3mil crank questions

Discussion in 'General Support' started by TrynaLearn, Mar 2, 2020.

  1. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    I wanna put a 3mil in my blaster... what exactly do i need to do for it to be efficient cause i wanna keep stock bore and will ky 28mm keihin be good enough with my fatty
     
  2. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    And is the vitos +3 worth getting... and will i need to do to get the max performance out of it
     
  3. Larry's Shee

    Larry's Shee Active Member

    Joined:
    May 23, 2009
    Messages:
    8,629
    Likes Received:
    914
    Trophy Points:
    149
    Occupation:
    Unemployed carpenter
    Location:
    Ortskaville, MI
    There's no replacement for displacement :D
    IMHO well worth the extra price! I replaced a good crank because I was replacing cases. Ibelieve it comes with instructions. you do have to check rod clearance to cases. you pout crank in one half with piston and jug on. Calls for .020, I went .040, just because.

    For MAX power you would have to have cyl ported. You could do some porting yourself however. If you don't use spacer plate you MUST have head rechamber for the stroker. Either way head mod will add power because the head design is not suited for max powwa.
     
    Slydog likes this.
  4. Larry's Shee

    Larry's Shee Active Member

    Joined:
    May 23, 2009
    Messages:
    8,629
    Likes Received:
    914
    Trophy Points:
    149
    Occupation:
    Unemployed carpenter
    Location:
    Ortskaville, MI
    BTW, I used the spacer plate with raised exhaust port, Fat Bastard pipe and run the stock carb no problems. Yeah, I could get more with a bigger carb, but I'm to old to stupid and fast!
     
  5. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    So i can use a 3mil with stock bore( no bbk) and get port work done and be fine
     
  6. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    I really wanna stay with my stock bore easier to get pistons where i live... just wanna get a little more pop outta my baby
     
  7. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    My builder called today i decided to get the 3 mil and get everything ported will my 28mm keihin be ok with proper jetting or will i need a bigger carb
     
    Slydog likes this.
  8. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,804
    Likes Received:
    313
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    Yes you can use stock cylinder
     
  9. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,804
    Likes Received:
    313
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    With the crank and port work there will be a. Very noticeable power gain.are you rechambering the head also. It's cheap mod. Your carb will work.
     
  10. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    I ended up letting him drop the 240 and 3mil in it
     
  11. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,804
    Likes Received:
    313
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    Are you porting the 240?just the 240 alone without porting you won't get near the power you could out of it.
     
  12. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    Ended up changing my mind again got ported done head work and a 3mil
     
    Slydog likes this.
  13. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,804
    Likes Received:
    313
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    Sounds fun. Who's doing it?
     
  14. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    Got a local builder amd machine shop
     
  15. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,804
    Likes Received:
    313
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    Have they ported blasters before.
     
  16. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    Yes did one i had before... had a drag port 240 la sleeve vitos 3mil stand up in 5th... this time i got agressive trail port as i ride more trails now... 68 3mil with head work to match stroke
     
  17. TrynaLearn

    TrynaLearn Member

    Joined:
    Jan 24, 2018
    Messages:
    109
    Likes Received:
    8
    Trophy Points:
    55
    Gender:
    Male
    What is the ending hp result of trail port and 3mil
     
  18. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,804
    Likes Received:
    313
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    Don't really know any numbers.your port and head mod are going to be different from the next person.its what your asz dyno says it is:D it should be a very noticeable difference over non ported cylinder:(
     
  19. Larry's Shee

    Larry's Shee Active Member

    Joined:
    May 23, 2009
    Messages:
    8,629
    Likes Received:
    914
    Trophy Points:
    149
    Occupation:
    Unemployed carpenter
    Location:
    Ortskaville, MI
    Depending on how you do it you should be getting close to 30 hp, stock is 17
     
    Slydog likes this.
  20. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,804
    Likes Received:
    313
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    That's what i was thinking. Just wasn't sure:cool:.
     

Share This Page