is very close and the chainsaw engine runs flawlessly.

    Fabian
     
    Last edited: Mar 30, 2010
  16. G-Superior

    G-Superior Member

    im probably going to start a thread on 'wild on the streets`or in 'general discussions` to get some ideas of how would a perfect 2 stroke motorized bike engine should look and perform(maybe there is more people that want a 5, 6 or 7 hp engine than people that want a full racer 20hp 50cc because they would just twist and bent frames and wheels :tt1:)
    Ideas would be really good and i know that this forun is got plenty of it! :D
    I think i have a big chance of making a little 50cc motorized bike engine for less than 150$ which out runs the performance, reliability and looks of a chinese HT engine!
    you will probably be surprized how much money you need to make a 2 stroke engine :eek:
    Take care
    G
     
    Last edited by a moderator: Dec 17, 2015
  17. happycheapskate

    happycheapskate Active Member

    Your wish is granted, Fabian

    http://www.youtube.com/watch?v=R-oLV9DW_n8

    http://www.youtube.com/watch?v=I67FI5ABQxE&feature=related
    Ok, its too many CC for some states, but it sure sounds good. (Maytag washing machine engine on beach cruiser)

    PS this is a two stroke engine. I am not sure, but I think it has alternating strokes instead of synchronized piston strokes. (in effect, 1, 2, 1, 2, not 1&2, 1&2)

     
    Last edited: Mar 31, 2010
  18. G-Superior

    G-Superior Member

    maytag crankcases?

    Thanks for the idea Fabian :idea:
    Does anyone know if the maytag twin as shared crankcase? and when does it fire each piston?
    I was just wondering if it is I can just duplicate it in small model(2x 25cc) in angle:tt1:
    it wont be that hard and sure it would look good :tt1:
     
  19. Fabian

    Fabian Well-Known Member

    Loved the Maytag boxer twin engine.

    I would say it works the same way my Echo CST 610 EVL chainsaw works. Both pistons at top dead centred, collectively drawing in air/fuel mixture into the crankcase and both pistons at bottom dead centre, forcing mixture through the transfer ports.

    This is the same method used on small glow plug boxer twin R/C engines.

    It would be an interesting engineering challenge to make a boxer twin work in a motorised bicycle application, but it would be a very smooth and refined engine; something that non of us have ever experienced using Chinese single cylinder engines.

    Fabian
     
  20. G-Superior

    G-Superior Member

    the only problem that i see in a twin boxer or V is that i will be to wide so the pedal crank would have to be modified :sweatdrop: but overall it would be extremely smoth with a tone of torque and low rpm :tt1:
     
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