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65 tooth vs 70 tooth

Discussion in 'Transmission / Drive' started by Coolbreezin, Feb 7, 2017.

  1. Coolbreezin

    Coolbreezin Active Member

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    How much of a difference will 5 more teeth on the back make in regards to rpm at 60mph? My rear pulley came apart and shredded my my belt. Im having a hard time finding a 65 tooth that I like. Also, how many teeth will I need on the belt if I go to a 70 tooth?
    I remember in the sportbike world it was 1 down in the front equals 3 up in the back. Not sure if that applies to our application.
     
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  2. FrankBDPS

    FrankBDPS Well-Known Member

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    What pulley did you have on you're bike? Did you try Bigdogpartsking
     
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  3. bdm7250

    bdm7250 Guru
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    Try here.
    http://www.ebay.com/sch/i.html?_odk...+tooth.TRS2&_nkw=big+dog+65+tooth&_sacat=6000
     
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  4. Coolbreezin

    Coolbreezin Active Member

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    Ive been rolling for the past 2 years on a DNA Demon pulley. Ive contacted Outlaw Cycles twice with no reply. kjhgv.jpg
     
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  5. Coolbreezin

    Coolbreezin Active Member

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    Ive contacted Shovelhead kicker about a replacement. But Id rather not use a BDM OEM pulley.
     
  6. bdm7250

    bdm7250 Guru
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    Your pulley only lasted 2 years?
     
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  7. bigkelk9

    bigkelk9 Well-Known Member
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    They sell em on their site and the new ones are supposed to improved and way better.. someone here just recently got one.. can't remember who.. but someone might chime in
     
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  8. Coolbreezin

    Coolbreezin Active Member

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    Yes, 3 arms.
    Yes, 25 months.
     
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  9. bdm7250

    bdm7250 Guru
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  10. Coolbreezin

    Coolbreezin Active Member

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  11. Coolbreezin

    Coolbreezin Active Member

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    CAM01529.jpg
    My first tow home with the new headlight. lol
    CAM01530.jpg
    Kind of hard to see but the inside wall of the pulley separated from the center part. Thats what shredded my belt.
    CAM01531.jpg
     
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  12. bdm7250

    bdm7250 Guru
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    :old2::old2:
     
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  13. FrankBDPS

    FrankBDPS Well-Known Member

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    Was the belt running off to that side? There sure wasn't much material holding that side plate on.
     
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  14. bdm7250

    bdm7250 Guru
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    Ya get what ya pay for..
     
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  15. Srodden

    Srodden Well-Known Member

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    Looks like there was some pressure in the wrong place. Side pressure, mis alignment, belt too tight there shouldn't have been any reason for the pulley to do that if the belt was running neutral in the middle.
    Just curious was pully billet or chromed ?
     
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  16. Mr. Wright

    Mr. Wright Guru
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    :agree:
     
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  17. blacktopper

    blacktopper Active Member

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    Did the screws come loose that hold the inside plate to the body?
     
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  18. Coolbreezin

    Coolbreezin Active Member

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    1 Sides are welded on.
    2 Belt was true for the past 10,000 or so miles. I fail to see how it suddenly shifted. The inside of the wall would shine like a mirror from all the rubbing.
    3 True, you do get what you pay for. I spoke to DNA and they told me that that the Demon pulley wholesales for more than I bought it for, so we think it was a leftover that the seller wanted to get rid of.
     
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  19. Srodden

    Srodden Well-Known Member

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    One more thing I see those rims those were on a recall. Are they original to the bike ?
     
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  20. 1mndg

    1mndg RIDE IT HARD!!!

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    A 70 tooth pulley compared to a 65 will change all gearing by 3.25%. Lower.
     
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