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Thread: cr 250 conversion

  1. #1
    Join Date
    Mar 2005
    Location
    Underwood North Dakota Tiger country
    --
    1,055

    cr 250 conversion

    I just horse traded for a 85 cr250r looks a little ruff but motor is in great shape thinging about doing a conversion too a trike. what's the performance like out of these and would it be worth while doing. drag racing is the main goal here
    Trikes currently owned
    E.T. trike 150H.P. and climbing Pure DRAG beast
    85 250r project

  2. #2
    Join Date
    Mar 2005
    Location
    overton, PA
    --
    5,257
    the atac sylinder is junk and i belive it doesnt offer any mor eperformance than the atc motor forthat year. they didnt start makign real power until 87 or so
    ok here goes, 85 atc70,2 84 atc70's 83 alt50,83 atc110 , 70 us 90 parot green, 85/86 350x garage queen, stock rider 85 350x, project 85 350x 85 250r drag bike, 2 85 250sx's, alt185, , scat tracker?99blaster,85 250r rider,85 250r ice racer project ,93 kx500,99 xr200r, 91 dr250s ,89 lt500 quadzilla,88 lt250quadracer, 88 trx250r race full on race quad,, 01 yamahakodiak400, kawaki kd100,lt50 for my doughters,93 300ex, 230 quadsport, lt185, lt250 quadrunner,84200s, is that enough?

  3. #3
    Join Date
    Mar 2005
    Location
    Underwood North Dakota Tiger country
    --
    1,055
    will a atc cylinder fit on it
    Trikes currently owned
    E.T. trike 150H.P. and climbing Pure DRAG beast
    85 250r project

  4. #4
    jadleybray's Avatar
    jadleybray is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Mar 2007
    Location
    oregon
    --
    352
    The unbalanced cr would be harder on the chassis anyhow. There is lots to get outa the stock cylinder
    Attached Thumbnails Attached Thumbnails motor rh2.JPG  

  5. #5
    300rman's Avatar
    300rman is offline My other user 3WW ID was Nitebiker07. Teaching quads a lesson
    Join Date
    Nov 2007
    Location
    toledo
    --
    2,667
    you want a dragger, do a cr500 conversion

  6. #6
    Join Date
    Mar 2005
    Location
    overton, PA
    --
    5,257
    basicaly if you want a drag motor remove your counterbalancer and make somethign to eliminate the amout of rotating mass and the cr cylinder diesnt fit the 250r bottom end and the powervalved atac motors ran better witht he powervalve crap disconected and set manualy where u want the power.
    ok here goes, 85 atc70,2 84 atc70's 83 alt50,83 atc110 , 70 us 90 parot green, 85/86 350x garage queen, stock rider 85 350x, project 85 350x 85 250r drag bike, 2 85 250sx's, alt185, , scat tracker?99blaster,85 250r rider,85 250r ice racer project ,93 kx500,99 xr200r, 91 dr250s ,89 lt500 quadzilla,88 lt250quadracer, 88 trx250r race full on race quad,, 01 yamahakodiak400, kawaki kd100,lt50 for my doughters,93 300ex, 230 quadsport, lt185, lt250 quadrunner,84200s, is that enough?

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