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Help 2KR Crate Motor - Wiring Help

Discussion in 'Yamaha 250cc In-Line 4's' started by Lynxdragon, Oct 19, 2016.

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  1. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    These are the 8" wheel's fitted to it now

    [​IMG]

    [​IMG]
     
    my67xr, Oct 24, 2016
    #21
  2. Lynxdragon

    Lynxdragon Well-Known Member

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    Thats pretty much exactly what im doing but for on the road. What sprocket sizes are you using?

    I was going to go 13/55
     
    Lynxdragon, Oct 24, 2016
    #22
  3. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    I'm pretty sure it has a 14T front and a 30T rear
    The little 110 top's out at just under 75km/h when it was run last with the 7" wheel's and it's still got torque off the line
    The new 8" wheel's are almost 1.5" taller so i might need to gear it down a bit with a 12T or 13T front

    [​IMG]
     
    my67xr, Oct 24, 2016
    #23
  4. Lynxdragon

    Lynxdragon Well-Known Member

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    I would love to see how its all mounted and seat positioning and such. Since mine is a trike, i need to try keep the weight above the axle. So might end up with the motor mounted odd, Playing with the idea of mounting a bracket to the clutch to drive the axle and bypassing the gearbox meaning I can mount the motor backwards and have easier choice of location. Sounds over complicated but its all a maybe.
     
    Lynxdragon, Oct 24, 2016
    #24
  5. Lynxdragon

    Lynxdragon Well-Known Member

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    Something like this is probably what I will do, Re-use the frame but change the rake angle something stupid, Scooter 12" front wheel from the Sym Jet4 I recently bought at auction.

    Actually looking at it now, I could totally just weld the axle to the swingarm and mount a seat on it... or could hard tail it...

    dam the possibilities...
     
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    Lynxdragon, Oct 24, 2016
    #25
  6. Lynxdragon

    Lynxdragon Well-Known Member

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    Okay spamming now but hey... I mentioned before I have a Sym Scooter, its a 50cc 2stroke roughly 2hp? Maybe thats wrong, But I could totally make one of these too;
     
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    Lynxdragon, Oct 24, 2016
    #26
  7. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Before i started modifying

    [​IMG]

    This is my son taking nanna for a drive

    [​IMG]
    Half way through the frame revision's

    [​IMG]

    Custom front end

    [​IMG]

    [​IMG]

    There is a rear mount hole through the back of the engine, and 4 bolt's up into the case underneath
    The engine is very close to a postie bike engine eg CT110
    [​IMG]

    Frame and swingarm have been strengthened and repaired many time's, there isnt much left of the original buggy frame/chassis now
    I have replaced the front ball joint's with high quality heim joint's as well.

    [​IMG]

    I had to make some 10mm thick steel adapter's to fit the 4 stud wheel's onto the 3 stud original hub's

    [​IMG]
     
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    Last edited: Oct 24, 2016
    my67xr, Oct 24, 2016
    #27
  8. Lynxdragon

    Lynxdragon Well-Known Member

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    So that video wasnt with a 250cc motor yet? Edit. Can totally see the FZR motor jammed in there. Damn!
     
    Lynxdragon, Oct 24, 2016
    #28
  9. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Nah i got the idea of fitting the 2KR engine into it after seeing that video, i haven't done it yet, sorry
     
    my67xr, Oct 24, 2016
    #29
  10. Lynxdragon

    Lynxdragon Well-Known Member

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    Its a race then. Im off to sleep, chao
     
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    Lynxdragon, Oct 24, 2016
    #30
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