pm tuning/bgm crank

Discussion in 'Maxiscooter Tuning' started by DYS VTR, Feb 14, 2009.

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  1. DYS VTR

    DYS VTR New Member

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    DYS VTR, Feb 14, 2009
    #1
  2. bait

    bait Active Member

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    i know this wont help but ive orderd 1 2 day
     
    bait, Feb 14, 2009
    #2
  3. seanwhite06

    seanwhite06 New Member

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    runner 172, zx6r
    yup
    sure is! :D
     
    seanwhite06, Feb 14, 2009
    #3
  4. shiny red

    shiny red New Member

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    i have just put a bgm crank in an engine and also a pm tuning one,just about to do another pm one ?they might be made in the same place but different centers(cnc) have been used, different machining techniques have been used on each crank (the way the tool approaches the work),the conrods are cast differently ?how do you know the quality of metal used ?
    just cause they look (which they dont)the same dont mean they are?how do you know the quality of the bearings used in each one ,you dont unless you split one and get em tested
    i have been working with metal for too many years to mention,and i can tell you without a doubt in my mind that the bgm and pm are made on different centers?
    i can back this up with pictures but its sunday night we have had a good weekend and i cant be arsed but i am sure i will tomorrow :D
     
    shiny red, Feb 15, 2009
    #4
  5. DYS VTR

    DYS VTR New Member

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    ooo interesting.... so anyboy used the pm ones then as i need to order a crank tmoz and ive herd the pm ones beeing good..... yas an actual pm product thats good lol
     
    DYS VTR, Feb 15, 2009
    #5
  6. wobbly_trials

    wobbly_trials Active Member

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    i was always under the impression that PM used top-racing or mazzuchelli, or pretty much whatever they can get their hands on cheap.
     
    wobbly_trials, Feb 15, 2009
    #6
  7. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    pm used to use top racing (altho top racing are now diff) these all look like there made by the same people, BUT with diff materials as shinyy said. the castings of the web is identical as is the shape on the conrod altho its a diff colour meaning a diff material. the bearings are DEFFO different on the pm/bgm as the bgm dont have skanky rouch cut looking thrust washers ether side.. there is more of a chamfer on the bgm web and conrod.. im gonna grab a "top racing" one to check it out as for now ill stick with bgm for one simple reason

    [​IMG]
    [​IMG]
     
    MiNoR cOnFuSiOn, Feb 15, 2009
    #7
  8. DYS VTR

    DYS VTR New Member

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    i sware thats not ment to be stickin out lol, that a pm one?
     
    DYS VTR, Feb 15, 2009
    #8
  9. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    erm, ye


    hence the big sighn in the background... just MORE proof that pm take somthing, have it made as CHEAP as possible, then charge going rate for the GOOD part they copied... you gotta expect it from them.
     
    MiNoR cOnFuSiOn, Feb 15, 2009
    #9
  10. DYS VTR

    DYS VTR New Member

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    :( that how it came straight from them!??
     
    DYS VTR, Feb 16, 2009
    #10
  11. RY4N172

    RY4N172 New Member

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    i have a pm 54 crank, pretty decent :punk:
     
    RY4N172, Feb 16, 2009
    #11
  12. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    looks like somone took it out incorrwectly tbh (try'd to pry it out the case like a GOON) all sweet now.. try'd the same wiht a bgm thismorning.. would have taken ALOT of force to move it.... didnt take all that much to put that one back in tho. more evidence of SHITTY old machinery used to make them....
    they ARE ment to be the same, they look identical.. there REALLY REALLY not
     
    MiNoR cOnFuSiOn, Feb 17, 2009
    #12
  13. CU*TSPEED

    CU*TSPEED New Member

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    bloody confusing as i thought they all made at same place the top/bgm/pm
     
    CU*TSPEED, Feb 17, 2009
    #13
  14. wobbly_trials

    wobbly_trials Active Member

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    read the topic again. :w00t:


    thats the discussion.
     
    wobbly_trials, Feb 17, 2009
    #14
  15. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    they look identical.. hence i thought the same... on closer inspection and with a little "no minor, your wrong, look here" it comes to light there all just copying a good crank..

    so ye. UNKNOWN bearings in the pm crank, so probably chineese/malaysian quality.. will find out, havent had a bgm crank fail in 4 years using them.. pm have been about what, 2 years? wont be long
     
    MiNoR cOnFuSiOn, Feb 17, 2009
    #15
  16. CU*TSPEED

    CU*TSPEED New Member

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    im not going to name the shop as he may want to post himself
    he split a pm crank on tuesday to check out the bearings used and they are ok (he did say what they was but i forgot)
    the cranks aint made @ jasil but by motorforce or something like that
     
    CU*TSPEED, Mar 5, 2009
    #16
  17. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    ye, motorforce, same CHEAP ASS place that make there barrels.... pure chineese quality (and it shows from the tooling marks) i will no longer be recomending pm as a replacment for bgm cranks... along wiht everything they "make" its just cheap shit they had copied in china... FACT
     
    MiNoR cOnFuSiOn, Mar 5, 2009
    #17
  18. CU*TSPEED

    CU*TSPEED New Member

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    why does no one in the uk stock bgm cranks?
     
    CU*TSPEED, Mar 5, 2009
    #18
  19. nibbles

    nibbles Active Member

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    good q
     
    nibbles, Mar 5, 2009
    #19
  20. CU*TSPEED

    CU*TSPEED New Member

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    mr minor did you get to check out a top racing crank as psn are listing them again?
     
    CU*TSPEED, Mar 5, 2009
    #20
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