CMB Crank Balancing

Discussion in 'Motors Forum' started by Stuart Barr, Nov 4, 2018.

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  1. Nov 4, 2018 #1

    Stuart Barr

    Stuart Barr

    Stuart Barr

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    We finally have a source for balancing the CMB cranks.  This is a two tungsten slug recommended for only the CMB 45 VAC, 45 V.5, 67 HR, 67 HR EVO and 80 HR.  All the other CMB motors DO NOT need this.  The balancing increases the pug life for those that like to run these motors a very high RPM (like me).  Please contact Kent Ballard at rcboater1@hotmail.com or call him on his cell phone at 515-689-5609 (central time) to have this service done.  Price has been set at $65.00 per crank.  This includes return shipping by UPS.

    Stu Barr
     
  2. Nov 4, 2018 #2

    Alan Elzer

    Alan Elzer

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    Nice. Thnx for info

    Sent from my SM-N920V using Tapatalk
     
  3. Nov 4, 2018 #3

    John Beardslee

    John Beardslee

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    Great news! Thanks Kent!!!
     
  4. Nov 4, 2018 #4

    charles siler

    charles siler

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    Thanks for the heads up Stu
     
  5. Nov 4, 2018 #5

    Duke Mordja

    Duke Mordja

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    Awesome news.  
     
  6. Nov 6, 2018 #6

    timwhalen

    timwhalen

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    Thank you, Stu...and Kent, as well.

    HRbouchie1.png
     
  7. Nov 19, 2018 #7

    Craig Limbocker

    Craig Limbocker

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    Hello Stu,

    I maybe getting one of the .45 V5 from you shortly, is this something I need to have done? Curious as to why.

    Thank you,

    Craig
     
  8. Dec 27, 2018 #8

    TomGracey

    TomGracey

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    TNX for the heads up STU

    Just had my CMB .67 HR Evo balanced by Kent can't wait to see how it runs now.

    Really Fast turn around TNX Kent
     
    Last edited by a moderator: Dec 27, 2018
  9. Dec 29, 2018 #9

    Stuart Barr

    Stuart Barr

    Stuart Barr

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    Craig,

    A balanced crank helps plug life at high RPM. 

    Stu
     
  10. Dec 30, 2018 #10

    tom galdys

    tom galdys

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    I don't understand the dynamics or physics behind a balanced crank and plug life. I have had my Vac45 done and a lot of run time on it. But why? Thanks Tom
     
  11. Dec 30, 2018 #11

    David Ashcroft

    David Ashcroft

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    Tom if a rotating part is balanced then Vibration is eliminated ,.Which can only mean a smoother running engine if the crank is balanced ..As for longer plug life hmmm perhaps...but alot of factors come into play with that...
     
    Last edited by a moderator: Dec 30, 2018
  12. Dec 31, 2018 #12

    Gilbert Pun

    Gilbert Pun

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    Stu,

    That means Gas Evo engines need no balancing ?

    I used to balance all my Zenoah engine cranks .

    Gilbert
     
  13. Dec 31, 2018 #13

    Tom Foley

    Tom Foley

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    Just imagine the plug element vibrating wildly already from engine RPM and then another type of vibration from out of balance engine components making it even worse .
     
  14. Dec 31, 2018 #14

    Buckshot

    Buckshot

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    Gilbert,

    The CMB .27 EVO do not require balancing. Neither do any of the "stacked" crank or "Evolution" style CMB motors (i.e. .45 RS EVO, .91/1.01 RS EVO). Only the .45 and .67/.80 "cantilever" style cranks benefit from the added tungsten slugs.  
     
  15. Dec 31, 2018 #15

    Stuart Barr

    Stuart Barr

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    Thanks guys.  Y'all beat me to the punch.
     
  16. Jan 5, 2019 #16

    TomGracey

    TomGracey

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    Just received my CMB .67 HR EVO back TNX  Kent for really fast turnaround

    IMG_1632.JPG
     
    Last edited by a moderator: Jan 5, 2019
  17. Jan 10, 2019 #17

    Mikemalloy

    Mikemalloy

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    Thank you Kent for getting my 3 .67 EVO  crankshafts balanced and shipped back to me so quickly,  Awesome customer service and job well done!!

    Mike Malloy
     

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